Patent ID: 7723202
Filing Date: 2010-05-25
Classification: H01L

Abstract:
1. A method for manufacturing a semiconductor device comprising: forming a first insulating film overlying a semiconductor substrate; forming a mask pattern on said first insulating film; anisotropic-etching said first insulating film by using said mask pattern as an etching mask, to form a plurality of through-holes in said first insulating film; depositing a bottom electrode film on bottom and sidewall of said plurality of through-holes and on top of said mask pattern; depositing a second insulating film on said bottom electrode film to fill said plurality of through-holes, said second insulating film having a substantially flat surface; removing a top portion of said bottom electrode film and said second insulating film, to thereby separate said bottom electrode film into a plurality of bottom electrodes; removing said mask pattern to form a level difference between said first insulating film and a top of said plurality of bottom electrodes or said second insulating film; depositing a third insulating film covering said first insulating film, said second insulating film and said plurality of bottom electrodes; etching-back said third insulating film to leave a plurality of insulating spacers encircling the outer side of respective said bottom electrodes; removing said first and second insulating films; and depositing a capacitor insulation film and a top electrode film on said bottom electrodes and said plurality of insulating spacers to form a plurality of capacitors.