Patent ID: 7902036
Filing Date: 2011-03-08
Classification: H01L

Abstract:
1. A method of fabricating a semiconductor device comprising: forming a plurality of trench-like recesses in a semiconductor substrate, the recesses including one or more recesses each of which has an opening width of not more than a predetermined value; forming a first insulating film above the semiconductor substrate after the recesses have been formed therein, whereby one or a plurality of voids are formed in said one or more recesses whose opening widths are not more than the predetermined value, the voids being formed along a direction in which the recesses are formed; removing part of the first insulating film so that a beam is left which has a predetermined width and spans the openings so that the beam passes over upper surfaces of said one or more recesses and so that at least the voids are exposed in a portion of the semiconductor substrate except the beam; and filling the voids in the recesses with a material with a predetermined fluidity, thereby forming second insulating films in the corresponding recesses.