PCB Glossary

Through Connection

An electrical connection between conductive patterns on opposite sides of an insulating base, e.g. plated through-hole or clinched jumber wire.

Through Connection

PCB Glossary

Thermoset

A plastic cured or hardened by heating into a permanent shape. Thermosets cannot be re-melted.

Thermoset

PCB Glossary

Thermoplastic

A plastic set into final shape by forcing the melted polymer into a cooled mould. The hardened form can be re-melted several times.

Thermoplastic

PCB Glossary

Thermocouple

A device made of two dissimilar metals which, when heated, generate a voltage that is used to measure temperatures.

Thermocouple

PCB Glossary

Test Point

Special points of access to an electrical circuit, used for testing purposes.

Test Point

PCB Glossary

Test Pattern

A pattern used for inspection or testing purposes.

Test Pattern

PCB Glossary

Test Fixture

A device that adapts a specific assembly under test system via inter-connection.

Test Fixture

PCB Glossary

Test Coupon

A pattern as an integral part of the PCB on which electrical tests may be made to non-destructively evaluate process control. A portion of a circuit used exclusively to functionally test the circuit a...

Test Coupon

PCB Glossary

Test Board

A printed board suitable for determining acceptability of the board or of a batch of boards produced with the same process so as to be representative of the production board.

Test Board

PCB Glossary

Terpenes

(Turpentine)A solvent used in cleaning electrical assemblies.

Terpenes

PCB Glossary

Termination

The part of component that makes contact with a pad on a substrate.

Termination

PCB Glossary

Terminal Area

A portion of a conductive pattern usually, but not exclusively, used for the connection and/or attachment of components.

Terminal Area

PCB Glossary

Tenting

A printed board fabrication method of covering over plated through-holes and the surrounding conductive pattern with a resist, usually dry film.

Tenting

PCB Glossary

Tented Via

A via with solder mask completely covering both its pad and its plated through-hole. This completely insulates the via from foreign objects, thus protecting against accidental shorts, but it also rend...

Tented Via

PCB Glossary

Temperature Profile

The depiction of the temperature that a selected point traverses as it passes through the re-flow process.

Temperature Profile

PCB Glossary

Teflon

Du Pont trade name as an inventor for PTFE(Polytetrafluoroethylene).

Teflon

PCB Glossary

Taped Components

Components attached to continuous tape for automatic assembly.

Taped Components

PCB Glossary

Tape-and-reel

A packaging method of housing surface-mount parts in their own tape cavities in a long continuous strip. The cavities are covered so that the tape can be wound around a reel for convenient handl...

Tape-and-reel

PCB Glossary

Swaged Lead

A component lead wire that extends through a hole in a printed board and its lead extension is flattened(swaged)to secure the component to the board during manufacturing operations.

Swaged Lead

PCB Glossary

Surfactant

A chemical added to the cleaning solution to lower surface tension and to promote wetting.

Surfactant

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