Active solid-state devices (e.g. – transistors – solid-state diode – Combined with electrical contact or lead – Of specified material other than unalloyed aluminum
Reexamination Certificate
2007-04-03
2007-04-03
Potter, Roy Karl (Department: 2822)
Active solid-state devices (e.g., transistors, solid-state diode
Combined with electrical contact or lead
Of specified material other than unalloyed aluminum
C257S750000
Reexamination Certificate
active
10970027
ABSTRACT:
In a semiconductor device having the upmost wiring layer comprised of aluminum and the wiring layer immediately below it comprised of copper, the upmost wiring layer is made thicker than the wiring layer immediately below it so that the upmost wiring layer is lower in sheet resistance than the wiring layer immediately below it. Multiple ring power lines VR and pads PD are formed of the upmost wiring layer, and the ring power lines VR and the pads PD are connected respectively through power lines VLB1of the upmost wiring layer. Consequently, the voltage drop on the power feed path from the pads PD to the ring power lines VR can be reduced and the power conduction from the pads PD to the ring power lines VR can be stabilized.
REFERENCES:
patent: 6150726 (2000-11-01), Feilchenfeld et al.
patent: 6633082 (2003-10-01), Oda et al.
patent: 6674167 (2004-01-01), Ahn et al.
patent: 6809419 (2004-10-01), Minami et al.
patent: 2000-311964 (2000-11-01), None
Kuwata Makoto
Minami Toshiaki
Sakuta Toshiyuki
Hitachi , Ltd.
Miles & Stockbridge P.C.
Potter Roy Karl
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