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
2006-10-03
2006-10-03
Parker, Kenneth (Department: 2815)
Active solid-state devices (e.g., transistors, solid-state diode
Combined with electrical contact or lead
Of specified material other than unalloyed aluminum
C257S760000, C257SE21232, C257SE21270, C438S671000
Reexamination Certificate
active
07115993
ABSTRACT:
A semiconductor device includes a semiconductor substrate, a film stack formed on the semiconductor substrate and having a film to be processed. A dual hard mask included in the film stack has an amorphous carbon layer and an underlying hard mask layer interposed between the amorphous carbon layer and the film to be processed, the hard mask layer does not include an amorphous carbon layer. A damascene structure for a metal interconnect is formed in the film stack. The amorphous carbon film can, for example, be incorporated within a single damascene structure, or a dual damascene structure. The amorphous carbon film can serve as part of a lithographic mask for forming the interconnect structure, or it may serve as a top layer of a dual hard mask, a chemical mechanical polishing (CMP) stop layer, or a sacrificial layer during CMP.
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Lee Eric M.
Toma Dorel Ioan
Wang David C.
Wetzel Jeffrey T.
Oblon & Spivak, McClelland, Maier & Neustadt P.C.
Parker Kenneth
Tokyo Electron Limited
Warren Matthew E.
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