Patent ID: 6802719
Filing Date: 2004-10-12
Classification: H01L

Abstract:
A method for implanting ions into a surface of a semiconductor structure covered by a layer of insulating material, wherein a beam of ions is directed at the layer of insulating material such that a substantial proportion of ions which are implanted into the semiconductor structure surface are scattered from the beam by the layer of insulating material, wherein the surface is defined by a wall of trench formed in the semicoductor structure,wherein, before ion implantation, the trench is partially filled with conductive material electrically insulated from the semiconductor structure, wherein the trench is formed in the semiconductor structure, the trench walls are oxidized, and the trench is partially filled with a conductive material, the beam of ions being directed at a glancing angle to the oxide covering the trench walls above the conductive material, and wherein the glancing angle is between approximately 0 and 10 degrees from the perpendicular to the surface of the semiconductor device.