METHOD FOR WAFER PLANARIZATION AND AN IMAGE SENSOR MADE BY THE SAME

    公开(公告)号:US20200168471A1

    公开(公告)日:2020-05-28

    申请号:US16439211

    申请日:2019-06-12

    Abstract: A method for wafer planarization includes forming a second insulating layer and a polishing layer on a substrate having a chip region and a scribe lane region; forming a first through-hole in the polishing layer in the chip region and the scribe lane region and a second through-hole in the second insulating layer in the chip region, wherein the second through-hole and the first through-hole meet in the chip region; forming a pad metal layer inside the first through-hole and the second through-hole and on an upper surface of the polishing layer; and polishing the polishing layer and the pad metal layer by a chemical mechanical polishing (CMP) process to expose an upper surface of the second insulating layer in the chip region and the scribe lane region

    IMAGE SENSOR
    5.
    发明申请

    公开(公告)号:US20220130884A1

    公开(公告)日:2022-04-28

    申请号:US17393855

    申请日:2021-08-04

    Abstract: An image sensor including a variable resistance element is provided. The image sensor comprises first and second chips having first and second connecting structures; and a contact plug connecting the first and second chips. The first chip includes a photoelectric conversion element. The second chip includes a first variable resistance element. The contact plug extends from the first surface of the first semiconductor substrate to connect the first and second connecting structures.

Patent Agency Ranking