Patent ID: 8253223
Filing Date: 2012-08-28
Classification: H01L

Abstract:
1. A diode comprising: a P-type well formed in a semiconductor substrate; a first N-type impurity doping area formed in the P-type well; a second N-type impurity doping area formed in the P-type well; a first isolation area formed to surround the first N-type impurity doping area; a second isolation area formed to surround the second N-type impurity doping area; a first P-type impurity doping area formed to surround the first isolation area; a second P-type impurity doping area formed to surround the second isolation area; first contacts formed in the first N-type impurity doping area and the first P-type impurity doping area in a single row or a plurality of rows; and second contacts formed in the second N-type impurity doping area and the second P-type impurity doping area in a single row or a plurality of rows, wherein a distance between the second N-type impurity doping area and the second P-type impurity doping area is greater than a distance between the first N-type impurity doping area and the first P-type impurity doping area, and a contact pitch between the second contacts is greater than a contact pitch between the first contacts.