Self-aligned contact and method for forming the same

    公开(公告)号:US11257922B2

    公开(公告)日:2022-02-22

    申请号:US16374162

    申请日:2019-04-03

    摘要: A method for forming a self-aligned contact includes providing a substrate with a plurality of gate structures formed on the substrate. The method also includes forming a spacer liner on the gate structures and the substrate. The method also includes forming a sacrificial layer between the gate structures and on the gate structures. The method also includes forming a plurality of dielectric plugs through the sacrificial layer above the gate structures. The method also includes removing the sacrificial layer to form a plurality of contact openings between the gate structures. The method also includes forming an etch resistant layer conformally covering the sidewall and the bottom of the contact openings. The method also includes forming a plurality of contact plugs in the contact openings.

    METHOD OF FABRICATING SEMICONDOCTOR DEVICE

    公开(公告)号:US20220367496A1

    公开(公告)日:2022-11-17

    申请号:US17317872

    申请日:2021-05-11

    IPC分类号: H01L27/11526

    摘要: A method for fabricating a semiconductor device includes: forming a first gate dielectric layer in a first and a second regions of a peripheral region of a substrate; forming a first conductive layer and a first hard mask layer over the substrate; forming a first mask layer on the first hard mask layer in the first region; removing the first hard mask layer outside the first region; removing the first hard mask layer; performing a wet etch process by taking the first hard mask layer as a mask, and removing the first conductive layer and the first gate dielectric layer outside the first region; removing the first hard mask layer and the first conductive layer; forming a second gate dielectric layer in the second region; and forming a first and a second gate conductive layers in the first and the second regions respectively.

    MANUFACTURING METHOD OF MEMORY DEVICE

    公开(公告)号:US20220123007A1

    公开(公告)日:2022-04-21

    申请号:US17567850

    申请日:2022-01-03

    摘要: Provided is a manufacturing method of a memory device, including: forming a stacked layer on a substrate; patterning the stacked layer to form a plurality of openings in the stacked layer; forming a spacer on a sidewall of the openings; performing a first etching process by using the spacer as a mask to form a plurality of stack structures, wherein the spacer is embedded in the stack structures, such that a width of an upper portion of the stack structures is less than a width of a lower portion thereof; forming a dielectric layer on the stack structures and the spacer; and respectively forming a plurality of contact plugs on the substrate between the stack structures.

    SEMICONDUCTOR STRUCTURE AND MANUFACTURING METHOD THEREOF AND FLASH MEMORY

    公开(公告)号:US20220037345A1

    公开(公告)日:2022-02-03

    申请号:US17376079

    申请日:2021-07-14

    摘要: Disposed are a semiconductor structure, a manufacturing method thereof and a flash memory. The semiconductor structure includes a substrate, first isolation structures, a gate structure and an oxide layer. The first isolation structures define a first active area in a peripheral region of the substrate. The oxide layer is disposed on the substrate in the first active area and covered by the first isolation structures. The oxide layer and the first isolation structures define an opening exposing the substrate. The gate structure is disposed on the substrate in the first active area and includes a gate dielectric layer disposed in the opening and a gate disposed on the gate dielectric layer. The oxide layer is located around the gate dielectric layer. The width of the bottom surface of the gate is less than that of the top surface of the first active area.