Alignment system and alignment mark

    公开(公告)号:US11651985B2

    公开(公告)日:2023-05-16

    申请号:US17135911

    申请日:2020-12-28

    CPC classification number: H01L21/682 H01L23/544 H01L2223/54426

    Abstract: An alignment system includes a light source for emitting a light. An alignment mark is disposed on a substrate for receiving the light. The alignment mark includes a first pattern and a second pattern disposed on the substrate. The first pattern includes a first region and a second region. The second pattern includes a third region and a fourth region. The first region and the third region are symmetrical with respective to a symmetrical axis. The second region and the fourth region are symmetrical with respective to the symmetrical axis. The first region includes first mark lines parallel to each other. The second region includes second mark lines parallel to each other. A first pitch is disposed between the first mark lines adjacent to each other. A second pitch is disposed between the second mark lines adjacent to each other. The first pitch is different from the second pitch.

    Method for manufacturing semiconductor device

    公开(公告)号:US10276395B2

    公开(公告)日:2019-04-30

    申请号:US15928078

    申请日:2018-03-21

    Abstract: The present invention provides a method for manufacturing a semiconductor device including following steps. A substrate, a hard mask layer disposed on the substrate and a first mask pattern disposed on the hard mask layer are provided, and the substrate has a device region and a cutting line region. The first mask pattern has first gaps in the device region and second gaps in the cutting line region. Next, a spacer layer conformally covers the first mask pattern. Then, a second mask pattern is formed on the spacer layer in the first gaps, and a top surface of the second mask pattern is lower than a top surface of the first mask pattern. Thereafter, an etching process is performed to the spacer layer to remove the spacer layer between the first mask layer and the second mask layer and in the second gaps and expose the hard mask layer.

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