Microelectromechanical system with piezoelectric film and manufacturing method thereof

    公开(公告)号:US12133467B2

    公开(公告)日:2024-10-29

    申请号:US17876393

    申请日:2022-07-28

    Inventor: Ting-Jung Chen

    CPC classification number: H10N30/063 H10N30/09 H10N30/50 H10N30/872

    Abstract: A method for forming a MEMS device is provided. The method includes forming a stack of layers on a base piezoelectric layer. The stack of layers includes a base metal film over the base piezoelectric layer; a first piezoelectric film over the base metal film; and a first metal film having an opening therein over the first piezoelectric film. The method also includes forming a trench in the stack of layers, wherein the trench passes through the opening in the first metal film but does not expose the base metal film; after forming the trench, forming a spacer structure under the first metal film but spaced apart from the base metal film; after forming the spacer structure, deepening the trench to expose the base metal film; and forming a contact in the trench.

    Semiconductor device having a multilayer source/drain region and methods of manufacture

    公开(公告)号:US12132118B2

    公开(公告)日:2024-10-29

    申请号:US17231183

    申请日:2021-04-15

    CPC classification number: H01L29/78696 H01L29/0665 H01L29/66742

    Abstract: Semiconductor devices and methods of fabricating the semiconductor devices are described herein. The method includes steps for patterning fins in a multilayer stack and forming an opening in a fin as an initial step in forming a source/drain region. The opening is formed into a parasitic channel region of the fin. Once the opening has been formed, a first semiconductor material is epitaxially grown at the bottom of the opening to a level over the top of the parasitic channel region. A second semiconductor material is epitaxially grown from the top of the first semiconductor material to fill and/or overfill the opening. The second semiconductor material is differently doped from the first semiconductor material. A stack of nanostructures is formed by removing sacrificial layers of the multilayer stack, the second semiconductor material being electrically coupled to the nanostructures.

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