Patent ID: 8050046
Filing Date: 2011-11-01
Classification: H05K

Abstract:
1. An electrostatic discharge protection structure on a printed circuit board (PCB), for disposing an integrated circuit, the electrostatic discharge protection structure comprising: a ground ring having a ring inner area for disposing the integrated circuit, the ground ring having a plurality of sawtooth structures formed on the outer periphery of the ground ring, each of the sawtooth structures has a first sharp end extending outward; and a plurality of pads disposed around the outer periphery of the ground ring, wherein the first sharp ends of the sawtooth structures are adjacent to the pads correspondingly for utilizing the point discharge principle to prevent an ESD current, the sawtooth structures correspond to the pads on a one-to-one basis, the sharp end of each of the sawtooth structures is only spaced apart from the corresponding pad with a gap, and each of the pads has a second sharp end adjacent to the first sharp end of the corresponding sawtooth structure.