Semiconductor device manufacturing: process – Coating with electrically or thermally conductive material – To form ohmic contact to semiconductive material
Reexamination Certificate
2008-04-08
2008-04-08
Clark, S. V. (Department: 2823)
Semiconductor device manufacturing: process
Coating with electrically or thermally conductive material
To form ohmic contact to semiconductive material
C438S488000
Reexamination Certificate
active
11091414
ABSTRACT:
A film formation method for a semiconductor process is arranged to form an amorphous silicon film on a target substrate by CVD in a process field within a reaction container, while supplying a first process gas containing silicon into the process field, and setting the process field at a first temperature of 550° C. or more and at a first pressure. The method is arranged to subsequently poly-crystallize the amorphous silicon film by a heat process in the process field to form a poly-silicon film, while supplying a second process gas different from the first process gas into the process field, and setting the process field at a second temperature higher than the first temperature and at a second pressure.
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Takagi Satoshi
Takahashi Yutaka
Tomita Masahiko
Clark S. V.
Oblon & Spivak, McClelland, Maier & Neustadt P.C.
Tokyo Electron Limited
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