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    • 8. 发明申请
    • A FIDUCIAL FOR ALIGNING AN INTEGRATED CIRCUIT DIE
    • 用于整合集成电路的一种方法
    • WO9830913A3
    • 1998-10-01
    • PCT/US9722690
    • 1997-12-11
    • INTEL CORP
    • WINER PAUL GEORGELIVENGOOD RICHARD H
    • H01L23/544G01R
    • H01L23/544H01L2223/5442H01L2223/54473H01L2223/5448H01L2924/0002Y10S148/102Y10S438/975H01L2924/00
    • In one embodiment, the fiducial is configured to be exposed by laser chemical etching through a silicon substrate through the back side of a C4 packaged integrated circuit die. The presently described fiducial includes floating diffusion regions disposed in the substrate. An oxide layer free of metal contacts is disposed over the diffusion regions within the fiducial region of the integrated circuit. A metal pattern layer is disposed beneath the oxide layer to provide alignment information. The metal pattern layer is configured to be visible through the oxide layer after the silicon substrate has been removed from the fiducial region. A light block is disposed between the metal pattern layer and an underlying epoxy underfill layer to minimize the risk of an excessive amount of light from being exposed to the underlying epoxy layer, which minimizes the risk of the epoxy layer from damaging the integrated circuit from excessive light exposure. Since the presently described fiducial does not include any contacts in the oxide layer, the additional step of utilizing a focus ion beam mill is no longer necessary and the presently described fiducial therefore only needs to be etched with a laser chemical etcher to be exposed. 00000
    • 在一个实施例中,基准被配置为通过激光化学蚀刻通过硅衬底通过C4封装的集成电路管芯的背面暴露。 目前描述的基准包括设置在基板中的浮动扩散区域。 没有金属触点的氧化物层设置在集成电路的基准区域内的扩散区域上。 金属图案层设置在氧化物层下方以提供对准信息。 在从基准区域移除硅衬底之后,金属图案层被配置为通过氧化物层可见。 光块被布置在金属图案层和下面的环氧底层填充层之间以最小化暴露于下面的环氧树脂层的过量光的风险,这使得环氧树脂层不会损害集成电路的风险过大 曝光 由于目前描述的基准不包括氧化物层中的任何接触,所以不再需要利用聚焦离子束研磨机的附加步骤,因此目前描述的基准仅需要用激光化学蚀刻剂进行蚀刻来暴露。 00000
    • 10. 发明申请
    • A FIDUCIAL FOR ALIGNING AN INTEGRATED CIRCUIT DIE
    • 用于对齐集成电路的一种方法
    • WO1998030913A2
    • 1998-07-16
    • PCT/US1997022690
    • 1997-12-11
    • INTEL CORPORATION
    • INTEL CORPORATIONWINER, Paul, GeorgeLIVENGOOD, Richard, H.
    • G01R00/00
    • H01L23/544H01L2223/5442H01L2223/54473H01L2223/5448H01L2924/0002Y10S148/102Y10S438/975H01L2924/00
    • In one embodiment, the fiducial is configured to be exposed by laser chemical etching through a silicon substrate through the back side of a C4 packaged integrated circuit die. The presently described fiducial includes floating diffusion regions disposed in the substrate. An oxide layer free of metal contacts is disposed over the diffusion regions within the fiducial region of the integrated circuit. A metal pattern layer is disposed beneath the oxide layer to provide alignment information. The metal pattern layer is configured to be visible through the oxide layer after the silicon substrate has been removed from the fiducial region. A light block is disposed between the metal pattern layer and an underlying epoxy underfill layer to minimize the risk of an excessive amount of light from being exposed to the underlying epoxy layer, which minimizes the risk of the epoxy layer from damaging the integrated circuit from excessive light exposure. Since the presently described fiducial does not include any contacts in the oxide layer, the additional step of utilizing a focus ion beam mill is no longer necessary and the presently described fiducial therefore only needs to be etched with a laser chemical etcher to be exposed.
    • 在一个实施例中,基准被配置为通过激光化学蚀刻通过硅衬底通过C4封装集成电路管芯的背面进行暴露。 目前描述的基准包括设置在基板中的浮动扩散区域。 没有金属触点的氧化物层设置在集成电路的基准区域内的扩散区域上。 金属图案层设置在氧化物层下方以提供对准信息。 金属图案层被配置为在硅基板从基准区域移除之后通过氧化物层是可见的。 光块被布置在金属图案层和下面的环氧底层填充层之间以最小化暴露于下面的环氧树脂层的过量光的风险,这使得环氧树脂层不会损害集成电路的风险过大 曝光。 由于目前描述的基准点不包括氧化物层中的任何接触,所以不再需要利用聚焦离子束磨机的附加步骤,因此目前描述的基准仅需要用激光化学蚀刻器进行蚀刻来暴露。