Semiconductor test structure and method for forming the same

    公开(公告)号:US10699973B2

    公开(公告)日:2020-06-30

    申请号:US15804165

    申请日:2017-11-06

    Abstract: A test structure for semiconductor chips of a wafer, and the method of forming the same is included. The test structure may include a first portion disposed within a corner area of a first chip on the wafer, and at least another portion disposed within another corner of another chip on the wafer, wherein before dicing of the chips, the portions form the test structure. The test structure may include an electronic test structure or an optical test structure. The electronic test structure may include probe pads, each probe pad positioned across two or more corner areas of two or more chips. The corner areas including the test structures disposed therein may be removed from the chips during a dicing of the chips.

    STRUCTURES WITH AN AIRGAP AND METHODS OF FORMING SUCH STRUCTURES

    公开(公告)号:US20190273132A1

    公开(公告)日:2019-09-05

    申请号:US15911831

    申请日:2018-03-05

    Abstract: Structures that include an airgap and methods for forming a structure that includes an airgap. A layer stack is epitaxially grown on a substrate and includes a first semiconductor layer and a second semiconductor layer on a substrate. A plurality of openings are formed that extend through a device region of the first semiconductor layer to the second semiconductor layer. The second semiconductor layer is etched through the openings and selective to the substrate and the first semiconductor layer so as to form an airgap that is arranged in a vertical direction between the substrate and the device region. A device structure is formed in the device region of the first semiconductor layer.

    Structures with an airgap and methods of forming such structures

    公开(公告)号:US10388728B1

    公开(公告)日:2019-08-20

    申请号:US15911831

    申请日:2018-03-05

    Abstract: Structures that include an airgap and methods for forming a structure that includes an airgap. A layer stack is epitaxially grown on a substrate and includes a first semiconductor layer and a second semiconductor layer on a substrate. A plurality of openings are formed that extend through a device region of the first semiconductor layer to the second semiconductor layer. The second semiconductor layer is etched through the openings and selective to the substrate and the first semiconductor layer so as to form an airgap that is arranged in a vertical direction between the substrate and the device region. A device structure is formed in the device region of the first semiconductor layer.

    SHALLOW TRENCH ISOLATION FORMATION WITHOUT PLANARIZATION

    公开(公告)号:US20180350659A1

    公开(公告)日:2018-12-06

    申请号:US15609742

    申请日:2017-05-31

    CPC classification number: H01L21/76229 H01L21/0262 H01L21/76235 H01L21/7624

    Abstract: Structures for shallow trench isolation regions and methods for forming shallow trench isolation regions. A trench is etched partially through a device layer of a silicon-on-insulator substrate. A section of the device layer at a bottom of the trench is thermally oxidized to form a shallow trench isolation region in the trench. During the thermal oxidation, another region of the device layer may be concurrently oxidized over a partial thickness and, after removal of the oxide from this device layer region, used as a thinned silicon body. Prior to the thermal oxidation process, this device layer region may be implanted with an oxidation-retarding species that decreases its oxidation rate in comparison with the oxidation rate of the section of the device layer used to form the shallow trench isolation region.

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