Patent ID: 8106305
Filing Date: 2012-01-31
Classification: H05K,Y10T

Abstract:
1. A print circuit board, comprising: a first surface; a guard plane disposed on an inner layer of the print circuit board; a high insulated region formed on the first surface of the print circuit board so as to be opposed to the guard plane, the high insulated region being substantially surrounded by one or more first guard patterns; and a quasi-high insulated region formed on the first surface of the print circuit board so as to be disposed adjacent to the high insulated region, the quasi-high insulated region being substantially surrounded by at least a part of the one or more first guard patterns and by one or more second guard patterns, wherein the one or more first guard patterns and the one or more second guard patterns are each formed by forming one or more trenches in the first surface of the print circuit board so as to expose the guard plane on a bottom surface of the one or more trenches.