Patent ID: 9224701
Filing Date: 2015-12-29
Classification: H01L

Abstract:
1. A device, comprising: a semiconductor substrate having a first surface opposite to a second surface; a first plurality of regions formed in the first surface of the substrate, the first plurality of regions having a first conductivity type, the first plurality of regions being separated from each other by a plurality of portions of the substrate; a second plurality of regions formed in the first surface of the substrate and positioned between ones of the first plurality of regions, the second plurality of regions having a second conductivity type, the second plurality of regions being arranged in an array of rows and columns, each of the second plurality of regions being separated from each other by the first plurality of regions and being aligned with the plurality of portions of the substrate; a plurality of terminals electrically coupled to the second plurality of regions; and a resistance detector coupled to the plurality of terminals and configured to detect a change in resistance between one of the terminals and a corresponding one of the plurality of portions of the substrate.