Underwriter’s Laboratories, Inc., a corporation for the purpose of establishing safety standards on types of equipment or components in USA and Canada.
The deformation of a rectangular sheet, panel or printed board, that occurs parallel to a diagonal across its surface in such a way that one of the comers of the sheet is not in the plane formed by th...
Dielectric material with higher glass transition temperature and better thermal stability than epoxy resin, however, more expensive and not in common use.
A signal-carrying circuit composed of conductors and dielectric material with controlled electrical characteristics used for the transmission of high-frequency or narrow-pulse type signals.
The metallic conductive strips that provide connections between components, terminals, etc., on printed circuits.
A soldering defect in which a chip component moves into a vertical position during solidification of the solder so that only one terminal is connected. It is caused by defective re-flow processing.
Also called fabrication hole, pilot hole, or manufacturing hole. These are used as PCB reference points upon which other dimensions are based.
An electrical connection between conductive patterns on opposite sides of an insulating base, e.g. plated through-hole or clinched jumber wire.
A plastic cured or hardened by heating into a permanent shape. Thermosets cannot be re-melted.
A plastic set into final shape by forcing the melted polymer into a cooled mould. The hardened form can be re-melted several times.
A device made of two dissimilar metals which, when heated, generate a voltage that is used to measure temperatures.
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...
Ranking | Name | Answers |
---|---|---|
1 | PCBWay Team | 5 |