Patent ID: 6514822
Filing Date: 2003-02-04
Classification: H01L

Abstract:
A method for providing a Flash memory device including a core and a periphery, the method comprising the steps of:(a) providing the core for the Flash memory device; (b) providing a plurality of isolation structures, a portion of the plurality of isolation structures for isolating a plurality of devices at the periphery of the Flash memory device, each of the plurality of isolation structures having a corner and an oxide filler, the step of providing the plurality of isolation structures further including the step of (b1) processing the plurality of isolation structures to reduce thinning of the oxide filler in proximity to the corner of the isolation structure, wherein the plurality of isolation structures processing step (b1) further includes the steps of: (b1i) providing a sacrificial oxide filler; (b1ii) etching the sacrificial oxide filler and a portion of the isolation structure to round the corner of each of the plurality of isolation structures; (b1iii) repeating steps (b1) and (b1ii) to further round the corner of each of the plurality of isolation structures a particular number of times; and (b1iv) providing the oxide filler.