Patent ID: 6258693
Filing Date: 2001-07-10
Classification: H01L

Abstract:
A method for making a dielectric isolation region, comprising:forming a masking layer over a semiconductor substrate, the masking layer having a thickness sufficient to block ions accelerated by an ion implantation device;patterning the masking layer to define a dielectric isolation area;forming a dislocation region by implanting ions into the substrate at the dielectric isolation area; andheating in an oxidizing atmosphere the implanted substrate, wherein the heating is sufficient to cause at least a portion of the implanted ions to form a dielectric in a lower portion of the dislocation region, and the oxidizing atmosphere is sufficient to ensure the conversion into a dielectric of an upper portion of the dislocation region extending from the lower portion to a top surface of the dislocation region, the top surface of the dislocation region being essentially coplanar with a top surface of the semiconductor substrate.