Shiny Li
Jan 28,2016
350
Mass Soldering
Methods of soldering in which many joints are made in the same operation.
Shiny Li
Jan 28,2016
279
Mask
A material applied to enable selective etching, plating or the application of solder to a printed circuit board.
Shiny Li
Jan 28,2016
480
Margin
The distance between the reference edge of a flat cable and the nearest edge of the first conductor.(See also Edge Spacing)
Shiny Li
Jan 28,2016
490
MAR(Minimum Annular Ring)
The minimum metal width, at the narrowest point between the circumference of the hole and the outer circumference of the land. This measurement is made to the drilled hole on internal layers of multi-...
Shiny Li
Jan 28,2016
495
Manhattan Distance
The orthogonal distance between two points.
Shiny Li
Jan 28,2016
307
Major Defect
A defect that could result in failure or significantly reduce the usability of the part for its intended purpose.
Shiny Li
Jan 28,2016
371
Logic diagram
A drawing that depicts the multi-state device implementation of logic functions with logic symbols and supplementary notations, showing details of signal flow and control, but not necessarily the poin...
Shiny Li
Jan 28,2016
905
Locating Hole, Locating Notch, Locating Slot
A hole,notch or slot in the panel or printed board to enable it to be positioned accurately during manufacture and/or assembly. Synonyms: fabrication hole (or notch or slot),indexing hole, location ho...
Shiny Li
Jan 28,2016
428
Locating Edge, Locating Hole, Locating Notch, Locating Slot
A physical feature in a panel or printed board used to position the board or mounted components accurately.
Shiny Li
Jan 28,2016
353
Load Test
A mass re-flow soldering system test for the capacity repeatedly to process boards regardless of their volume though the oven.
Shiny Li
Jan 28,2016
393
Liquids
The lowest temperature at which filler metal (solder) is completely liquid.
Shiny Li
Jan 28,2016
344
Liquation
If a solder alloy with a long melting range is heated too slowly. the phase with the lowest melting point begins to flow first. The material left behind has a changed composition and a higher melting ...
Shiny Li
Jan 28,2016
350
Lifted Land
A land that has fully or partially separated (lifted)from the base material, whether or not any resin is lifted with land.
Shiny Li
Jan 28,2016
354
Legend
A format of lettering or symbols on the printed board, e.g. Part number, component locations, and patterns.
Shiny Li
Jan 28,2016
294
Lead Projection
The distance that a component lead protrudes through the side of a board that is opposite from the one upon which the component is mounted.
Shiny Li
Jan 28,2016
279
Layer
One in a series of levels in a board on which tracks are arranged to connect components. Vias connect tracks and zones between layers.
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