Patent ID: 8133755
Filing Date: 2012-03-13
Classification: H01L

Abstract:
1. A method comprising: determining a first desired diffusion depth to which a dopant is to be diffused through a first diffusion window, at a first location, into a semiconductor layer; determining a first attribute for a second diffusion window located at a second location, wherein the first attribute is based on the first desired diffusion depth and a pre-established relationship between the diffusion depth at the first location and the first attribute for the second diffusion window; forming a diffusion mask over the semiconductor layer, wherein the diffusion mask comprises the first diffusion window and the second diffusion window, and wherein the second diffusion window is characterized by the first attribute; and diffusing the dopant into the semiconductor layer through the first diffusion window and the second diffusion window, wherein the dopant is diffused through the first diffusion window to substantially the first desired diffusion depth.