Patent ID: 9368613
Filing Date: 2016-06-14
CPC Classification: H01L

Claim Text:
1. A method for manufacturing the semiconductor device, comprising: forming a polysilicon layer on an insulating film; implanting phosphorus ions into the polysilicon layer and performing a first heat treatment to form a first-conductivity-type semiconductor layer; and selectively implanting boron ions and arsenic ions into regions of the first-conductivity-type semiconductor layer so as to form separated, different implanted regions and performing a second heat treatment of the separated, different implanted regions to form a plurality of third semiconductor regions and a plurality of first semiconductor regions, which reach the insulating film through the first-conductivity-type semiconductor layer in a depth direction and have a higher impurity concentration than the first-conductivity-type semiconductor layer, the plurality of third semiconductor regions and the plurality of first semiconductor regions being separated from each other by regions of the first-conductivity-type semiconductor layer that are not implanted with the boron ions and the arsenic ions, wherein an end of the polysilicon layer comprises a first semiconductor region among the plurality of first semiconductor regions.