Patent ID: 7781314
Filing Date: 2010-08-24
Classification: C30B,H01L,Y10S

Abstract:
1. A method of manufacturing nitride-based semiconductor devices formed onto a semiconductor substrate being a compound containing nitrogen, and a Group IIIA element for forming compounds with nitrogen, the nitride semiconductor device manufacturing method comprising: a step of heating the semiconductor substrate to a film-deposition temperature; a step of supplying to the substrate a film-deposition gas containing a source gas for the Group IIIA element and a nitrogen source gas; a step of epitaxially growing onto the semiconductor substrate a thin film of a compound containing nitrogen and the Group IIIA element; and a step, in advance of the epitaxial growth step, of heating the semiconductor substrate to a pretreating temperature that is constant and that is less than the film-deposition temperature, and supplying to the substrate a pretreatment gas in which the proportion of Group-IIIA-element source gas has been reduced below what the proportion is in the film-deposition gas for the epitaxial growth step, to clean the front side of the semiconductor substrate.