- Pad :
The metal on the surface of a substrate or PWB through which the hole is drilled for a via connection, or the conductor point designed to be a test probe landing area.
- Peel-Away Speed :
The speed of lifting the stencil from the PCB after printing
- Percent Area Coverage :
The percentage of footprint area that has been covered by the printing process
- Pick & Place :
The method of certain placement equipment of picking components (mechanically or by vacuum) from tapes or magazines (etc.) and placing them in the correct position of the PCB.
- Pitch :
The distance between a feature and the adjacent feature on the same component.
- Placement Machine :
(Automatic) equipment used to mount components onto a PCB
- Plastic flat-pack :
A FP with the body made with plastic
- PLCC (PCC) :
Plastic Leaded Chip Carrier (Plastic Chip Carrier). A plastic IC package for surface mounting applications that has leads, generally "J" leads, on all four sides.
- Poise :
Unit of viscosity. It is one for a liquid that requires the force of one dyne to be moved from a one square centimeter surface area with velocity of one centimeter per second.
- Polymers :
A class of chemical whose main feature are the long chains of molecules. Epoxies and other resins are polymers
- Preheat :
it evaporates the solvent component of the flux (95 to 99% of its action takes place right in the wave). Its main function is to raise the board’s temperature.
- Preproduction Test Board :
An assembly that is to determine whether a sub-contractor is able to build the product in large runs.
- Primer :
A first coating that is applied to improve the holding strength of an adhesive
- Print Head :
That part of a printer that contains all the elements for holding the squeegee
- Printed Circuit Board [PCB] :
General designation of the support structure of an electronic assembly. Also referred to as a PWB [Printed Wire Board]. It consists essentially of a dielectric material (the substrate) onto which metallic conductors have been applied (etched copper foil and additional plating) to reflect the electronic circuit.
- Pyrometer :
IR detector to measure the temperature of the board