Patent ID: 6440825
Filing Date: 2002-08-27
Classification: H01L

Abstract:
A method of fabricating a three-dimensional layer forming a part of a component so as to reduce the amount of outdiffusion from the layer during fabrication, said method comprising:forming a three-dimensional layer on a substrate from a lightly and uniformly doped first film and a second film on top of the first film, said first and second films having upper horizontal portions and lower horizontal portions interconnected by vertical portions, the second film having portions of high dopant concentrations and low dopant concentrations formed by doping using an angled implant as measured from said upper portions to said lower portions, respectively, and as measured through said second film; and driving the dopant from the portions of high dopant concentrations in the second film to the portions of low dopant concentrations in the second film such that the dopant concentrations of the first film adjacent to the lower portions of the second film do not increase during the driving step.