Patent ID: 7868369

Claim:
A processing stage container capacitor, comprising: a bottom plate of the processing stage container capacitor, the bottom plate formed in a container layer, wherein the container layer is formed on a container hole in an insulating layer on a substrate, the bottom plate having a closed bottom and sidewalls extending upward from the closed bottom; and an underexposed resist layer formed in the container hole covering a portion of the container layer, wherein the under-exposed resist layer includes a surface at the open top of the container hole that is non-planar, and wherein edges of the non-planar surface contact the sidewalls at an approximately equal depth, wherein the bottom plate is formed by a method comprising: forming the insulating layer having a surface and overlying the substrate, wherein the insulating layer comprises an insulating material selected from the group consisting of borophosphosilicate glass, oxides and nitrides; forming the container hole in the insulating layer and having a closed bottom, an open top and sidewalls extending between the closed bottom and open top; forming the container layer at least on the surface of the insulating layer and the sidewalls and closed bottom of the container hole, wherein the container layer comprises hemispherical grain polysilicon; forming a resist layer overlying the container layer and filling the container hole, wherein the resist layer is of a positive resist type; selectively exposing the resist layer to energy capable of exposing the resist layer, thereby forming an exposed resist portion and the underexposed resist portion, wherein the underexposed resist portion fills at least a portion of the container hole; removing the exposed resist portion, thereby forming an uncovered portion of the container layer; and removing the uncovered portion of the container layer using a non-mechanical technique selected from the group consisting of wet etch, etch and chemical dissolution, thereby forming the bottom plate.