Patent ID: 6242323
Filing Date: 2001-06-05
Classification: H01L

Abstract:
A process for producing a semiconductor device, which comprises the following steps:(1) a step of forming a pad oxide film having a thickness of at least 5 nm on a circuit-forming side of a semiconductor substrate,(2) a step of forming an anti-oxidation film on the pad oxide film,(3) a step of trenching a groove to a desired depth at a desired position on the circuit-forming side of the semiconductor substrate,(4) a step of recessing the pad oxide film to an extent of 5 nm to 40 nm from the inside wall of the groove,(5) a step of oxidizing the inside wall of the groove trenched on the semiconductor surface,(6) a step of embedding an isolation film in the oxidized groove,(7) a step of removing the embedding isolation film formed on the anti-oxidation film,(8) a step of removing the anti-oxidation film formed on the circuit-forming side of the semiconductor substrate, and(9) a step of removing the pad oxide film formed on the circuit-forming side of the semiconductor substrate.