Positive-acting Resist

A resist which is decomposed (softened) by light and which, after exposure and development, is removed from those&n...

Positive-acting Resist

Positive (noun)

An artwork, artwork master, or production master in which the intended conductive pattern is opaque to light, and&n...

Positive (noun)

Populated PCB

A printed board on to which all passive and active components have been assembled. Synonyms: printed board assembly...

Populated PCB

Polyimide

(kapton) Higher melting point plastic film used as base for flexible portions of flexi-rigid boards as well as ...

Polyimide

Polyimide Resins

High temperature thermoplastics used with glass to produce printed circuit laminates from multi-layer and other circuit ...

Polyimide Resins

Polyester

(mylar) low melting point plastic film used for cheap flexible circuits.

Polyester

Polarization

 A technique of eliminating symmetry within a plane so that parts can be engaged in only one way in ...

Polarization

Poise

A centimeter-gram-second unit of viscosity equal to that of a fluid requiring a shearing force of one dyne to&...

Poise

Plotting

The practice of mechanically converting X - Y position information into a visual pattern, such as artwork.

Plotting

Plating

A uniform coating of conductive metal upon the base material of the printed circuit board.

Plating

Plating Up

The process consisting of the electrochemical deposition of a conductive material on the base material (surface holes, etc.) after the base material has been made conductive.

Plating Up

Plating Resists

Materials which, when deposited on conductive areas, prevent the plating of the covered areas. Resists are available both as screened-on materials and as dry-film photopolymer resists.

Plating Resists

Plating Bar

The temporary conductive path interconnecting areas of a printed board to be electroplated, usually located on the panel outside the borders of such a board.

Plating Bar

Plated Through-hole

A hole with the deposition of metal (usually copper) on its sides to provide electrical connections between internal or external conductive patterns.

Plated Through-hole

Plate Finish

Pertaining to Laminating. The finish present on the metallic surface of metal clad base material resulting from direct contact with the laminating press plates without modification by any subsequent f...

Plate Finish

Pitting

Small holes or sharp edges on the surface of a solder joint generally caused by flux entrapment, oxidation or over-heating.

Pitting

Pit

A depression in the conductive layer that does not penetrate entirely through it.

Pit

Pink Ring

Chemically-induced fracturing or de-lamination on or below the surface of the base material; it is usually exhibited by a light area around holes, other etched areas or both.

Pink Ring

Pinholes

Small imperfection which penetrate entirely through the conductor and/or solder.

Pinholes

Pinhole

A minute hole through a layer of pattern.

Pinhole

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Ranking Name Answers
1 PCBWay Team 6
2 Engineer 1
3 Stephen Newport 1
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