A screening defect characterized by prints having jagged edges, the result of incorrect moving pressure.
Shiny Li
Jan 28,2016
858 views
The process of immersing printed circuit boards into hot liquids. Often referred to as HASL or HAL (Hot Air Levelling).
Shiny Li
Jan 28,2016
903 views
A preferable concave surface of solder that is at the interconnection of the metal surfaces of a solder connection.
Shiny Li
Jan 28,2016
996 views
A small hole that penetrates from the surface of a solder connection to a void of indeterminate size within the solder connection (process indicator).
Shiny Li
Jan 28,2016
1013 views
The unwanted formation of a conductive path of solder between conductors.
Shiny Li
Jan 28,2016
866 views
A metal alloy with a melting temperature that is below 450℃.
Shiny Li
Jan 28,2016
819 views
The period after pre-heat and before re-flow peak temperature where the internal temperature differences between parts allowed to equalize.
Shiny Li
Jan 28,2016
979 views
The return of a stencil to normal level after deflection by the pressure of the squeegee moving across the surface.
Shiny Li
Jan 28,2016
1290 views
The space between the top surface of the substrate and the underside of the stencil when the squeegee is not in play.
Shiny Li
Jan 28,2016
1154 views
Surface Mount Technology. Defines the entire body of processes and components which create printed circuit assemblies without components with leads that pierce the board.
Shiny Li
Jan 28,2016
868 views
Resin, smeared over the edge of an internal copper layer of a multi-layer board during drilling, which prevents the layer from making electrical contact with the barrel of the hole.
Shiny Li
Jan 28,2016
1812 views
Surface Mounted Device. Any component or hardware element designed to be mounted to a printed circuit board (PCB) without penetrating the board.
Shiny Li
Jan 28,2016
992 views
A spreading of the solder paste after printing but before re-flow soldering. If excessive, a loss of definition may result.
Shiny Li
Jan 28,2016
993 views
A production master used in the process of making a single printed board.
Shiny Li
Jan 28,2016
756 views
A printed board with a conductive pattern on one side only.
Shiny Li
Jan 28,2016
868 views
The process of creating a virtual representation(a computer model)of an electronic component, circuit board, or system and applying virtual test signals to the model to verify its functionality and po...
Shiny Li
Jan 28,2016
812 views
Often used for legend print and means the printed reference designators on a printed wiring boards.
Shiny Li
Jan 28,2016
1131 views
An electrical impulse of a pre-determined voltage, current, polarity and pulse width.
Shiny Li
Jan 28,2016
946 views
A conductor layer intended to carry signals, rather than serve as a ground or other fixed voltage function.
Shiny Li
Jan 28,2016
792 views
| Ranking | Name | Answers |
|---|---|---|
| 1 | PCBWay Team | 5 |
