Method of fabricating a semiconductor device

摘要

Transistors may be fabricated by isolating a first region (16) of a semiconductor layer from a second region (18) of the semiconductor layer (12). A first disposable gate structure (26) of the first transistor may be formed over the first region (16) of the semiconductor layer (12). A second disposable gate structure (28) of the second, complementary transistor may be formed over the second region (18) of the semiconductor layer (12). A capping layer (60) may be formed over the first and second regions (16, 18) including the first and second disposable gate structures (26, 28). A portion (62, 64) of the first and second disposable gate structures (26, 28) may be exposed through the capping layer (60). A second disposable gate cap (66) may be formed over the exposed portion (64) of the second disposable gate structure (28) and at least part of the first disposable gate structure (26) removed. A first gate structure (70) of the first transistor may be formed in the place of removed part of the first disposable gate structure. In one embodiment, a second gate structure (80) of the second transistor may comprise the second disposable gate structure (28). In another embodiment, a first disposable gate cap (76) may be formed over the exposed portion (78) of the first gate structure and the second disposable gate cap (66) over the second disposable gate structure (28) may be removed. The second gate structure (80) of the second transistor may then be formed in the place of the removed second disposable gate structure (28).