Patent ID: 6593206
Filing Date: 2003-07-15
Classification: H01L

Abstract:
An isolation region forming method comprising:forming openings through first and second masking layers over a substrate, the second masking layer being over the first masking layer; after forming the openings, removing portions of the second masking layer while leaving some of the second masking layer remaining over the substrate; after removing portions of the second masking layer, forming an insulative material within the etch openings, the insulative material within the etch openings forming at least portions of isolation regions; and forming a patterned layer of photoresist over the second masking layer before forming the openings through the first and second masking layers, the forming the openings through the first and second masking layers comprising transferring a pattern from the patterned photoresist to the first and second masking layers, at least some of the photoresist remaining over the second masking layer during the removing portions of the second masking layer.