Semiconductor device manufacturing: process – Bonding of plural semiconductor substrates
Reexamination Certificate
2004-09-08
2008-11-04
Lee, Hsien-ming (Department: 2823)
Semiconductor device manufacturing: process
Bonding of plural semiconductor substrates
C438S458000, C257SE21568, C257SE21570
Reexamination Certificate
active
07446016
ABSTRACT:
A bonded SOI substrate having an active layer which is free from crystal defects is obtained by adding more than 9×1018atoms/cm3of boron to a wafer for active layer (10). Since the boron concentration in the wafer for active layer is high, a silicon oxide film is formed at a high rate. Consequently, there can be obtained a Smart-Cut wafer with high throughput. Furthermore, damages to the active layer due to the ion implantation can be reduced, thereby improving the quality of the active layer.
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Endo Akihiko
Morimoto Nobuyuki
Greenblum & Bernstein P.L.C.
Lee Hsien-ming
SUMCO Corporation
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