Source and drain process for FinFET
    214.
    发明授权
    Source and drain process for FinFET 有权
    FinFET的源极和漏极工艺

    公开(公告)号:US09570567B1

    公开(公告)日:2017-02-14

    申请号:US14984514

    申请日:2015-12-30

    Abstract: A FinFET includes a substrate, a fin structure, a dielectric layer, a metal gate, two spacers, a source and a drain. The fin structure is disposed on the substrate. The dielectric layer is disposed on the fin structure and covers two opposite side surfaces of the fin structure. The dielectric layer includes two first portions protruding from the side surfaces of the fin structure, such that two opposite first recesses are formed in the dielectric layer. The metal gate is disposed on a second portion of the dielectric layer which is sandwiched between the first portions. The spacers are disposed on the first portions of the dielectric layer and protrude from the first portions of the dielectric layer respectively, such that two second recesses are formed in the spacers. The source and drain are respectively disposed in the first recesses and the second recesses on the substrate.

    Abstract translation: FinFET包括衬底,鳍结构,电介质层,金属栅极,两个间隔物,源极和漏极。 翅片结构设置在基板上。 电介质层设置在翅片结构上并且覆盖翅片结构的两个相对的侧表面。 电介质层包括从翅片结构的侧表面突出的两个第一部分,使得在电介质层中形成两个相对的第一凹部。 金属栅极设置在夹在第一部分之间的电介质层的第二部分上。 间隔物设置在电介质层的第一部分上,并且从电介质层的第一部分突出,使得在间隔物中形成两个第二凹槽。 源极和漏极分别设置在基板的第一凹部和第二凹部中。

    DUMMY GATE CUTTING PROCESS AND RESULTING GATE STRUCTURES

    公开(公告)号:US20240421211A1

    公开(公告)日:2024-12-19

    申请号:US18783711

    申请日:2024-07-25

    Abstract: A method includes forming a dummy gate stack, etching the dummy gate stack to form an opening, depositing a first dielectric layer extending into the opening, and depositing a second dielectric layer on the first dielectric layer and extending into the opening. A planarization process is then performed to form a gate isolation region including the first dielectric layer and the second dielectric layer. The dummy gate stack is then removed to form trenches on opposing sides of the gate isolation region. The method further includes performing a first etching process to remove sidewall portions of the first dielectric layer, performing a second etching process to thin the second dielectric layer, and forming replacement gates in the trenches.

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