A condition existing in the base material in the form of connected white spots or “crosses” on or below the surface of the base material, reflecting the separation of fibres in the glass cloth and con...
A condition that makes breaks or separations in coatings that extends through to an underlying surface.
An outer layer(s) of insulating material applied over the conductive pattern on the surface of the printed board.
A smear or stain on the board representing flux residue after soldering and a variation from conventional appearance.
Materials of inorganic acids and salts for surfaces of difficult solderability. Also called acid fluxes.
A corrosivity test for fluxes in which the compound’s reaction to a copper film vacuum-deposited on a glass plate is noted.
Quality electrolytic copper used to form conductive patterns on printed circuits. It is available in a number of weights (thickness) the traditional weights are 0.5, 1 and 2 ounces per square foot. (1...
A material, usually supplied in large sheets, consisting of a base material to one or both sides of which a thin copper foil is boned. Synonym: laminate.
A procedure in which voltage is applied to two interconnected lands to ascertain the presence or absence of current flow.
An impurity or foreign substance whose presence on printed wiring assemblies could electrolytically, chemically, or galvanically corrode the system.
The electrical resistance of the metallic surfaces at their interface in the contact area under specified conditions.
The common area between a conductor and a connector through which the flow of electricity takes place.
A protrusion of the Printed Circuit Board edge that is manufactured to a configuration to mate with a receptacle that provides electrical and/or mechanical junction between the Printed Circuit Board a...
One plug or receptacle which can be easily joined to or separated from its mate. Multiple-contact connectors join two or more conductors with others in one mechanical assembly.
A thin dielectric cover brushed, dipped or sprayed over parts and circuits of PCBs for environmental and mechanical protection.
A single conductive path in conductive pattern. A PCB has at least one layer of conductors. Synonyms: path, trace.
Ranking | Name | Answers |
---|---|---|
1 | _ Floppy Lab | 4 |
2 | PCBWay Team | 3 |