Patent ID: 7713813
Filing Date: 2010-05-11
Classification: H01L

Abstract:
1. A method of forming a plurality of capacitors, comprising: providing an assembly comprising a semiconductor substrate supporting a plurality of electrical nodes, a first material over the semiconductor substrate, and an electrically insulative retaining material over the first material; forming openings extending through the retaining material and the first material to the electrical nodes; forming capacitor electrode material within the openings to narrow the openings; forming silicon within the narrowed openings; while the silicon is within the narrowed openings, etching at least some of the first material with an isotropic etch selective for the first material relative to the retaining material; removing the silicon with a silicon etch, the silicon etch forming whiskers of the capacitor electrode material; exposing the capacitor electrode material to an etch to remove some of the capacitor electrode material and to remove the whiskers; and after the removal of the whiskers, incorporating conductive capacitor electrode material remaining within the openings into a plurality of capacitors.