Through Connection
An electrical connection between conductive patterns on opposite sides of an insulating base, e.g. plated through-hole or clinched jumber wire.
Thermoset
A plastic cured or hardened by heating into a permanent shape. Thermosets cannot be re-melted.
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.
Thermocouple
A device made of two dissimilar metals which, when heated, generate a voltage that is used to measure temperatures.
Test Point
Special points of access to an electrical circuit, used for testing purposes.
Test Fixture
A device that adapts a specific assembly under test system via inter-connection.
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 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.
Terminal Area
A portion of a conductive pattern usually, but not exclusively, used for the connection and/or attachment of components.
Tenting
A printed board fabrication method of covering over plated through-holes and the surrounding conductive pattern with a resist, usually dry film.
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...
Temperature Profile
The depiction of the temperature that a selected point traverses as it passes through the re-flow process.
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...
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.
Surfactant
A chemical added to the cleaning solution to lower surface tension and to promote wetting.
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