Underwriter’s Laboratories, Inc., a corporation for the purpose of establishing safety standards on types of equipment or components in USA and Canada.
Shiny Li
Jan 28,2016
297 views
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 the other three corners.
Shiny Li
Jan 28,2016
308 views
Dielectric material with higher glass transition temperature and better thermal stability than epoxy resin, however, more expensive and not in common use.
Shiny Li
Jan 28,2016
293 views
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.
Shiny Li
Jan 28,2016
312 views
The metallic conductive strips that provide connections between components, terminals, etc., on printed circuits.
Shiny Li
Jan 28,2016
324 views
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.
Shiny Li
Jan 28,2016
293 views
Also called fabrication hole, pilot hole, or manufacturing hole. These are used as PCB reference points upon which other dimensions are based.
Shiny Li
Jan 28,2016
293 views
The application of molten solder to a basis metal in order to increase its solderability.
Shiny Li
Jan 28,2016
300 views
An electrical connection between conductive patterns on opposite sides of an insulating base, e.g. plated through-hole or clinched jumber wire.
Shiny Li
Jan 28,2016
305 views
A plastic cured or hardened by heating into a permanent shape. Thermosets cannot be re-melted.
Shiny Li
Jan 28,2016
280 views
A plastic set into final shape by forcing the melted polymer into a cooled mould. The hardened form can be re-melted several times.
Shiny Li
Jan 28,2016
314 views
A device made of two dissimilar metals which, when heated, generate a voltage that is used to measure temperatures.
Shiny Li
Jan 28,2016
294 views
Special points of access to an electrical circuit, used for testing purposes.
Shiny Li
Jan 28,2016
283 views
A device that adapts a specific assembly under test system via inter-connection.
Shiny Li
Jan 28,2016
303 views
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 as a whole.
Shiny Li
Jan 28,2016
483 views
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.
Shiny Li
Jan 28,2016
452 views
| Ranking | Name | Answers |
|---|---|---|
| 1 | PCBWay Support | 10 |
| 2 | S****qui | 2 |
| 3 | А**рей | 1 |
| 4 | J*das | 1 |
| 5 | Engineer | 1 |
