发明授权
US07923785B2 Field effect transistor having increased carrier mobility 有权
场效应晶体管的载流子迁移率增加

Field effect transistor having increased carrier mobility
摘要:
According to one exemplary embodiment, a FET which is situated over a substrate, comprises a channel situated in the substrate. The FET further comprises a first gate dielectric situated over the channel, where the first gate dielectric has a first coefficient of thermal expansion. The FET further comprises a first gate electrode situated over the first gate dielectric, where the first gate electrode has a second coefficient of thermal expansion, and where the second coefficient of thermal expansion is different than the first coefficient of thermal expansion so as to cause an increase in carrier mobility in the FET. The second coefficient of thermal expansion may be greater that the first coefficient of thermal expansion, for example. The increase in carrier mobility may be caused by, for example, a tensile strain created in the channel.
公开/授权文献
信息查询
0/0