Patent ID: 9343454
Filing Date: 2016-05-17
CPC Classification: H01L

Claim Text:
1. An electrostatic discharge protection structure, comprising: a substrate being of a first type of electrical conductivity; a well region in the substrate and being of a second type of electrical conductivity; a substrate contact region in the substrate and being of the first type of electrical conductivity; a well contact region in the well region and being of the second type of electrical conductivity; a substrate counter-doped region in the substrate, between the substrate contact region and the well contact region, and being of the second type of electrical conductivity; a well counter-doped region in the well region, between the substrate contact region and the well contact region, and being of the first type of electrical conductivity; a communication region at a lateral junction between the substrate and the well region and between the substrate counter-doped region and the well counter-doped region, the communication region in contact with the substrate and the well region; a first isolation region in the substrate and between the substrate counter-doped region and the communication region; a second isolation region in the well region and between the well counter-doped region and the communication region; an oxide layer adjacent to but not in contact with the communication region, the oxide layer configured such that: a field plate structure disposed on a side of the oxide layer, the side of the oxide layer facing away from the substrate.