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
2006-11-28
2006-11-28
Flynn, Nathan J. (Department: 2826)
Active solid-state devices (e.g., transistors, solid-state diode
Combined with electrical contact or lead
Of specified material other than unalloyed aluminum
C257S774000, C438S622000, C438S629000
Reexamination Certificate
active
07141881
ABSTRACT:
A semiconductor device includes an interconnection structure in which via-plug density is higher in an upper layer part than a lower layer part, wherein the peeling of the lower via-plugs at the time of formation of the upper-via-plugs is avoided by restricting the density of the upper s, defined for a unit area having a size of 50–100 μm for each edge, to be 60% or less.
REFERENCES:
patent: 2003/0155642 (2003-08-01), Davis et al.
patent: 11-233517 (1999-08-01), None
patent: 2002-299342 (2002-10-01), None
patent: 2003-142485 (2003-05-01), None
Fuhan Liu; Sundaram, V.; Mekala, S.; White, G.; Sutter, D.A.; Tummala, R.R.; Fabrication of Ultra-Fine Line Circuits on PWB Substrates; IEEE Electronic Components and Technology Conference, 2002. Proceedings. 52nd; May 28-31, 2002 pp. 1425-1431.
Itou Tetsuya
Takayama Toshio
Flynn Nathan J.
Fujitsu Limited
Westerman, Hattori, Daniels & Adrian , LLP.
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