RIGID LAMINATE
A rigid printed wiring board is a board construction method using only rigid base materials to produce what is classically know as a printed wiring board (PWB).
The printed board may be single-sided, double-sided with or without plated-through holes, multi-layer with plated-through holes, multilayer with or without buried/blind vias and metal core.
See Section 5.01 "Printed Wiring Board, General Requirements", for common accept/reject criteria.
GENERAL REQUIREMENTS
Board is clean, flat and damage-free. Conductive patterns are sharply defined. Plating and solder mask are of uniform color and finish, holes are properly located, markings are sharply defined and aligned, and electrical/solder termination areas are bright and shiny.
PREFERRED
SUPPORTED HOLES
Supported/plated-through holes (PTH) designated for lead insertion exhibit a smooth/even bore and plating, proper diameter, are free of resist and have symmetrical annular rings.
Best Workmanship Practice
PREFERRED
UNSUPPORTED HOLES
Unsupported/non-plated-through holes (NPTH) exhibit smooth/even walls, proper diameter, are free of plating and have symmetrical annular rings.
Best Workmanship Practice
PREFERRED
SURFACE MOUNT TERMINATION PADS
Electrical/solder termination areas are clean, bright and shiny. Solder mask is of uniform color, finish and orientation. Markings are sharply defined and properly aligned.
Best Workmanship Practice
