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US08502286B2 Etch stop layers and methods of forming the same 有权
蚀刻停止层及其形成方法

Etch stop layers and methods of forming the same
Abstract:
A semiconductor device includes a MOSFET, and a plurality of stress layers disposed on the MOSFET, wherein the stress layers include a first stress layer disposed on the MOSFET and a second stress layer disposed on the first stress layer, the first stress layer has a first stress and the second stress layer has a second stress, and the first stress is different from the second stress.
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