Patent ID: 9285439
Filing Date: 2016-03-15
CPC Classification: G01R,H01L

Claim Text:
1. A vertical Hall sensor comprising: a first vertical Hall effect region formed in a semiconductor substrate, with a first plurality of contacts arranged at one side of the first vertical Hall effect region; a second vertical Hall effect region formed in the semiconductor substrate and of a same doping type as the first vertical Hall effect region, with a second plurality of contacts arranged at one side of the second vertical Hall effect region, wherein the second vertical Hall effect region is connected in series with the first vertical Hall effect region regarding a power supply to the first and second vertical Hall effect regions; a first layer adjacent to the first vertical Hall effect region at a side other than a side of the first plurality of contacts, having different doping properties than the first vertical Hall effect region, and insulating the first vertical Hall effect region from a bulk of the semiconductor substrate by at least one reverse-biased p-n junction during an operation of the vertical Hall sensor; and a second layer adjacent to the second vertical Hall effect region at a side other than a side of the second plurality of contacts, having different doping properties than the second vertical Hall effect region, and insulating the second vertical Hall effect region from a bulk of the semiconductor substrate by at least one reverse-biased p-n junction during an operation of the vertical Hall sensor, wherein the first layer is adjacent to and distinct from the bulk of the semiconductor substrate at a side of the first vertical Hall effect region opposite to the one side at which the first plurality of contacts is arranged and wherein the second layer is adjacent to and distinct from the bulk of the semiconductor substrate at a side of the second vertical Hall effect region opposite to the one side at which the second plurality of contacts is arranged, and wherein the first layer has another doping type than the first vertical Hall effect region.