Patent ID: 9461116
Filing Date: 2016-10-04
CPC Classification: H01L

Claim Text:
1. A formation method of a TI-IGBT, comprising: providing a first semiconductor substrate; forming a first doped layer on an upper surface of the first semiconductor substrate; forming a second semiconductor substrate above the first semiconductor substrate, wherein the second semiconductor substrate completely covers the first doped layer and the first semiconductor substrate; and forming a short-circuit region and a collector region disposed in parallel in the first semiconductor substrate, wherein the first doped layer covers at least the collector region, a doping type of the first doped layer is the same as a doping type of the second semiconductor substrate, and a doping concentration of the first doped layer is lower than a doping concentration of the second semiconductor substrate, wherein forming the short-circuit region and the collector region disposed in parallel in the first semiconductor substrate comprises: thinning a lower surface of the first semiconductor substrate; forming the collector region by implanting P-type ions into the first semiconductor substrate; removing a part of the collector region in the first semiconductor region where the short-circuit region is to be formed; and forming the short-circuit region by implanting N-type ions into a part of the first semiconductor substrate where the short-circuit region is to be formed.