Patent ID: 6259129
Filing Date: 2001-07-10
Classification: H01L

Abstract:
A deep trench capacitor in a monocrystalline semiconductor substrate, said capacitor comprising (i) a buried plate in said substrate about an exterior portion of a trench in said substrate, (ii) a node dielectric about at least a lower interior portion of said trench, (iii) an electrode in said trench, and (iv) a conductive strap extending away from said trench electrode, the conductive strap being electrically connected to the trench electrode and the monocrystalline substrate, said capacitor further comprising (v) an intrinsically conductive barrier layer located at an interface with said conductive strap said interface being selected from the group consisting of (a) an interface between said conductive strap and said monocrystalline substrate or (b) an interface between said conductive strap and said trench electrode.