公开(公告)号：US20210087675A1

公开(公告)日：2021-03-25

申请号：US17047015

申请日：2018-06-13

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

Inventor： Robert Ionescu ,  Helen A Holder ,  Nina Ge ,  Jarrid Wittkopf

IPC: C23C16/04 ,  C23C16/26 ,  C23C16/48 ,  C23C16/30 ,  C01B32/186

Abstract: Graphene printing is disclosed. A disclosed example graphene printing apparatus includes a gas source to cause a graphene precursor gas to flow across a surface of a substrate, and a localized heat source to locally heat portions of the surface to cause graphene to grow at the portions of the surface based on a printing pattern.

公开(公告)号：US11423277B2

公开(公告)日：2022-08-23

申请号：US16076273

申请日：2017-02-07

Applicant: HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P.

Inventor： Ning Ge ,  Jarrid Wittkopf ,  Robert Ionescu ,  Helen A. Holder ,  Paul Howard Mazurkiewicz

IPC: G06K19/077 ,  G06K19/067 ,  H01Q1/22 ,  H01Q1/38 ,  H04B5/00 ,  H05K1/03 ,  H05K1/09

Abstract: In some examples, a fluidic conductive trace based radio-frequency identification device may include a flexible substrate layer including a channel, and a trace formed of a conductive fluid that is disposed substantially within the channel. The fluidic conductive trace based radio-frequency identification device may further include a sealing layer disposed on the flexible substrate layer and the trace to seal the conductive fluid in a liquid state within the channel.

公开(公告)号：US11200478B2

公开(公告)日：2021-12-14

申请号：US16760951

申请日：2018-01-25

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

Inventor： Robert Ionescu ,  Ning Ge ,  Helen A. Holder ,  Jarrid Wittkopf

IPC: G06K19/077 ,  B65D5/20 ,  B65D5/42 ,  G06K7/10 ,  G06K19/07

Abstract: An RFID security device for product packaging is disclosed. The security device includes an RFID tag disposed on a first portion of a product package, and a booster antenna disposed on a second portion of the product package. The RFID tag and booster antenna are positioned on the product package so that the RFID tag will be electromagnetically coupled to the booster antenna when the product package is closed, and the RFID tag will be decoupled from the booster antenna when the product package is open.

公开(公告)号：US20210343527A1

公开(公告)日：2021-11-04

申请号：US17286574

申请日：2018-12-10

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

Inventor： Robert Ionescu ,  Helen A. Holder ,  Jarrid Wittkopf

IPC: H01L21/02 ,  C23C18/12

Abstract: A method that includes selectively ejecting, from a first nozzle, a patterning material on to a surface of a substrate to define an area within to eject a first printable ammonium-based chalcogenometalate fluid; ejecting, from a second nozzle, the first printable ammonium-based chalcogenometalate fluid within the area defined by the patterning material to form a first layer of the printable ammonium-based chalcogenometalate fluid; and heating the first layer of printable ammonium-based chalcogenometalate fluid to dissipate the first printable ammonium-based chalcogenometalate fluid into a transition metal dichalcogenide having the form MX2.

公开(公告)号：US20210253441A1

公开(公告)日：2021-08-19

申请号：US17262353

申请日：2018-11-08

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

Inventor： Robert Ionescu ,  Helen A. Holder ,  Jarrid Wittkopf

IPC: C01G41/00 ,  C01G39/00 ,  C09D11/38 ,  H01L21/02 ,  B41J2/05

Abstract: A printable ammonium-based chalcogenometalate fluid may include an ammonium-based chalcogenometalate precursor; an aqueous solvent; water; and a dopant; wherein, in the presence of heat, the printable ammonium-based chalcogenometalate fluid dissipates to form a transition metal dichalcogenide having the form MX2 with the dopant distributed therethrough.

公开(公告)号：US10521711B1

公开(公告)日：2019-12-31

申请号：US16463525

申请日：2017-02-22

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

Inventor： Ning Ge ,  Jarrid Wittkopf ,  Robert Ionescu ,  Helen A. Holder ,  Paul Howard Mazurkiewicz

IPC: G06K19/073 ,  G06K7/10

Abstract: In some examples, a controllable read blocking based radio-frequency identification (RFID) device may include a substrate layer, and a trace formed of a conductive material and disposed on, partially within, or fully within the substrate layer. The controllable read blocking based RFID device may further include a controllable read blocking layer disposed on the substrate layer and the trace and including a fluid disposed in the controllable read blocking layer to selectively block or allow passage of electromagnetic waves to the trace to respectively inhibit or allow communication of a RFID reading device with the controllable read blocking based RFID device.

公开(公告)号：US20190377994A1

公开(公告)日：2019-12-12

申请号：US16463525

申请日：2017-02-22

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

Inventor： Ning Ge ,  Jarrid Wittkopf ,  Robert Ionescu ,  Helen A. Holder ,  Paul Howard Mazurkiewicz

IPC: G06K19/073 ,  G06K7/10

Abstract: In some examples, a controllable read blocking based radio-frequency identification (RFID) device may include a substrate layer, and a trace formed of a conductive material and disposed on, partially within, or fully within the substrate layer. The controllable read blocking based RFID device may further include a controllable read blocking layer disposed on the substrate layer and the trace and including a fluid disposed in the controllable read blocking layer to selectively block or allow passage of electromagnetic waves to the trace to respectively inhibit or allow communication of a RFID reading device with the controllable read blocking based RFID device.