Patent ID: 6287937
Filing Date: 2001-09-11
Classification: H01L

Abstract:
A method of following a semiconductor structure comprising:providing a semiconductive substrate of a first semiconductivity type having an nitride layer thereover;forming a recess extending through the nitride layer and terminating within the semiconductive substrate;filling the recess with an dielectric material that projects out of the recess and above the nitride layer, said dielectric material being compositionally different than the material of the nitride layer;planarizing the dielectric material to form a top surface over the recess adjacent to the nitride layer;implanting through both the planarized dielectric material and the nitride layer a dopant of a second semiconductivity type to form a region of the second semiconductivity type in the semiconductive substrate; andincreasing the density of the dielectric material while expanding the size of the region of the second semiconductivity type in the semiconductive substrate.