Patent ID: 9390915
Filing Date: 2016-07-12
CPC Classification: H01L,Y02P

Claim Text:
1. A method for processing a semiconductor substrate, the method comprising: providing a semiconductor substrate comprising a first region and a second region, the first region comprising silicon material, the second region comprising a silicon dioxide material, the first region and second region sharing a divot region; forming a fluid protective layer overlaying the semiconductor substrate and filling the divot region; causing the fluid protective layer to harden; partially removing the hardened protective layer using a first etchant without removing a protective cover overlaying the divot region; forming an dielectric layer overlaying the semiconductor substrate and the protective cover; removing the dielectric layer and a first portion of the protective cover using a second etchant; and forming a trench at the first region and removing a second portion of the protective cover using a third etchant.