- 专利标题: Non-volatile memory structure employing high-k gate dielectric and metal gate
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申请号: US13326767申请日: 2011-12-15
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公开(公告)号: US09318336B2公开(公告)日: 2016-04-19
- 发明人: Nicolas Breil , Michael P. Chudzik , Rishikesh Krishnan , Siddarth A. Krishnan , Unoh Kwon
- 申请人: Nicolas Breil , Michael P. Chudzik , Rishikesh Krishnan , Siddarth A. Krishnan , Unoh Kwon
- 申请人地址: US NY Hopewell Junction
- 专利权人: GLOBALFOUNDRIES U.S. 2 LLC
- 当前专利权人: GLOBALFOUNDRIES U.S. 2 LLC
- 当前专利权人地址: US NY Hopewell Junction
- 代理机构: Scully, Scott, Murphy & Presser, P.C.
- 优先权: FR11306392.9 20111027
- 主分类号: H01L27/115
- IPC分类号: H01L27/115 ; H01L21/28 ; H01L29/51 ; H01L29/788 ; H01L21/8238 ; H01L29/423 ; H01L29/66 ; H01L21/02 ; H01L29/49
摘要:
A high dielectric constant (high-k) gate dielectric for a field effect transistor (FET) and a high-k tunnel dielectric for a non-volatile random access memory (NVRAM) device are simultaneously formed on a semiconductor substrate. A stack of at least one conductive material layer, a control gate dielectric layer, and a disposable material layer is subsequently deposited and lithographically patterned. A planarization dielectric layer is deposited and patterned, and disposable material portions are removed. A remaining portion of the control gate dielectric layer is preserved in the NVRAM device region, but is removed in the FET region. A conductive material is deposited in gate cavities to provide a control gate for the NVRAM device and a gate portion for the FET. Alternately, the control gate dielectric layer may replaced with a high-k control gate dielectric in the NVRAM device region.
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