Etch Stop Layer for Semiconductor Devices
    21.
    发明申请

    公开(公告)号:US20200279770A1

    公开(公告)日:2020-09-03

    申请号:US16876965

    申请日:2020-05-18

    Abstract: A semiconductor device includes a substrate, a first conductive feature over a portion of the substrate, and an etch stop layer over the substrate and the first conductive feature. The etch stop layer includes a silicon-containing dielectric (SCD) layer and a metal-containing dielectric (MCD) layer over the SCD layer. The semiconductor device further includes a dielectric layer over the etch stop layer, and a second conductive feature in the dielectric layer. The second conductive feature penetrates the etch stop layer and electrically connects to the first conductive feature.

    Memory device
    29.
    发明授权

    公开(公告)号:US10862026B2

    公开(公告)日:2020-12-08

    申请号:US16741557

    申请日:2020-01-13

    Abstract: A memory device includes a semiconductor substrate, a first dielectric layer, a metal contact, a metal nitride layer, an etch stop layer, a second dielectric layer, a metal via, and a memory stack. The first dielectric layer is over the semiconductor substrate. The metal contact passes through the first dielectric layer. The metal nitride layer spans the first dielectric layer and the metal contact. The etch stop layer extends along a top surface of the metal nitride layer, in which a thickness of the metal nitride layer is less than a thickness of the etch stop layer. The second dielectric layer is over the etch stop layer. The metal via passes through the second dielectric layer, the etch stop layer, and the metal nitride layer and lands on the metal contact. The memory stack is in contact with the metal via.

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