The property of a fluid that enables it to develop and maintain a level of shearing stress dependent upon the velocity of flow and then offer continued resistance to flow. The absolute unit of viscosi...
Shiny Li
Jan 28,2016
2228 views
A virtual (computer model) representation of an electronic product that can be used to explore different design scenarios and then verify that the product will work as planned before building a physic...
Shiny Li
Jan 28,2016
2297 views
A plated through-hole used as an interlayer connection and not as a terminating point for a component lead. It may also be blind (incomplete penetration) or buried (non-surfacing).
Shiny Li
Jan 28,2016
2097 views
A plated through-hole whose only purpose is to connect a track on one layer or side of the board through to a track on another layer or side. In a via, there is no intention to insert a component lead...
Shiny Li
Jan 28,2016
2080 views
The solder re-flow process that uses a vaporized solvent as the source for heating the solder beyond its melting point,creating the component-to-board solder joint.
Shiny Li
Jan 28,2016
2075 views
A component handling tool with a small vacuum cup for ease of pick-up and removal during de-soldering.
Shiny Li
Jan 28,2016
1873 views
A hole containing no conductive material nor any other type of reinforcement.
Shiny Li
Jan 28,2016
1964 views
A logotype authorized for placement on a product which has been recognized (accepted) by Underwriters Laboratories, Inc. (UL).
Shiny Li
Jan 28,2016
935 views
A groove or excavation at one edge of a conductor caused by etching.
Shiny Li
Jan 28,2016
2205 views
Fluxless soldering wherein molten solder is vibrated at ultrasonic frequencies while making the joint.
Shiny Li
Jan 28,2016
1821 views
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
1489 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 th...
Shiny Li
Jan 28,2016
1433 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
1480 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
1563 views
The metallic conductive strips that provide connections between components, terminals, etc., on printed circuits.
Shiny Li
Jan 28,2016
1413 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
1489 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
1712 views
| Ranking | Name | Answers |
|---|---|---|
| 1 | _ Floppy Lab | 4 |
| 2 | PCBWay Team | 3 |
