Patent ID: 8975662
Filing Date: 2015-03-10
Classification: H01L

Abstract:
1. A method of manufacturing a semiconductor device, the method comprising: providing source zones of a first conductivity type and body zones of a second conductivity type, which is the opposite of the first conductivity type, in a semiconductor die, the source zones adjoining a first surface of the semiconductor body; depositing a polycrystalline silicon material to form polysilicon plugs extending through openings in a dielectric layer adjoining the first surface, the polysilicon plugs being electrically connected to the source and the body zones; and providing an impurity source in contact with the deposited polycrystalline silicon material and distant to the first surface of the semiconductor die, the impurity source containing atoms of a metallic recombination element, and tempering the impurity source to diffuse atoms of the metallic recombination element from the impurity source through the polysilicon plugs into the semiconductor die such that the polysilicon plugs are not formed completely from silicide, wherein in the polysilicon plugs silicide crystallites are formed from the atoms of the metallic recombination element.