Method of stabilizing semiconductor device by converting doped poly-Si to polyoxides
First Claim
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1. A method of stabilizing a semiconductor device comprising the steps:
- (a) depositing polysilicon on a semiconductor device,(b) doping the polysilicon with a stabilizing material, and(c) converting the polysilicon to polyoxide.
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Abstract
A method for making a semiconductor device is described in which polycrystalline silicon is vacuum deposited and then converted to silicon dioxide thereby providing a number of advantages over direct deposition of silicon dioxide. The method has particular applicability to isoplanar MOSFET integrated circuit manufacturing.
47 Citations
7 Claims
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1. A method of stabilizing a semiconductor device comprising the steps:
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(a) depositing polysilicon on a semiconductor device, (b) doping the polysilicon with a stabilizing material, and (c) converting the polysilicon to polyoxide. - View Dependent Claims (2, 3)
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4. A method of making an isoplanar MOS device comprising the steps:
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(a) growing a thick isoplanar field oxide around an active area in a semiconductor substrate, (b) forming an MOS device in the active area, (c) growing a thin thermal oxide in the active area, (d) depositing a polysilicon layer over both the thick field oxide and the thin thermal oxide, (e) oxidizing the entire polysilicon layer to produce a polyoxide layer, and (f) forming contacts through windows in the polyoxide layer. - View Dependent Claims (5, 6, 7)
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Specification