Patent ID: 8124506
Filing Date: 2012-02-28
Classification: H01L

Abstract:
1. A method of implanting ions in a substrate, said ions creating an implanted region having a specific junction depth and extending beneath an obstruction, comprising: performing a helium pre-amorphizing implant (PAI) into said substrate having said obstruction adjacent a gate, said obstruction defining a first side disposed on said gate, wherein said helium PAI implants under said obstruction and forms an amorphous-crystalline interface under said obstruction such that said amorphous-crystalline interface extends up to said first side; implanting dopant ions during a first phase wherein said dopant ions are implanted at 0° relative to said substrate; and implanting said dopant ions during a second phase wherein said dopant ions are implanted at an angle greater than 0° and less than or equal to 10° relative to said substrate, wherein said second phase implants said dopant ions under said obstruction.