Patent ID: 6933099

Claim:
A method of forming a patterned layer on a surface over a substrate, comprising: depositing a photoresist on the surface, the photoresist patterned to define at least one recess extending vertically through the photoresist, wherein the recess includes a notch or undercut extending horizontally within the photoresist from an opening in a sidewall of the recess circumjacent a base of the recess; sputtering a material onto the photoresist and into the recess, wherein an aspect ratio of the recess and a height of the opening of the notch or undercut are such that the notch or undercut lies substantially in a shadow beneath the photoresist relative to the material sputtered into the recess; and removing the photoresist, wherein the material sputtered onto the photoresist is removed with the photoresist; wherein a height to width aspect ratio of the recess is greater than 0.5.