Patent ID: 8765583

Claim:
A method of implanting a pattern into a substrate, comprising: placing a mask, having at least one aperture, in a path of an ion beam between said substrate and an ion source, wherein said mask has a fixed spatial relationship to said substrate; rotating said substrate at a first tilt angle relative to said ion beam; exposing said substrate to said ion beam at a first tilt angle while maintaining said fixed spatial relationship between said substrate and said mask, thereby implanting ions in a first region of said substrate aligned with said aperture when tilted at said first tilt angle; rotating said substrate and said mask at a second tilt angle relative to said ion beam; and exposing said substrate to said ion beam at a second tilt angle while maintaining said fixed spatial relationship between said substrate and said mask, thereby implanting ions in a second region of said substrate, aligned with said aperture when tilted at said second tilt angle; whereby a portion of said first region and a portion of said second region overlap, creating a heavily implanted third region, the third region having a higher implant dose than the first region and a second region outside of the third region.