Unit 1: Edges of Printed Circuit Boards
The edges of printed circuit boards include the outer edge, the inner milled edge, and the edge of non-plated holes, which are one of the items for visual inspection. Common defects include burr, nick, haloing, crazing, delamination, and blister. Burr: Irregular protrusions or edges on the edges of printed boards caused by processes such as … Read more
