Patent ID: 6248625
Filing Date: 2001-06-19
Classification: H01L

Abstract:
A method of manufacturing a cylindrical-capacitor lower electrode for use in semiconductor device; which comprises the steps of:forming an interlayer insulating film on a semiconductor substrate where semiconductor elements are formed;opening a recess section that is to function as a mould of a cylindrical-capacitor lower electrode in a prescribed region of said interlayer insulating film;forming a conductive film over said interlayer insulating film which includes an internal wall of said recess section, without changing the recess form;coating thick said conductive film with a positive photoresist so as to fill up said recess section;exposing said photoresist lying on said conductive film to light, while leaving said photoresist inside of said recess section;developing in which said photoresist lying on said conductive film is selectively removed, while leaving said photoresist inside of said recess section;performing etch-back in which said conductive film lying on said interlayer insulating film is selectively removed by means of etching, while leaving said conductive film inside of said recess section; andpeeling in which said photoresist inside of said recess section is removed; wherein:in said step of exposure, exposure is made in such a way that the oblique components of the incident light, with respect to the direction normal to the semiconductor substrate is substantially dominant, at least, in the formation region of said lower electrode.