Patent ID: 8119496
Filing Date: 2012-02-21
Classification: H01L

Abstract:
1. A method of manufacturing a semiconductor device including the steps of: forming a plurality of diffused layers, a first main electrode and a control electrode on a first principal surface side of a semiconductor wafer; thinning the semiconductor wafer by grinding a second principal surface of the semiconductor wafer; forming a diffused layer and a second main electrode in contact with the diffused layer on the second principal surface side of the thinned semiconductor wafer; affixing the second main electrode to a supporting substrate with an adhesive layer in between; forming a trench reaching the diffused layer on the second principal surface side from the first principal surface side; forming on the whole area of the surface of the side wall of the trench an isolation layer having the same conductivity type as the diffused layer on the second principal surface side so that the isolation layer is in contact with the diffused layer on the second principal surface side; and removing the adhesive layer from the thinned semiconductor wafer to produce a plurality of semiconductor chips.