Patent ID: 6649469
Filing Date: 2003-11-18
Classification: H01L

Abstract:
A method of forming a capacitor, comprising:depositing a container forming layer over a substrate; depositing a carbon containing masking layer over the container forming layer; patterning the masking layer to comprise a plurality of container openings therein having minimum feature dimensions of less than or equal to 0.20 micron, the container openings respectively having at least three peripheral corner areas which are each rounded; plasma etching the container forming layer through the masking layer openings using conditions effective to both a) etch the masking layer to modify the shape of the masking layer openings by at least reducing the degree of roundness of the at least three corners in the masking layer, and b) form container openings in the container forming layer of the modified shapes; and forming capacitors comprising container shapes using the container openings in the container forming layer.