公开(公告)号：US20210372925A1

公开(公告)日：2021-12-02

申请号：US17059732

申请日：2019-02-22

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

Inventor： Alexander Govyadinov ,  Brett E. Dahlgren

IPC: G01N21/64 ,  B01L3/00

Abstract: A nucleic acid detection device includes a microfluidic opening and a sensor stack. The sensor stack includes an electrochemical electrode and a photodetector. The electrochemical electrode is formed of a conductive material that is transparent to a fluorescent emission, the electrochemical electrode including a first side and an opposite second side, wherein the first side is exposed to the microfluidic opening. The photodetector is positioned relative to the second side of the electrochemical electrode to optically receive the fluorescent emission when passed through the electrochemical electrode.

公开(公告)号：US10207508B2

公开(公告)日：2019-02-19

申请号：US15704483

申请日：2017-09-14

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

Inventor： Chien-Hua Chen ,  Michael W. Cumbie ,  Brett E. Dahlgren

IPC: B41J2/165 ,  B41J2/14 ,  B41J2/16

Abstract: In some examples, a print cartridge includes a monolithic molding, and a printhead die embedded into a molding. The printhead die has a front surface exposed outside the molding to dispense fluid drops through nozzles and an opposing back surface covered by the molding except at a channel in the molding through which fluid is to pass directly to the back surface. The printhead die also has a nozzle health sensor molded into the molding to detect defective nozzles in the printhead die.