Patent ID: 8178403

Claim:
A method of providing layers of different thickness on vertical and horizontal surfaces of a vertical semiconductor device comprising a substrate and a structure protruding from the substrate, the substrate providing a horizontal surface and the protruding structure providing a vertical surface, wherein the method comprises the steps of: depositing a layer material on both the vertical surface and the horizontal surface, wherein the deposited layer is a precision layer, and wherein the depositing is performed isotropically; removing the layer material from at least one of the vertical surface and the horizontal surface, wherein the removing of the layer material is anisotropic resulting in a deposited layer that is thinner on one of the vertical and horizontal surfaces than the other; and prior to the depositing the layer material: depositing a sacrificial layer; depositing a mold layer over the sacrificial layer; selectively removing at least one part of the mold layer; and selectively removing at least one part of the sacrificial layer.