Via shielding for power/ground layers on printed circuit board

Details Via shielding for power/ground layers on printed circuit board Via shielding for power/ground layers on printed circuit board

2007-09-18

2007-09-18

Dinh, Tuan T. (Department: 2841)

Electricity: conductors and insulators

Conduits, cables or conductors

Preformed panel circuit arrangement

C174S265000, C174S266000

Reexamination Certificate

active

10888064

ABSTRACT:
A protective coating of insulating material is formed around a clearance hole in a conductive layer of a printed circuit board, so that the conductive material in a via within the clearance hole will not contact the conductive layer and create a short circuit. In one embodiment, the protective coating is sufficiently hard to deflect a drill bit being used to drill the via hole, thus protecting against misregistered drilled holes.

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