Patent ID: 9136352
Filing Date: 2015-09-15
Classification: H01L

Abstract:
1. A manufacturing method of a semiconductor apparatus, comprising: forming a first insulating film on a top side of a substrate having a first semiconductor region of a first conductivity; selectively forming a shielding film element through an opening in the first insulating film; forming a control electrode on the first insulating film, apart from the shielding film element; forming a second semiconductor region of a second conductivity in the first semiconductor region using the shielding film element and the control electrode as a mask and selectively forming a third semiconductor region of the first conductivity in a surface layer of the second semiconductor region using again the shielding film and the control electrode as the mask; forming a second insulating film to cover the control electrode and removing the shielding film element; forming a first electrode to contact the third semiconductor region and to be insulated from the control electrode by the second insulating film; and forming a second electrode on a side of the substrate, wherein at least a portion of the control electrode is disposed over a part of the second semiconductor region that is sandwiched between the first semiconductor region and the third semiconductor region.