Patent ID: 7279396
Filing Date: 2007-10-09
Classification: H01L

Abstract:
1. A method of forming a trench isolation region comprising: forming a masking material over a semiconductor substrate; forming an opening through the masking material and into the semiconductor substrate effective to form an isolation trench within semiconductive material of the semiconductor substrate; depositing a silicon nitride-comprising layer within the isolation trench and over the masking material effective to line the trench; depositing trench isolation material over the silicon nitride-comprising layer within the isolation trench and over the masking material outside of the trench; polishing the trench isolation material and the silicon nitride-comprising layer at least to the masking material; and removing the masking material and the trench isolation material relative to the silicon nitride-comprising layer from outwardly of semiconductive material of the semiconductor substrate effective to leave a portion of the silicon nitride-comprising layer projecting outwardly from semiconductive material of the semiconductor substrate, the silicon nitride-comprising portion after the removing having an elevationally outermost surface which is received elevationally outward of an elevationally outermost surface of said trench isolation material after the removing.