Semiconductor device manufacturing: process – Making field effect device having pair of active regions...
Reexamination Certificate
2006-12-22
2008-05-20
Lebentritt, Michael (Department: 2812)
Semiconductor device manufacturing: process
Making field effect device having pair of active regions...
C438S151000, C438S154000, C438S199000, C438S300000, C438S302000, C257S315000, C257SE21427, C257SE21703
Reexamination Certificate
active
07374975
ABSTRACT:
A method of forming a transistor reduces leakage current and hot carrier effects, and therefore improves current performance. The method of forming a transistor includes selectively etching the semiconductor substrate to form a substrate protrusion and expose a buried source/drain implant region. A gate insulating layer covers the substrate protrusion and the first source/drain region. A gate conductor layer is selectively etched to form a gate pattern covering the sidewalls of the substrate protrusion and a portion of the semiconductor substrate adjacent to the sidewalls of the substrate protrusion. A second source/drain region is stacked over the top of the substrate protrusion. Contacts connected to the gate pattern and the first and second source/drain regions.
REFERENCES:
patent: 2005/0139911 (2005-06-01), Kim
patent: 2005/0142730 (2005-06-01), Kim
patent: 2006/0263985 (2006-11-01), Kang et al.
Ahmadi Mohsen
Dongbu Hi-Tek Co., Ltd.
Sherr & Nourse, PLLC
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