Patent ID: 7092233
Filing Date: 2006-08-15
Classification: H01L

Abstract:
1. A method of confining a depletion region in a capacitor, comprising: forming a first electrode comprising a plurality of dopant atoms, said first electrode having a first surface comprising a plurality of bonding sites thereon; forming an interface layer on the first surface of said electrode, said interface layer comprising a plurality of dopant atoms chemically bonded therein; and chemically bonding the interface layer to at least some of the bonding sites on the first surface of said electrode in a manner such that the interface layer extends from said first surface, wherein the concentration of the dopant atoms in the interface layer is greater than the concentration of the dopant atoms in the first electrode so as to substantially confine a depletion region in the first electrode to the interface layer, wherein forming the interface layer comprises forming a layer having a chemical composition that is different from that of the first electrode, wherein forming the interface layer comprises forming a layer comprising hexamethldisilazane (HMDS).