Method of fabrication for single crystal piezoelectric RF resonators and filters

    公开(公告)号:US10466572B2

    公开(公告)日:2019-11-05

    申请号:US15679879

    申请日:2017-08-17

    Applicant: Dror Hurwitz

    Inventor: Dror Hurwitz

    Abstract: 1. A method of fabricating an RF filter comprising an array of resonators comprising the steps of: Obtaining a removable carrier with release layer; Growing a piezoelectric film on a removable carrier; Applying a first electrode to the piezoelectric film; Obtaining a backing membrane on a cover, with or without prefabricated cavities between the backing film and cover; Attaching the backing membrane to the first electrode; Detaching the removable carrier; Measuring and trimming the piezoelectric film as necessary; Selectively etching away the piezoelectric layer to fabricate discrete resonator islands; Etching down through coatings and backing membrane to a silicon dioxide layer between the backing membrane and the cover to form trenches; Applying a passivation layer into the trenches and around the piezoelectric islands; Depositing a second electrode layer over the piezoelectric film islands and surrounding passivation layer; Applying connections for subsequent electrical coupling to an interposer; Selectively removing second electrode material leaving coupled resonator arrays; Creating a gasket around perimeter of the resonator array; Thinning down cover to desired thickness; Optionally fabricating upper cavities between the backing membrane and cover by drilling holes through the cover and then selectively etching away the silicon dioxide; Dicing the wafer into flip chip single unit filter arrays; Obtaining an interposer; Optionally applying a dam to the interposer surface to halt overfill flow; Coupling the flip chip single unit filter array to pads of the interposer by reflow of the solder cap; Encapsulating with polymer underfill/overfill; and Singulating into separate filter modules, wherein wherein the piezoelectric layer comprises a mixed AlN single crystal layer a c-axis orientation.

    METHOD OF FABRICATION FOR SINGLE CRYSTAL PIEZOELECTRIC RF RESONATORS AND FILTERS

    公开(公告)号:US20180275485A1

    公开(公告)日:2018-09-27

    申请号:US15679879

    申请日:2017-08-17

    Applicant: Dror Hurwitz

    Inventor: Dror Hurwitz

    Abstract: 1. A method of fabricating an RF filter comprising an array of resonators comprising the steps of: Obtaining a removable carrier with release layer; Growing a piezoelectric film on a removable carrier; Applying a first electrode to the piezoelectric film; Obtaining a backing membrane on a cover, with or without prefabricated cavities between the backing film and cover; Attaching the backing membrane to the first electrode; Detaching the removable carrier; Measuring and trimming the piezoelectric film as necessary; Selectively etching away the piezoelectric layer to fabricate discrete resonator islands; Etching down through coatings and backing membrane to a silicon dioxide layer between the backing membrane and the cover to form trenches; Applying a passivation layer into the trenches and around the piezoelectric islands; Depositing a second electrode layer over the piezoelectric film islands and surrounding passivation layer; Applying connections for subsequent electrical coupling to an interposer; Selectively removing second electrode material leaving coupled resonator arrays; Creating a gasket around perimeter of the resonator array; Thinning down cover to desired thickness; Optionally fabricating upper cavities between the backing membrane and cover by drilling holes through the cover and then selectively etching away the silicon dioxide; Dicing the wafer into flip chip single unit filter arrays; Obtaining an interposer; Optionally applying a dam to the interposer surface to halt overfill flow; Coupling the flip chip single unit filter array to pads of the interposer by reflow of the solder cap; Encapsulating with polymer underfill/overfill; and Singulating into separate filter modules, wherein wherein the piezoelectric layer comprises a mixed AlN single crystal layer a c-axis orientation.

    Multilayer electronic structures with vias having different dimensions
    3.
    发明授权
    Multilayer electronic structures with vias having different dimensions 有权
    具有不同尺寸的通孔的多层电子结构

    公开(公告)号:US08816218B2

    公开(公告)日:2014-08-26

    申请号:US13482074

    申请日:2012-05-29

    Applicant: Dror Hurwitz

    Inventor: Dror Hurwitz

    Abstract: A multilayer composite electronic structure comprising at least two feature layers extending in an X-Y plane and separated by a via layer comprising a dielectric material that is sandwiched between two adjacent feature layers, the via layer comprising via posts that couple adjacent feature layers in a Z direction perpendicular to the X-Y plane, wherein a first via has different dimensions in the X-Y plane from a second via in the via layer.

    Abstract translation: 一种多层复合电子结构,包括至少两个特征层,所述特征层在XY平面中延伸并且由包含夹在两个相邻特征层之间的电介质材料的通孔层隔开,所述通孔层包括通孔,所述通孔在Z方向上连接相邻的特征层 垂直于XY平面,其中第一通孔在XY平面中具有与通孔层中的第二通孔不同的尺寸。

    MULTILAYER ELECTRONIC STRUCTURE WITH STEPPED HOLES
    4.
    发明申请
    MULTILAYER ELECTRONIC STRUCTURE WITH STEPPED HOLES 有权
    带阶梯的多层电子结构

    公开(公告)号:US20130333934A1

    公开(公告)日:2013-12-19

    申请号:US13523116

    申请日:2012-06-14

    Abstract: A multilayer electronic structure comprising a plurality of layers extending in an X-Y plane consisting of a dielectric material surrounding metal via posts that conduct in a Z direction perpendicular to the X-Y plane, wherein at least one multilayered hole crosses at least two layers of the plurality of layers and comprises at least two hole layers in adjacent layers of the multilayer composite electronic structure, wherein the at least two holes in adjacent layers have different dimensions in the X-Y plane, such that a perimeter of the multilayered hole is stepped and where at least one hole is an aperture to a surface of the multilayer electronic structure.

    Abstract translation: 一种多层电子结构,包括在XY平面中延伸的多个层,所述多个层由围绕金属通孔的介电材料构成,所述介电材料围绕垂直于所述XY平面的Z方向传导,其中至少一个多层孔穿过所述多个 层,并且在多层复合电子结构的相邻层中包括至少两个孔层,其中相邻层中的至少两个孔在XY平面中具有不同的尺寸,使得多层孔的周边是阶梯状的,并且其中至少一个 孔是多层电子结构的表面的孔。

    Method for fabricating RF resonators and filters

    公开(公告)号:US10439580B2

    公开(公告)日:2019-10-08

    申请号:US15468766

    申请日:2017-03-24

    Applicant: Dror Hurwitz

    Inventor: Dror Hurwitz

    Abstract: A method of fabricating an RF filter comprising an array of resonators, the method comprising the steps of: (a) Obtaining a removable carrier with release layer; (b) Growing a piezoelectric film on a removable carrier; (c) Applying a first electrode to the piezoelectric film; (d) Obtaining a backing membrane on a cover, with or without prefabricated cavities between the backing film and cover; (e) Attaching the backing membrane to the first electrode; (f) Detaching the removable carrier; (g) Measuring and trimming the piezoelectric film as necessary; (h) Selectively etching away the piezoelectric layer to fabricate discrete resonator islands; (i) Etching down through coatings backing membrane, silicon dioxide and into silicon handle to form trenches; (j) Applying passivation layer into the trenches and around the piezoelectric islands; (k) Depositing a second electrode layer over the dielectric and piezoelectric film islands; (l) Applying connections for subsequent electrical coupling to an interposer; (m) Selectively remove second electrode material leaving coupled resonator arrays; (n) Create gasket around perimeter of the resonator array; (o) Thinning down cover of handle to desired thickness; (p) Optionally fabricating cavities between the silicon membrane and handle; (q) Dicing the wafer into flip chip single unit filter arrays; (r) Obtaining an interposer; (s) Optionally applying a dam to the interposer surface to halt overfill flow; (t) Coupling the flip chip single unit filter array to pads of the interposer by reflow of the solder cap; (u) Encapsulating with polymer overfill; and (v) Singulating into separate filter modules.

    Chip carrier substrate
    10.
    发明授权
    Chip carrier substrate 有权
    芯片载体衬底

    公开(公告)号:US06262376B1

    公开(公告)日:2001-07-17

    申请号:US09372601

    申请日:1999-08-12

    Abstract: A chip carrier substrate including a lower layer and at least one upper layer of copper conductors on a base, a plurality of aluminum studs formed by anodization to be of substantially identical height which interconnect the layers of conductors, a layer of barrier metal electrically connecting the aluminum studs and the copper conductors to prevent direct contact therebetween, the aluminum studs and at least the upper layer of copper conductor being surrounded by a polymeric dielectric material, and a layer of adhesion/barrier metal beneath the upper copper conductor layer, between the upper copper conductor layer and the dielectric material.

    Abstract translation: 一种芯片载体基板,包括下层和至少一层铜导体的基底上的多个铝螺柱,通过阳极氧化形成的具有基本上相同的高度的多个铝螺柱,其互连导体层,一层阻挡金属电连接 铝螺柱和铜导体,以防止它们之间的直接接触,铝螺柱和至少铜导体的上层被聚合物电介质材料包围,并且在上部铜导体层下面的上部铜导体层之间的粘附/阻挡金属层 铜导体层和电介质材料。

Patent Agency Ranking