Semiconductor Wafer Backside Metallization With Improved Backside Metal Adhesion
    2.
    发明申请
    Semiconductor Wafer Backside Metallization With Improved Backside Metal Adhesion 审中-公开
    半导体晶圆背面金属化与背面金属附着力的改善

    公开(公告)号:US20160379926A1

    公开(公告)日:2016-12-29

    申请号:US15190038

    申请日:2016-06-22

    Abstract: A method of fabricating a semiconductor structure includes: grinding a backside surface of a semiconductor substrate such that the backside surface has a relatively high average roughness (Ra) (when compared with a backside surface subjected to chemical mechanical polishing (CMP)), and then, forming a backside metal structure on the backside surface while the backside surface has the relatively high average roughness. The backside surface can have an average roughness in the range of about 5 to 100 nanometers (or alternately, in the range of about 20 to 40 nanometers) when the backside metal structure is formed. The backside metal structure may be electrically coupled to through silicon vias (TSVs), which supply ground to semiconductor devices fabricated on a front side of the semiconductor substrate.

    Abstract translation: 制造半导体结构的方法包括:研磨半导体衬底的背面,使得背面具有相对高的平均粗糙度(Ra)(与经过化学机械抛光(CMP)的背面相比),然后 在背面上形成背面金属结构,而背面具有较高的平均粗糙度。 当形成背面金属结构时,背面可以具有在约5至100纳米(或者替代地,在约20至40纳米的范围内)范围内的平均粗糙度。 背面金属结构可以电耦合到通过硅通孔(TSV),硅通孔(TSV)将制造在半导体衬底的前侧上的半导体器件提供接地。

    Bulk CMOS RF Switch With Reduced Parasitic Capacitance

    公开(公告)号:US20180323114A1

    公开(公告)日:2018-11-08

    申请号:US15587969

    申请日:2017-05-05

    Abstract: Bulk CMOS RF switches having reduced parasitic capacitance are achieved by reducing the size and/or doping concentration of the switch's N-doped tap (N-Tap) element, which is used to conduct a bias voltage to a Deep N-Well disposed under each switch's P-Type body implant (P-Well). Both the P-Well and the N-Tap extend between an upper epitaxial silicon surface and an upper boundary of the Deep N-well. A low-doping-concentration approach utilizes intrinsic (lightly doped) N-type epitaxial material to provide a body region of the N-Tap element, whereby an N+ surface contact diffusion is separated from an underlying section of the Deep N-well by a region of intrinsic epitaxial silicon. An alternative reduced-size approach utilizes an open-ring deep trench isolation structure that surrounds the active switch region (e.g., the Deep N-well and P-Well), and includes a relatively small-sized N-Tap region formed in an open corner region of the isolation structure.

    Bulk CMOS RF Switch With Reduced Parasitic Capacitance

    公开(公告)号:US20180323115A1

    公开(公告)日:2018-11-08

    申请号:US15941234

    申请日:2018-03-30

    Abstract: Bulk CMOS RF switches having reduced parasitic capacitance are achieved by reducing the size and/or doping concentration of the switch's N-doped tap (N-Tap) element, which is used to conduct a bias voltage to a Deep N-Well disposed under each switch's P-Type body implant (P-Well). Both the P-Well and the N-Tap extend between an upper epitaxial silicon surface and an upper boundary of the Deep N-well. A low-doping-concentration approach utilizes intrinsic (lightly doped) N-type epitaxial material to provide a body region of the N-Tap element, whereby an N+ surface contact diffusion is separated from an underlying section of the Deep N-well by a region of intrinsic epitaxial silicon. An alternative reduced-size approach utilizes an open-ring deep trench isolation structure that surrounds the active switch region (e.g., the Deep N-well and P-Well), and includes a relatively small-sized N-Tap region formed in an open corner region of the isolation structure.

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