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- Connector Glossary
We will introduce and explain connector types, names of each part, and connector terms related to specifications in an easy-to-understand manner.
Contents List
numbers
2-Point Contact structure
IRISO' "2-Point Contact structure" is a concept that has two contacts on the same line.
4-terminal method
A technique for accurately measuring small resistances by minimizing the voltage drop in the leads by separating the current supply and voltage measurement loops. Accurate resistance measurements are possible because very little current flows through the leads to the voltmeter, which has a much higher internal resistance than the object being measured. This method is used to measure the contact resistance of connectors, etc.
8b10b
8b10b is a coding invention developed by IBM in the early 1980s and is sometimes called 10b8b.
A
Auto I-Lock structure
IRISO' FPC/FFC connector "Auto I-Lock structure" is a connector with a structure that automatically locks when an FPC/FFC card is inserted.
B
BMS (Battery Management System)
This is a battery monitoring (management) system used to prevent overcharging and overdischarging of lithium-ion batteries used in automotive batteries.
BERT
This is a test in which an actual digital signal is input to a certain transmission system or device and the frequency of errors for a certain period of time is checked.
C.
CAE (Computer Aided Engineering)
It stands for Computer Aided Engineering.
CASE
It is a coined word that indicates near-future trends in automobiles, and is an acronym for Connected, Autonomous, Shared & Services, and Electric.
CPA (Connector Position Assurance)
It is a mechanism that ensures the correct Mating position = mated state.
D.
DIP type
This is a type of connector in which a through hole is made to mount a component on a printed circuit board, and the legs (leads) of the component are passed through and soldering (mounted).
E
EMC/EMI/EMS
EMI, also known as Electro Magnetic Interference, is noise generated by electronic devices and parts during operation.
Engineering plastic
Resins that have mechanical strength, heat resistance, and chemical resistance compared to general-purpose plastics are collectively called engineering plastics/engineering plastics, and those with particularly high performance are called super engineering plastics. Such plastics are often used in connectors, and even now, the materials that are evolving day by day are contributing to the high performance of connectors.
ESD (Electro-Static Discharge)
ECD=Electro-Static Discharge is a discharge phenomenon of static electricity.
Ethernet
A standard for local area networks (LANs) that appeared in the 1970s.
F
FFC（Flexible Flat Cable）
An FPC is manufactured by a method similar to electric wires, and is mainly made by arranging thin flat copper wires and laminating them with insulating tape from above and below in the longitudinal direction.
FPC / FFC Connectors
General term for connectors developed for connecting FPC substrates (Flexible printed circuits) and FFC cables (Flexible flat cables). ZIF (Zero insertion Force) type that can lock FPC/FFC with almost no force when inserting the connector, and NON-ZIF type that can be inserted with light force are available.
FPCs
Printed circuit board = PCB (printed circuit board) is flexible as a base material, mainly polyimide, LCP, etc. is used to give flexibility, and it has intermediate properties between electric wires and substrates.
FTP (Foiled Twisted Pair)
An abbreviation for Foiled Twisted Pair, it is a twisted wire structure with a collective (foil) shield for the entire cable.
H.
HB
Flame-retardant grades that pass the resin horizontal combustion test based on the flame-retardant UL94 standard are certified.
I
Interface Connector
An interface (I/F) connector is a connector that connects information and signals between devices, and is also called an I/O (input/output) connector.
I-Lock type
This type has IRISO 's unique locking method "I-Lock" structure, which locks the notches of the FPC/FFC with temporary holding terminals on both ends of the connector.
iNARTE
This is a global technical qualification that certifies EMC technology and skills, established in 1988 by iNARTE, an American non-profit organization.
L
LCP
An abbreviation of Liquid Crystal Plastic, it is a liquid crystal polymer. It is a super engineering plastic that is often used for connector housings. It has good flowability and is suitable for thin-walled molding.
M
MIPI (Mobile Industry Processor Interface)
Acronym for Mobile Industry Processor Interface. It was standardized as an interface standard for cameras and displays of mobile devices, but it is also used in a wide range beyond that, especially for image transmission in FA and in-vehicle equipment.
Multi-source agreements (MSAs)
An agreement between multiple manufacturers to produce compatible products between vendors in order to establish a competitive market for interoperable products.
N.
NON-ZIF type (Non-Zero Insertion Force)
A type in which the FPC/FFC is directly inserted into the card slot of the connector.
NRZ (Non Return to Zero)
Non Return to ZERO: This is a method of improving data efficiency by eliminating the insertion of zeros in signal transmission (RZ), which always inserts zeros between each bit in digital signals.
P
PAM4
This is a transmission method in which 2 bits are superimposed. In normal NRZ, there are 2 steps, Low = 0, High = 2, but there are 4 steps, 1st step = 00, 2nd step = 01, 3rd step = 10, 4th step = 11 (eye pattern If you write it, it will look like two normal eye patterns overlapped vertically).
PBT
It is one of the engineering plastics.
PCBs
It is a general term for a board or film on which wiring is formed, and is also called a printed circuit board or printed board.
PCIe (Peripheral Component Interconnect-Express)
An abbreviation for Peripheral Component Interconnect-Express, it is an extended interface standard for high-speed serial transmission.
R.
Rigid type
A type of connector that does not Floating in the pitch direction, row direction, or Mating direction.
S.
S-parameters
In a multiplex connection, this is a parameter that expresses the mutual relationship between the magnitude and phase of each input and output signal.
SER/DES (SERializer/DESerializer)
SER/DES is short for SERializer/DESerializer and is a combination of two functions (chips): a serializer and a deserializer.
SMT type（Surface Mount type）
This is a type of connector that soldering (mounts) parts directly to an integrated circuit using surface mount technology.
STP (Shielded Twisted Pair)
An abbreviation for Shielded Twisted Pair, it is a shielded twisted wire structure.
STP file
A file format defined by ISO10303 for sharing data between different CAD systems.
T
TCO (Total Cost Ownership)
Originally, it means "total amount of time and expenditure required from purchase to disposal of an asset". refers to the way of thinking
TDR/TDT measurement
There are TDR (Time Domain Reflection), which looks at reflection characteristics, and TDT (Time Domain Transmission), which looks at transmission characteristics, with measuring equipment in the time domain.
Terminal Position Assurance (TPA)
A double locking mechanism for fixing the connector terminal at the correct position after it is inserted into the housing and temporarily fixed.
U
USB (Universal Serial Bus)
An abbreviation for Universal Serial Bus, it has become the most popular serial bus standard in recent years for connecting peripheral devices to information devices such as computers.
UTP (Unshielded Twisted Pair)
An abbreviation for Un-Shielded Twisted Pair, it is a twisted wire structure without a shield.
V.
V0
It is a flame-retardant grade that is certified by passing the resin vertical combustion test based on the flame-retardant UL94 standard.
VSWR
This is the voltage standing wave ratio, and is a parameter that indicates the relationship between the traveling wave and the reflected wave.
Z.
ZIF type (Zero Insertion Force)
After inserting the FPC/FFC into the card slot of the connector, the card is sandwiched by a function such as a slider cover (cover).
Z-Move structure
IRISO' "Z-Move structure" is a connector that, in addition to Floating structure Floating movement on the X- and Y-axes, adds a structure that Floating the Z-axis to move while the contacts remain fixed, making it possible to absorb minute board amplitudes caused by resonance at high vibration frequencies.
A line
Actuator
It is based on the English meaning "drive device" and is a thing that "converts input energy into physical motion".
Pressure Welding
This is one of the methods of attaching electric wires to WtoB connectors. In pressure welding, the conductor is clamped between opposing blades with a gap smaller than the dimensions of the conductor.
Crimp
This is one of the methods of attaching electric wires to WtoB connectors. In this method, a crimping terminal is placed over a conductor (mainly a stranded wire), and the terminal and conductor are fixed by "crushing" them within the specified dimensions.
Annealing
Also called "annealing", it is a manufacturing method and phenomenon in which metal is distorted and softened under high temperature.
Arrhenius plot
This is a method of applying a calculation formula based on the temperature dependence of the chemical reaction rate to the accelerated aging test.
Angle type
A type of connector in which the Mating surface is perpendicular to the surface of the mounting board when mounted.
ethernet
A standard for local area networks (LANs) that appeared in the 1970s.
Ion Migration
It is a phenomenon in which the metal on the "anode" side is ionized under high temperature and high humidity, and the metal on the "cathode" side is eroded when a voltage is applied on the substrate.
Dissimilar Metal Contact Corrosion
This is a phenomenon in which when dissimilar metals come into contact with each other in an electrolyte or the like, a current flows, and electrons are lost to the metal that is more important, causing corrosion.
Insertion loss
Especially for high-frequency signals, it becomes smaller when the input signal is output through the transmission line. The parameter that indicates the degree of this reduction is called insertion loss/insertion loss, and is defined as the ratio of the output signal to the input signal, and the unit is mainly dB.
Interface (I/F) connector
An interface (I/F) connector is a connector that connects information and signals between devices, and is also called an I/O (input/output) connector.
Impedance Matching
Matching the characteristic impedance before and after connection.
Whiskers
It means "whisker-like thing" and refers to a whisker-like crystal precipitate mainly generated from tin plating in connectors.
Engineering plastic/engineering plastic
Resins that have mechanical strength, heat resistance, and chemical resistance compared to general-purpose plastics are collectively called engineering plastics, and those with particularly high performance are called super engineering plastics.
Embossed Packaging
It is a packaging method compatible with automatic mounting, in which parts are packed in a predetermined direction in each recess of a tape with recesses at regular intervals, and used as a reel.
Creepage Distance
A term that defines the space between connector terminals and conductors. It defines the route along the circumference of the normal shortest distance (also called the clearance distance) when there is an insulator in the middle.
male
It is a connector on the sticking side, which mainly has contacts on the protrusion.
brass
A copper alloy consisting of copper and zinc, it is inexpensive as a spring material.
Pollution degree
Pollution degree is also called pollution degree. Please refer to the pollution degree page for the pollution degree classification from 1 to 4 and our response to the pollution degree.
Pollution degree
The equipment is classified into levels 1 to 4 according to contamination such as dust in the air in which the equipment is used, and the rated voltage is determined according to the spatial distance and creepage distance between metals that generate a potential difference.
Ka line
Card Edge Connectors
A Socket Connectors that connects to a board by inserting the Mating part that is simply formed on the PCB.
Accelerated aging test
Since the speed of chemical reaction is dependent on temperature (active at high temperature), this test verifies the life at actual temperature by looking at deterioration at a temperature higher than the actual temperature.
Hot-swap
The connection is made while the equipment is in an energized state.
Galinstan
A eutectic alloy of gallium, indium, and tin that is liquid at room temperature.
Mating
It refers to mating, or connecting, mating connectors.
Board to Board Connectors
Connectors developed for connecting printed circuit boards are also called board-to-board connectors. A variety of connections are possible by combining plug connectors and Socket Connectors, such as Right angle connection connection, parallel (stacking) Horizontal connection, and horizontal connection.
Resonance
A natural vibration is caused by an external stimulus. There are mechanical ones and electrical ones.
Polar key
Especially for WtoB connectors, this is a mechanism to prevent mis-Mating when using connectors of the same specification at the same time.
killer foreign matter
We define foreign matter that interferes with Mating /electrical contact as "killer foreign matter," and carry out thorough management in the product manufacturing process along with product design according to each specification.
Gold flash
An extremely thin gold plating, usually applied by electroless plating.
Crack
It means cracks. For example, when stress is applied to a component mounted on a board by soldering, the stress is applied to the soldering part, and cracks may occur there. This is called a soldering crack.
Grid connector
Grid means "grid", and the type of connector in which terminals are arranged in a grid pattern is called a grid connector.
crosstalk
Crosstalk is the noise that one signal line receives from another signal line in multiplexed signal transmission/multiplexed transmission lines. The name of the telephone communication era remains as it is.
Group delay
This is a phenomenon in which the propagation time of a signal changes depending on the frequency.
high speed transmission
As electronic devices become more sophisticated and complex, the amount of information in electrical signals to be connected by connectors is increasing with the times. In other words, the frequency of electrical signals is increasing, and along with that, what is called the "length" wavelength of electrical signals is getting shorter and shorter. What this means is that signals are more affected by smaller or shorter transmission lines.
High-speed transmission Connector
IRISO' High-speed transmission Connector are a product group that supports high-speed transmission while retaining the conventional superior functions such as Floating structure mechanism and Auto I-Lock structure. Even with terminals with complex structures, they have a stable impedance profile, enabling high-level support for high-speed transmission.
High heat-resistant Connector
One of the characteristics required for High heat-resistant Connector, especially important for heat resistance is maintaining contact resistance in a high temperature environment. Connector terminals, so-called connecting parts, are mainly made of copper alloy. Contact resistance depends on the contact pressure between the terminals, and is usually achieved by providing a spring mechanism on one or both sides of the pair of connectors.
brass
A copper alloy consisting of copper and zinc, it is inexpensive as a spring material.
fixed connection
A type of connector that does not Floating in the pitch direction, row direction, or Mating direction.
Fixing boss
A protrusion for fixing the connector to the board, in addition to positioning during mounting, it also helps withstand stress from the lateral direction after mounting.
Coplanarity
This is an index that indicates the horizontal accuracy of the terminal arrangement.
Common mode
In differential signal transmission, the in-phase component of two signals is called common mode.
Corson copper alloy
It is a special copper alloy with Ni and Si as main ingredients, and many grades have been developed.
Sa line
Inviting structure
A guiding structure is a structure in which the frontage of the housing is widened and the taper on the wall surface guides the connector toward the center, or an additional part called a guide pin is provided in order to facilitate the Mating of the connector.
differential signal
In the transmission path, 1/2 of the signal to be sent and the inverted phase signal are sent at the same time, and the receiving side performs subtraction (difference) to restore the original signal.
jig
A general term for equipment used to fix an object during processing.
Shunt resistor
A resistor inserted to detect the current value of the circuit.
Redundant connection
It's a way of maintaining connectivity through an alternate path if an unintended loss of connectivity occurs at some point.
Single row type
A connector with terminals arranged in a row.
Right angle connection
Connection using straight type and right angle type connectors (ST-RA). This name comes from the fact that when the cross section of the connected substrates is viewed from the side, the substrates are perpendicular to each other.
Horizontal connection
Connection between right angle type connectors (RA-RA). This name comes from the fact that when the cross section of the connected substrates is viewed from the side, the substrates are horizontal.
Super engineering plastic
Resins that have mechanical strength, heat resistance, and chemical resistance compared to general-purpose plastics are collectively called engineering plastics/engineering plastics, and those with particularly high performance are called super engineering plastics.
Stack/Stacking
This word means "to stack" and is another name for a balanced connector that connects boards by stacking them.
Standoff
This is the distance between the bottom of the connector and the surface of the board, which is intentionally provided to secure the mounting surface.
Strain relief
A part attached to the cable side of the I / O Connectors (cable assembly product) to alleviate stress strain caused by sudden bending at the base.
straight type
A type of connector in which the Mating surface is parallel to the surface of the mounting board when mounted.
Slider cover lock type/ Slider cover type
A type that unlocks by pulling out both ends of the slider cover (the cover slides).
Through-hole type
This is a type of connector in which a through hole is made to mount a component on a printed circuit board, and the legs (leads) of the component are passed through and soldering (mounted).
Through hole via
A board term that refers to a via that runs through a board.
Through-hole reflow
This is a reflow technology for dip-mounting products that conventionally require flow mounting.
Electrostatic shield
A part that is mainly composed of metal and is placed to cover the product.
Contact pressure
This is the pressure when the contacts of the connector are in contact.
Contact resistance
This is the electrical resistance that occurs when electrical connections are made through a connector.
insertion loss
Especially for high-frequency signals, it becomes smaller when the input signal is output through the transmission line. The parameter that indicates the degree of this reduction is called insertion loss/insertion loss, and is defined as the ratio of the output signal to the input signal, and the unit is mainly dB.
Socket
It is primarily a connector with holes or gaps that accept mating contacts.
Socket Connectors
IRISO' "Socket Connectors" is a general term for connectors that are widely used for connecting devices and for internal connections when combined with pin headers (plugs).
Solder tail
It is a leg that is soldering to a connector board, etc., and especially refers to the one that supports SMT.
Line
Touchstone format
A file format for storing S-parameters, the file format for circuit simulation software from EEsof (currently a division of Keysight) has become the de facto standard.
Staggered array
Terminals and lead frames for mounting are arranged alternately between opposing rows.
Twinax cable
Also called two-core balanced coaxial, it consists of two insulated wires and a shield (outer conductor) covering them for differential transmission.
Rated voltage
Rated voltage is the upper limit voltage for safe use of electronic devices and parts.
Rated current
The rated current of a connector is determined by the temperature rise caused by the current value when the connector is energized.
Resistance measurement
A technique for accurately measuring small resistances by minimizing the voltage drop in the leads by separating the current supply and voltage measurement loops. Accurate resistance measurements are possible because very little current flows through the leads to the voltmeter, which has a much higher internal resistance than the object being measured. This method is used to measure the contact resistance of connectors, etc.
Resistive loss
The energy loss when current flows through a resistor is I^2 x R.
low profile connector
Literally short connectors.
Differential mode
The two signals are in opposite phase, which is the main mode in the differential signal.
low dielectric material
A general term for materials with lower dielectric constant and dielectric loss tangent than general-purpose materials in the same field.
Dimple
Originally, it means "indentation" (ex. Dimple of a golf ball). However, in the case of connectors, although it is a little complicated, the structure that has a dimple on the back of the contact side of the terminal and a protrusion on the contact side that stabilizes the contact is called a "dimple contact", a "dimple structure", or simply a "dimple". There is a thing called, and it is established.
data rate
A parameter that indicates how much data is transmitted per second, expressed in bps = bit per second. The data rates supported by our products have recently changed from the era of hundreds of Mbps to Gbps, and as of 2020, we will release products that support up to 25 Gbps.
dual row type
A connector with two rows of terminals.
Delatch
It is a mechanism that releases a latch (lock) or releases a latch.
Voltage drop
This is a battery monitoring (management) system used to prevent overcharging and overdischarging of lithium-ion batteries used in automotive batteries.
voltage standing wave ratio
This is the voltage standing wave ratio, and is a parameter that indicates the relationship between the traveling wave and the reflected wave. It is essentially the same as Return Loss and can be converted using a fixed formula.
conductivity
A parameter that indicates the ease with which electricity can flow through a material, and is also called electrical conductivity.
coaxial connector
As the name suggests, it is a connector in the form of overlapping cylinders on the same axis, and the basic structure is that the central cylinder serves as the signal contact, and the outer cylinder is used as the ground or signal return path.
characteristic impedance
This is the input impedance when a transmission line or electronic component is regarded as a transmission line, and is determined by the current value generated against the input voltage in high-frequency signals (current value/voltage value).
inrush current
It is a momentary large current that is different from the steady state that occurs when a device is powered on or switched.
Top entry
This is the name of the type of pin header Socket.
tray packing
This packaging method is compatible with manual mounting and pick-and-place pick-and-place methods.
na line
Nyquist frequency
Originally, it is a sampling theorem in the digitization of analog signals, which means that "only half the sampling frequency can be reproduced".
Nylon
A type of plastic, it is a polymer made up of many monomers linked by amide bonds.
Nickel barrier
A structure applied to the solder tail to prevent excessive soldering rising.
Pullout contact
A contact shape formed on the "thickness" surface when a metal plate is punched into a terminal shape.
Vector network analyzer
An instrument that measures S-parameters in the frequency domain.
Ha line
Housing
Connector parts, mainly plastic parts.
Pattern prohibition area
When mounting components on a PCB, there are areas where circuit patterns cannot (or must not) be placed in order to avoid problems such as electrical shorts, and the range is usually specified for each component.
Back flip type
A type with a locking mechanism on the opposite side of the card slot (the cover rotates).
Paddle card
A printed circuit board may be used as an intermediary when connecting wires to a connector, and this circuit board is called a paddle card.
Power sum crosstalk
This is the most popular method for evaluating multiple crosstalk, and in the case of crosstalk interference from multiple lines, the sum of crosstalk power from each line is taken to measure the degree of crosstalk.
Bit error rate test
This is a test in which an actual digital signal is input to a certain transmission system or device and the frequency of errors for a certain period of time is checked.
Microsliding wear corrosion
This is a phenomenon in which the metal contact surfaces rub against each other very small due to vibrations, etc., and abrasion powder is generated, and corrosion progresses.
Pitch
The repeated spacing of the connector poles, i.e. the distance between the terminals. Defined as the center-to-center distance of the terminals.
skin effect
This is a phenomenon in which electric signals are concentrated on the surface side as the frequency increases. At high frequencies, this causes the effective cross-sectional area of the conductor to decrease and the resistance loss to increase. Also, as this skin effect progresses, resistive losses become more dependent on the surface area than the original cross-sectional area of the conductor.
pinyin paste
This is a reflow technology for dip-mounting products that conventionally require flow mounting.
Pin header
A Pin Header Connectors is the basic form of a plug (male side) connector in which a pin (conductor) made by cutting a wire material is supported by a housing (an insulator made of resin material). connection).
Female
It is primarily a connector with holes or gaps that accept mating contacts.
Sealing treatment
This is a process that closes the pinholes in the plating.
Blind beer
A via for connecting the board surface and the inner layer.
blind mate
A guiding structure is a structure in which the frontage of the housing is widened and the taper on the wall surface guides the connector toward the center, or an additional part called a guide pin is provided in order to facilitate the Mating of the connector.
plug
It is a connector on the sticking side, which mainly has contacts on the protrusion.
flip lock type
A type that unlocks by lifting the tip of the cover upward (the cover rotates).
printed circuit board
It is a general term for a board or film on which wiring is formed, and is also called a printed circuit board or printed board.
Frame rate
In video data, it is the number of frames processed per unit time. Normally, it is the number of processes per second, and fps = frames per second is used as a unit.
Flexible printed circuit
Printed circuit board = PCB (printed circuit board) is flexible as a base material, mainly polyimide, LCP, etc. is used to give flexibility, and it has intermediate properties between electric wires and substrates.
flexible flat cable
An FPC is manufactured by a method similar to electric wires, and is mainly made by arranging thin flat copper wires and laminating them with insulating tape from above and below in the longitudinal direction.
press fit
It is a method of mounting connectors and pin headers on the board, and is a soldering press-fitting method.
Fretting corrosion
This is a phenomenon in which the metal contact surfaces rub against each other very small due to vibrations, etc., and abrasion powder is generated, and corrosion progresses.
Floating structure (Floating structure)
A connector designed so that the connected Mating can Floating in all or any of the pitch direction, row direction, and Mating direction to absorb misalignment.
Floating Connector
IRISO' "Floating Connector" is a general term for connectors with Floating structure Floating move between rows and in the pitch direction (X-axis-Y-axis) by providing a Floating spring part in the terminal.
Front flip type
Compared to the slider cover type, this type has improved workability and size disadvantages. By occupying the cover that falls to the card side, it has a mechanism to hold down the card.
Stacking connection
Connection between straight type connectors (ST-ST). This name comes from the fact that when the cross section of the connected substrates is viewed from the side, the substrates are parallel to each other.
Beryllium copper
Copper alloy with added beryllium. It has excellent electrical properties, mechanical properties, and heat resistance, but tends to be more expensive than other spring materials because it uses rare metals.
Bellows contact
The word originally meant a bellows. When a metal plate is processed into a terminal shape, the bent part is used as a contact point along with securing the spring by bending. It is mainly used when the roll surface (plate plane) side is used as a point of contact.
hot plug
The connection is made while the equipment is in an energized state.
bottom entry
This is the name of the type of pin header Socket.
polybutylene terephthalate
It is one of the engineering plastics.
polyamide
A type of plastic, it is a polymer made up of many monomers linked by amide bonds.
Ma line
Mixed-mode S-parameters
S-parameters specified by replacing the differential/common mode input/output ports of two ports with an even number of ports of 4 or more.
It is a connector on the sticking side, which mainly has contacts on the protrusion.
Mezzanine
It is a word with the meaning of "two-story building", and it is one of the forms in which the sub-board is connected to the main board.
female
It is primarily a connector with holes or gaps that accept mating contacts.
And line
Effective Mating
It is the distance from when the contacts of the connector begin to make contact when Mating until the specified Mating state is reached.
Dielectric loss
It is a phenomenon in which the energy of an electric signal in a dielectric (insulator) is lost. The lost energy becomes heat.
Universal type
For products with a polarity key, the type that can be mated with any polarity of the Mating part is called a universal type.
Ra line
right angle type
A connector with a mating Mating facing perpendicular to the board.
rush current
It is a momentary large current that is different from the steady state that occurs when a device is powered on or switched.
Latch
A latch means a "latch" for a door, etc., and in the case of connectors, it refers to a locking mechanism.
Lance
It is a structure/mechanism that prevents the connector terminals from getting stuck after being inserted into the housing.
Land
It is a "metal island" that is applied around the via surface and is the part where components are soldering.
Rigid type (fixed connection)
A type of connector that does not Floating in the pitch direction, row direction, or Mating direction.
Return loss
It is expressed in dB by taking the ratio of the reflected wave to the input signal, and is also called return loss.
reflow dip
This is a reflow technology for dip-mounting products that conventionally require flow mounting.
Phosphor bronze
A copper alloy consisting of copper and tin, a kind of bronze.
Wa line
Wiping
It is the effect of removing foreign matter and oxide film by rubbing the terminals of the connector together when Mating.
Wire trap
A type of connector that is intended to be fixed and connected by mounting it on a board and inserting a wire whose tip has been stripped of insulation.
Wire Harness
It is a product that bundles wires for multiple wiring with a connector.