Semiconductor device manufacturing: process – Coating with electrically or thermally conductive material – To form ohmic contact to semiconductive material
Reexamination Certificate
2005-10-14
2009-11-03
Richards, N Drew (Department: 2895)
Semiconductor device manufacturing: process
Coating with electrically or thermally conductive material
To form ohmic contact to semiconductive material
C257SE21584
Reexamination Certificate
active
07611984
ABSTRACT:
(a) A copper alloy film containing at least two types of metal elements in addition to copper is formed on the surface of an insulator containing oxygen and formed on a semiconductor substrate. (b) A metal film made of pure copper or copper alloy is formed on the copper alloy film. (c) After the step (a) or (b), heat treatment is performed under the condition that a metal oxide film is formed on a surface of the insulator through reaction between the oxygen in the insulator and the metal elements in the copper alloy film.
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Kitada Hideki
Koura Yumiko
Ozawa Kiyoshi
Fujitsu Microelectronics Limited
Richards N Drew
Westerman, Hattori, Daniels & Adrian , LLP.
Withers Grant S
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