Patent
1990-07-12
1991-09-24
Hille, Rolf
357 67, H01L 2946, H01L 2354
Patent
active
050518127
ABSTRACT:
A semiconductor device having a high reliability wiring conductor structure applicable to DRAMs and SRAMs.
The semiconductor device of the present invention is characterized by comprising a first wiring conductor film wherein a specific resistance is 5.about.15.mu..OMEGA.cm and an allowable current density is 1.times.10.sup.6 .about.1.times.10.sup.8 A/cm.sup.2 ; a second wiring conductor film having a laminated layer structure formed of a layer of high fusing point and low resistance material and a layer of an Al based alloy; and a plug composed of a high fusing point and low resistance material, electrically connecting to the first wiring conductor film and the second wiring conductor film. Thus, a semiconductor device showing almost no increase in electrical resistance in a wiring conductor film due to electromigration even after subjecting to a large current is provided.
REFERENCES:
patent: 4543592 (1985-09-01), Itsumi et al.
patent: 4556897 (1985-12-01), Yorikane et al.
patent: 4582563 (1986-04-01), Hazuki et al.
patent: 4862243 (1989-08-01), Welch et al.
patent: 4948755 (1990-08-01), Mo
Fukada Shinichi
Itagaki Tatsuo
Koubuchi Yasushi
Miyazaki Kunio
Nihei Masayasu
Clark S. V.
Hille Rolf
Hitachi , Ltd.
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