Method for fabricating LOCOS isolation having a planar surface w

Semiconductor device manufacturing: process – Making field effect device having pair of active regions... – Having insulated gate

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438431, 438439, 438446, 438692, H01L 21331, H01L 2176, H01L 21302

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active

06153482&

ABSTRACT:
A method for fabricating LOCOS isolation having a planar surface. The method utilizes a polysilicon spacer to prevent bird beak. The method adds the steps of forming a polishing stop layer and removing said edge-protrusion portion of the local oxide by chemical mechanical polishing.

REFERENCES:
patent: 4356211 (1982-10-01), Riseman
patent: 5246537 (1993-09-01), Cooper et al.
patent: 5252503 (1993-10-01), Pasch
patent: 5895253 (1999-04-01), Akram

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