Patent ID: 9293424
Filing Date: 2016-03-22
CPC Classification: H01L

Claim Text:
1. A semiconductor structure for electrostatic discharge protection, arranged on an integrated circuit, the integrated circuit comprising a seal ring arranged at outer periphery of the integrated circuit, a metal ring arranged at an inner side of the seal ring, and a power bus arranged at a side of the metal ring, the semiconductor structure comprising: a first P type electrode area formed at a position on a P well corresponding to the seal ring, and coupled to the seal ring; a second P type electrode area formed at a position on the P well corresponding to the metal ring, and coupled to the metal ring; and a first N type electrode area formed at a position corresponding to the power bus, and coupled to the power bus; wherein the seal ring and the metal ring are coupled to ground, and the power bus is coupled to a voltage source.