Patent ID: 6919277

Claim:
A method for creating a plurality of devices on a semiconductor wafer, each of the plurality of devices having a plurality of device characteristics, the method comprising the steps of: providing a layer of semiconductor film that at least partially covers a substrate of the semiconductor wafer, wherein the semiconductor film: comprises a first composition at a first location on the semiconductor wafer, the first composition comprising at least two materials in a first predetermined proportion; and comprises a second composition at a second location on the semiconductor wafer, the second composition comprising at least two materials in a second predetermined proportion, wherein the semiconductor film at the first location will become part of at least one of the plurality of devices, wherein the semiconductor film at the second location will become part of at least one other device of the plurality of devices, and wherein the first and second compositions are different and are expected to create differences in at least one of the plurality of device characteristics between devices created at the first location and devices created at the second location; and performing a plurality of semiconductor processing steps on the semiconductor film to create the plurality of devices.