Semiconductor device manufacturing: process – Introduction of conductivity modifying dopant into... – Ion implantation of dopant into semiconductor region
Patent
1995-12-21
1998-11-17
Dang, Trung
Semiconductor device manufacturing: process
Introduction of conductivity modifying dopant into...
Ion implantation of dopant into semiconductor region
438530, 438526, 438514, H01L 21425
Patent
active
058375970
ABSTRACT:
A method of manufacturing a semiconductor device in which a first ion implantation is carried out into a semiconductor substrate. Then, a second ion implantation is carried out to a projection range deeper than that of the first ion implantation. The ions of the second implantation are formed from the same type of atoms constituting the semiconductor substrate or from impurity atoms having the same conduction type as the semiconductor substrate at the projection range of the second ion implantation. A further ion implantation may be carried out to electrically shield the second implantation, or the method may be carried out in a SOI substrate with the second implantation extending through the insulating layer of the SOI structure.
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T. Shibata et al., "Formation of Ultra-Shallow Low-Reverse Current n+p Junctions by 450.degree.C. Furnace Annealing", IEEE 1990, pp. 63 and 64.
Dang Trung
NEC Corporation
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