Metal gate transistor and method for fabricating the same
A method for fabricating metal gate transistor is disclosed. First, a substrate having a first transistor region and a second transistor region is provided. Next, a stacked film is formed on the substrate, in which the stacked film includes at least one high-k dielectric layer and a first metal layer. The stacked film is patterned to form a plurality of gates in the first transistor region and the second transistor region, a dielectric layer is formed on the gates, and a portion of the dielectric layer is planarized until reaching the top of each gates. The first metal layer is removed from the gate of the second transistor region, and a second metal layer is formed over the surface of the dielectric layer and each gate for forming a plurality of metal gates in the first transistor region and the second transistor region.
United Microelectronics Corp.
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Li-Wei Che-Hua Yi-Wen Cheng-Hsien Tian-Fu Chien-Ting Chien-Ming Guang-Hwa Jung-Tsung Chih-Hao
Cheng Hsu Chen Chou Chiang Lin Lai Ma Tseng Yu