Patent ID: 7737521
Filing Date: 2010-06-15
Classification: H01L

Abstract:
1. A field effect power transistor having a cell array integrated in a semiconductor body, said cell array being structured into a multiplicity of cell array strips, said cell array strips comprising: a plurality of transistor cells, each transistor cell having a body region and a source electrode region, and at least one zone of said cell array strips including transistor cells having an increased W/L ratio of their channel width (W) to their channel length (L) compared with the other transistor cells of the cell array strips; and at least one temperature sensing device formed in a selected sense zone within the at least one zone of the cell array strips which includes the transistor cells having said increased W/L ratio, wherein the sense zone includes a sense trench situated between two adjacent ones of the cell array strips including the transistor cells having an increased W/L ratio of their channel width (W) of their channel length (U compared with the other transistor cells of the cell array strips.