Patent ID: 9728460
Date: 2017-08-08
CPC Classifications: H01L

Claim:
1. A method of manufacturing a semiconductor device, comprising the steps of: (a) providing a semiconductor substrate having a first conductivity type; (b) forming a first semiconductor region having a second conductivity type different from the first conductivity type over a top of the semiconductor substrate; (c) forming a second semiconductor region having the first conductivity type and a third semiconductor region having the first conductivity type over a top of the first semiconductor region; and (d) dividing the semiconductor substrate into individual pieces, thereby forming a first semiconductor chip including a first transistor including the semiconductor substrate, the first semiconductor region, and the second semiconductor region, and a second semiconductor chip including a second transistor including the semiconductor substrate, the first semiconductor region, and the third semiconductor region; wherein area of the second semiconductor region is smaller than area of the third semiconductor region in plan view.