Patent ID: 8367544
Filing Date: 2013-02-05
Classification: H01L

Abstract:
1. A method of forming a semiconductor device, the method comprising: patterning a photoresist layer formed over a homogeneous semiconductor device layer to be etched; subjecting the semiconductor device to an implant process that selectively implants a sacrificial etch stop layer that is self-aligned in accordance with locations of features to be etched within the homogeneous semiconductor device layer, and at a desired depth for the features to be etched; etching a feature pattern defined by the patterned photoresist layer into the homogenous semiconductor device layer, stopping on the implanted sacrificial etch stop layer; removing remaining portions of the implanted sacrificial etch stop layer prior to filling the etched feature pattern with a fill material; and performing a carbon halo implant to protect sidewalls of the etched feature pattern, prior to removal of a sacrificial organic planarizing layer formed in the etched feature pattern.