Patent ID: 6849521
Filing Date: 2005-02-01
Classification: H01L

Abstract:
1. A method for manufacturing a semiconductor device, comprising the steps of: forming, in a semiconductor layer formed on a first insulating film, an element isolation groove extending to the first insulating film; depositing a second insulating film so as to partially fill the element isolation groove by using a vapor deposition method; forming an embedded layer on the second insulating film so as to completely fill the element isolation groove; and forming a third insulating film on the embedded layer, wherein the step of forming the element isolation groove includes another step of forming at least a pair of element isolation grooves with respect to one element formation region of the semiconductor layer; in the step of forming the third insulating film, the third insulating film is formed such that the pair of element isolation grooves are continuously covered, second insulating film and the third insulating film are composed of SiO2 the pair of element isolation grooves sandwich a region other than the element formation region, and the third insulation region continuously covers the pair of element isolation grooves and the region other than the element formation region in the completed device.