Patent ID: 7573103
Filing Date: 2009-08-11
Classification: H01L

Abstract:
1. A protection device, comprising: a well of n-type material formed in a p-type substrate; a well of p-type material formed in the well of n-type material; a first n-type region formed in the well of p-type material in direct physical contact with the well of p-type material, where the first n-type region is coupled to an other device; a first p-type region formed in the well of p-type material; a second p-type region formed in the well of n-type material in direct physical contact with the well of n-type material, the second p-type region being electrically connected to the first p-type region via a metal line; and a second n-type region formed in the well of n-type material, where charge flows from the other device to ground through the first n-type region, the well of p-type material, the first p-type region, the metal line, the second p-type region, the well of n-type material, and the second n-type region.