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    PRINTHEAD WITH RECESSED SLOT ENDS
    2.
    发明申请
    PRINTHEAD WITH RECESSED SLOT ENDS 有权
    带接收槽的PRINTHEAD

    公开(公告)号：US20150001316A1

    公开(公告)日：2015-01-01

    申请号：US14374160

    申请日：2012-03-16

    Applicant: Hewlett-Packard Development Company, L.P.

    Inventor： Rio Rivas ,  Ed Friesen ,  Terry McMahon ,  Donald W. Schulte ,  David Douglas Hall

    IPC: B05B15/06

    CPC classification number: B05B15/60 ,  B41J2/14145 ,  B41J2/1433 ,  B41J2/1603 ,  B41J2/1628 ,  B41J2/1629 ,  B41J2/1631 ,  B41J2/1634 ,  B41J2/1642 ,  Y10T29/49401

    Abstract: In an embodiment, a method of forming a printhead includes forming on a front-side surface of a substrate, a thin film layer and a plurality of fluidic channels and ejection chambers. The method also includes forming a slot through the substrate from the back-side surface to the front-side surface, where the back-side and front-side surfaces generally oppose one another. The slot has a length extending along a long axis of the substrate and a width extending along a short axis of the substrate. The method includes forming recessed regions into the back-side surface of the substrate at both ends of the slot that extend beyond the length of the slot.

    Abstract translation: 在一个实施例中，形成打印头的方法包括在基板的前侧表面上形成薄膜层和多个流体通道和喷射室。 该方法还包括从后侧表面到前侧表面通过基板形成槽，其中后侧表面和前侧表面通常彼此相对。 槽具有沿衬底的长轴延伸的长度和沿衬底的短轴延伸的宽度。 该方法包括在槽的两端延伸超过槽的长度的方式，在基板的背侧表面中形成凹陷区域。

    FLUIDIC DIES WITH BEVELED EDGES UNDERNEATH ELECTRICAL LEADS
    4.
    发明申请
    FLUIDIC DIES WITH BEVELED EDGES UNDERNEATH ELECTRICAL LEADS 有权

    公开(公告)号：US20210170746A1

    公开(公告)日：2021-06-10

    申请号：US16760923

    申请日：2018-01-23

    Applicant: Hewlett-Packard Development Company, L.P.

    Inventor： Stan E. Leigh ,  Kellie Susanne Jensen ,  Terry McMahon ,  Donald W. Schulte

    IPC: B41J2/14 ,  B41J2/175

    Abstract: In one example in accordance with the present disclosure, a fluidic die is described. The fluidic die includes a surface on which a number of nozzles are formed. An electrical interface on the fluidic die establishes an electrical connection between the fluidic die and a fluidic die controller. The electrical interface includes 1) a bond pad disposed within a bond pad region of the surface and 2) an electrical lead coupled to the bend pad to establish an electrical connection between the fluidic die and the fluidic die controller. The fluidic die also includes a beveled edge along an edge of the surface underneath the electrical lead.

    Fluidic die with monitoring circuit fault protection
    8.
    发明授权
    Fluidic die with monitoring circuit fault protection 有权

    公开(公告)号：US11173708B2

    公开(公告)日：2021-11-16

    申请号：US17045512

    申请日：2018-05-15

    Applicant: Hewlett-Packard Development Company, L.P.

    Inventor： Eric Martin ,  Terry McMahon ,  Donald W. Schulte

    IPC: B41J2/045 ,  B41J2/14

    Abstract: A fluidic die includes a plurality of fluid chambers, each fluid chamber including an electrode exposed to an interior of the fluid chamber and having a corresponding fluid actuator operating a high voltage separated from the fluid chamber and electrode by an insulating material, and monitoring circuitry, operating at a low voltage, to monitor a condition of each fluid chamber. For each fluid chamber the monitoring circuitry includes a sense node and a conductor connecting the electrode to the sense node, the conductor having a geometry to form at least one region of higher current density relative to remaining portions of the conductor, the at least one region of higher current density to fail and create an open to protect the low-voltage monitoring circuitry in response to a fault current caused by a short circuit of the high voltage fluid actuator to the electrode.

    FLUIDIC DIE WITH MONITORING CIRCUIT FAULT PROTECTION
    9.
    发明申请
    FLUIDIC DIE WITH MONITORING CIRCUIT FAULT PROTECTION 有权

    公开(公告)号：US20210162741A1

    公开(公告)日：2021-06-03

    申请号：US17045512

    申请日：2018-05-15

    Applicant: Hewlett-Packard Development Company, L.P.

    Inventor： Eric Martin ,  Terry McMahon ,  Donald W. Schulte

    IPC: B41J2/045 ,  B41J2/175 ,  B41J2/14

    Abstract: A fluidic die includes a plurality of fluid chambers, each fluid chamber including an electrode exposed to an interior of the fluid chamber and having a corresponding fluid actuator operating a high voltage separated from the fluid chamber and electrode by an insulating material, and monitoring circuitry, operating at a low voltage, to monitor a condition of each fluid chamber. For each fluid chamber the monitoring circuitry includes a sense node and a conductor connecting the electrode to the sense node, the conductor having a geometry to form at least one region of higher current density relative to remaining portions of the conductor, the at least one region of higher current density to fail and create an open to protect the low-voltage monitoring circuitry in response to a fault current caused by a short circuit of the high voltage fluid actuator to the electrode.

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