Patent ID: 9679776
Date: 2017-06-13
CPC Classifications: H01L

Claim:
1. A method of processing a workpiece, comprising: depositing a carbon-based protective layer on the workpiece, wherein the carbon-based protective layer is conformally deposited on the workpiece; forming a blocking layer on a portion of the carbon-based protective layer, less than an entirety of the carbon-based protective layer, wherein the conformally deposited carbon-based protective layer is not affected by and remains intact after the forming of the blocking layer, wherein the forming comprises: depositing the blocking layer on the carbon-based protective layer; applying photoresist to a portion of the blocking layer; removing a portion of the blocking layer not covered by the photoresist without affecting the carbon-based protective layer; and removing the photoresist from the blocking layer; directing ions toward the workpiece after forming the blocking layer while the conformally deposited carbon-based protective layer remains intact on the workpiece and after the photoresist has been removed, wherein ions pass through the carbon-based protective layer and implant the workpiece, but do not pass through the blocking layer; removing the blocking layer after the directing; and removing the carbon-based protective layer after the directing.