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...
Shiny Li
Jan 20,2016
2991 views
A condition that makes breaks or separations in coatings that extends through to an underlying surface.
Shiny Li
Jan 20,2016
501 views
An outer layer(s) of insulating material applied over the conductive pattern on the surface of the printed board.
Shiny Li
Jan 20,2016
874 views
One of the patterns of the quality conformance test circuitry area. (See: also Test Coupon).
Shiny Li
Jan 20,2016
498 views
A smear or stain on the board representing flux residue after soldering and a variation from conventional appearance.
Shiny Li
Jan 20,2016
1154 views
Materials of inorganic acids and salts for surfaces of difficult solderability. Also called acid fluxes.
Shiny Li
Jan 20,2016
534 views
Marks placed inside the edges of PCB corners to align and register the layers.
Shiny Li
Jan 20,2016
490 views
A corrosivity test for fluxes in which the compound’s reaction to a copper film vacuum-deposited on a glass plate is noted.
Shiny Li
Jan 20,2016
529 views
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...
Shiny Li
Jan 20,2016
535 views
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.
Shiny Li
Jan 20,2016
515 views
A procedure in which voltage is applied to two interconnected lands to ascertain the presence or absence of current flow.
Shiny Li
Jan 20,2016
496 views
An impurity or foreign substance whose presence on printed wiring assemblies could electrolytically, chemically, or galvanically corrode the system.
Shiny Li
Jan 20,2016
0 views
The distance between the centre lines of adjacent contact areas.
Shiny Li
Jan 20,2016
435 views
The electrical resistance of the metallic surfaces at their interface in the contact area under specified conditions.
Shiny Li
Jan 20,2016
526 views
The common area between a conductor and a connector through which the flow of electricity takes place.
Shiny Li
Jan 20,2016
613 views
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...
Shiny Li
Jan 20,2016
580 views
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.
Shiny Li
Jan 20,2016
628 views
A thin dielectric cover brushed, dipped or sprayed over parts and circuits of PCBs for environmental and mechanical protection.
Shiny Li
Jan 20,2016
514 views
A single conductive path in conductive pattern. A PCB has at least one layer of conductors. Synonyms: path, trace.
Shiny Li
Jan 20,2016
585 views
The observable width of the pertinent conductor at any point chosen at random on the printed board, normally viewed from vertically above unless otherwise specified.
Shiny Li
Jan 20,2016
473 views
| Ranking | Name | Answers |
|---|---|---|
| 1 | _ Floppy Lab | 4 |
| 2 | PCBWay Team | 3 |
