Patent ID: 8658539

Claim:
A method for forming a FinFET device, the method comprising: forming a plurality of semiconductor fins over a semiconductor substrate, the forming a plurality of semiconductor fins comprising: patterning a first upper portion of a first semiconductor fin; at a same time as the patterning the first upper portion, patterning a second upper portion of a second semiconductor fin; forming a first lower portion of the first semiconductor fin, the first lower portion under the first upper portion, and the first lower portion having a first top section and a first bottom section, the first top section having a first width and the first bottom section having a second width, the second width being larger than the first width; and at a same time as the forming the first lower portion, forming a second lower portion of the second semiconductor fin, the second lower portion under the second upper portion, and the second lower portion having a second top section and a second bottom section, the second top section having a third width and the second bottom section having a fourth width, the fourth width being larger than the third width, and the fourth width being less the second width.