Patent ID: 7939882

Claim:
A semiconductor device, comprising: a main field effect transistor (FET) including a source, a body and a gate; a sense FET including a source, a body and a gate, wherein a transistor portion of the sense FET is substantially surrounded by and proximate to transistors of the main FET; a sense FET source pad located at an edge of the semiconductor device wherein the sense FET source pad is spaced apart from the transistor portion of the sense FET and is connected to the transistor portion of the sense FET by a sense FET probe metal; and an electrical isolation structure configured to electrically isolate source and body regions of the main FET from source and body regions of the sense FET, wherein the main FET, the sense FET, and the electrical isolation are formed in a single semiconductor die and wherein the isolation structure is configured such that the transistor portion of the sense FET and the sense FET source pad are located outside an active area of the main FET, wherein the semiconductor device is a discrete vertical FET.