Patent ID: 8426936

Claim:
A vertical Hall sensor, comprising: a substrate comprising semiconductor material of a first type of conductivity, the substrate having a main surface; a doped well of a second type of conductivity at the main surface, the doped well forming a sensor region extending perpendicularly to the main surface; contacts of the sensor region, the contacts being located on areas of the main surface and provided for application of an operation voltage; further contacts located on further areas of the main surface and provided for sensing a Hall voltage, the contacts and further contacts being arranged such that, in a presence of a magnetic field component parallel to the main surface and presence of a current through the sensor region generated by an operation voltage applied to the contacts, a Hall voltage that is generated is measurable via the further contacts; a pn-junction between the sensor region and the semiconductor material of the first type of conductivity, the sensor region having a higher doping at an area of the pn-junction that is remote from the main surface than at the main surface; and trenches confining the sensor region laterally with respect to the main surface.