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The Surface Wettability of Circuit Board SMT Chip Processing You are here:

Surface wetting of SMT chip proofing refers to a phenomenon when the solder spreads and covers the surface of the metal to be soldered during sold...

Printed Circuit Boards Glossary:Design,Fabrication and Assembly-Z

Z-Stroke The movement of the head of a component placement machine in the vertical place for parts orientation and insertion.

Printed Circuit Boards Glossary:Design,Fabrication and Assembly-Y

Yield The ratio of usable parts at the end of a manufacturing process to the number of components submitted for processing.

Printed Circuit Boards Glossary:Design,Fabrication and Assembly-W

Wicking Capillary absorption of liquid along the fibres of the base material. Whisker A needle-shaped metallic growth on a printed circuit board. W...

Printed Circuit Boards Glossary:Design,Fabrication and Assembly-V

Voltage Plane A conductor or portion of a conductor layer on or in a printed board which is maintained at other than ground potential. It can also ...

Printed Circuit Boards Glossary:Design,Fabrication and Assembly-U

Unsupported Hold A hole containing no conductive material nor any other type of reinforcement. Underwriters’ Symbol A logotype authorized for place...

Printed Circuit Boards Glossary:Design,Fabrication and Assembly-T

Twist 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 ...

Printed Circuit Boards Glossary:Design,Fabrication and Assembly-S

Swaged Lead A component lead wire that extends through a hole in a printed board and its lead extension is flattened(swaged)to secure the component...

Printed Circuit Boards Glossary:Design,Fabrication and Assembly-R

Rosin  A hard, natural resin (nowadays also synthetic),consisting of abietic and primaric acids and their isomers, some fatty acids and terpene hyd...

Printed Circuit Boards Glossary:Design,Fabrication and Assembly-P

PWB Printed Wiring Board; same as PCB. Pull Strength See Bond Strength. PTH Plated through-holes. Plating the holes on their internal wall. Product...

Printed Circuit Boards Glossary:Design,Fabrication and Assembly-O

Overhang Increase in printed circuit conductor width caused by plating build-up or by undercutting during etching. Outgrowth The increase in conduc...

Printed Circuit Boards Glossary:Design,Fabrication and Assembly-N

NPTH Non plated though-hole. Non-wetting A condition whereby a surface has contacted molten solder, but has had none of the solder adhere to it. No...