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公开(公告)号：US10369788B2
公开(公告)日：2019-08-06
申请号：US15379562
申请日：2016-12-15
Applicant: Hewlett-Packard Development Company, L.P.
Inventor： Rio Rivas , Ed Friesen , Terry McMahon , Donald W. Schulte , David Douglas Hall
Abstract: A fluid ejection device may include a substrate having front and back opposing surfaces and a slot extending through the substrate between the back and front surfaces and along an axis of the substrate. A recessed end region may be formed in the back surface at each end of the slot.
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公开(公告)号：US20190210366A1
公开(公告)日：2019-07-11
申请号：US16301132
申请日：2016-08-03
Applicant: HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P.
Inventor： Anthony M Fuller , Terry McMahon , Donald W Schulte , Amy Gault
CPC classification number: B41J2/1433 , B41J2/14072 , B41J2/1601 , B41J2/162 , B41J2/1629 , B41J2/1634 , B41J2002/14491 , G01N27/20
Abstract: A conductive wire disposed in a layer is described. An example apparatus includes a die including a silicon layer and a first layer coupled to the silicon layer. The example apparatus a conductive wire disposed in the first layer adjacent a perimeter of a location at which a fluid feed slot is to be formed in the silicon layer. The conductive wire has an electrical characteristic that corresponds to whether the fluid feed slot is defective.
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公开(公告)号：US20170313065A1
公开(公告)日：2017-11-02
申请号：US15520743
申请日：2014-10-30
Applicant: HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P.
Inventor： Donald W Schulte , Terry McMahon , Tony Fuller , Stan E Leigh
Abstract: A fluid ejecting device including a die including a perimeter defined by a first edge, a second edge opposing the first edge, a third edge, and a fourth edge opposing the third edge, wherein the third and fourth edges are disposed at an angle to the first and second edges to form angular corners, an active area including circuitry for controlling the fluid ejecting device to eject fluid, an inactive area positioned between the perimeter and the active area, and a termination ring encircling the active area, the termination ring including sides extending parallel to the first, second, third, and fourth edges and corners coupling adjacent sides, the corners having a corner radius greater than a first distance between the first edge and one of the sides of the termination ring, and a nozzle to eject fluid.
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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。
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公开(公告)号：US20210146695A1
公开(公告)日：2021-05-20
申请号：US17046877
申请日：2018-05-15
Applicant: Hewlett-Packard Development Company, L.P.
Inventor： Eric Martin , Terry McMahon , Donald W Schulte
IPC: B41J2/175 , H01L23/62 , H01L29/06 , H01L27/092
Abstract: A fluidic die includes fluid chambers, each including an electrode exposed to an interior of the fluid chamber and each having a corresponding fluid actuator operating at a high voltage. The fluidic die further includes monitoring circuitry, operating at a low voltage relative to the fluid actuator, to monitor a condition of each fluid chamber, for each chamber the monitoring circuitry including a connection structure and a select transistor and a pulldown transistor connected to the electrode via the connection structure. The connection structure and select and pulldown transistors together structured to form electrically conductive paths with electrical resistances to protect at least the select transistor from fault damage if the high voltage fluid actuator short-circuits to the electrode.
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Patent Agency Ranking
公开(公告)号：US20200269581A1
公开(公告)日：2020-08-27
申请号：US16305528
申请日：2016-09-19
Applicant: HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P.
Inventor： Anthony M Fuller , Terry McMahon , Donald W Schulte
Abstract: In one example in accordance with the present disclosure, a fluid ejection device is described. The fluid ejection device includes a substrate and a number of nozzles formed within the substrate to eject fluid. A number of bond pads are disposed on the substrate and are electrically coupled to the number of rows of nozzles. A termination ring is disposed on the substrate and surrounds the rows of nozzles. The termination ring includes a first metallic layer that is an enclosed shape and a second metallic layer that is disposed on top of the first metallic layer. The second metallic layer includes a gap positioned adjacent the number of bond pads.
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公开(公告)号：US10421275B2
公开(公告)日：2019-09-24
申请号：US15520743
申请日：2014-10-30
Applicant: HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P.
Inventor： Donald W Schulte , Terry McMahon , Tony Fuller , Stan E Leigh
Abstract: A fluid ejecting device including a die including a perimeter defined by a first edge, a second edge opposing the first edge, a third edge, and a fourth edge opposing the third edge, wherein the third and fourth edges are disposed at an angle to the first and second edges to form angular corners, an active area including circuitry for controlling the fluid ejecting device to eject fluid, an inactive area positioned between the perimeter and the active area, and a termination ring encircling the active area, the termination ring including sides extending parallel to the first, second, third, and fourth edges and corners coupling adjacent sides, the corners having a corner radius greater than a first distance between the first edge and one of the sides of the termination ring, and a nozzle to eject fluid.
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公开(公告)号：US20190248157A1
公开(公告)日：2019-08-15
申请号：US16323219
申请日：2016-10-20
Applicant: HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P.
Inventor： Reynaldo V Villavelez , Terry McMahon , Donald W Schulte
CPC classification number: B41J2/345 , B41J2/3358
Abstract: In some examples, a heater assembly for a pattern forming system includes a support, and heating elements mounted on the support, where the heating elements are to, in response to activation of the heating element, produce heat directed towards a target to form a pattern on the target. A heat sink is thermally connected to the heating elements and comprising a pattern of heat dissipation surfaces comprising channels to dissipate heat produced by the heating elements.
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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
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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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
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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