Semiconductor device with improved planarization properties

Active solid-state devices (e.g. – transistors – solid-state diode – Combined with electrical contact or lead – Of specified material other than unalloyed aluminum

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257760, 257758, H01L 21321, H01L 23485

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active

054790549

ABSTRACT:
A polycrystalline silicon film is formed on the surface of a semiconductor substrate. An oxide film having a first impurity concentration is formed to cover the polycrystalline silicon film. A polycrystalline silicon film and a refractory metal silicide are formed on the surface of the oxide film having the first impurity concentration. An oxide film having a second impurity concentration higher than the first impurity concentration is formed to cover the polycrystalline silicon film and the refractory metal silicide. The third conductive layer is formed on the surface of the oxide film having the second impurity concentration.

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"Rapid Flow of Doped Glasses for VLSIC Fabication", by Jacques S. Mercier, Solid-State Technology/Jul. 1987, pp. 85-91.
"0.3 .mu.m Process Technique", by Takeo Yoshimi, Trikeps Co., Ltd., 1990.
"Application of Chemical Mechanical Polishing to the Fabrication of VLSI Circuit Interconnections", by William J. Patrick et al., J. Electrochem. Soc., vol. 138, No. 6, Jun. 1991, pp. 1778-1784.

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