公开(公告)号：US20180281425A1

公开(公告)日：2018-10-04

申请号：US15765255

申请日：2016-01-20

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

Inventor： Zhizhang Chen ,  Mohammed Shaarawi ,  Brian Bolf ,  Paul Krause

IPC: B41J2/175 ,  B41J2/14 ,  B41J2/16 ,  B41J2/335

Abstract: Energy efficient printheads are disclosed. An example printhead includes a substrate with channels to direct ink toward a plurality of nozzles of the printhead. The example printhead further includes a passivation layer on the substrate. The passivation layer includes a first thin film of a first dielectric material formed using atomic layer deposition.

公开(公告)号：US20240293861A1

公开(公告)日：2024-09-05

申请号：US18575195

申请日：2021-07-09

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

Inventor： David R. Otis, Jr. ,  Vladek Kasperchik ,  Mohammed Shaarawi

IPC: B22F1/14 ,  B22F1/052 ,  B22F1/065 ,  B22F10/14 ,  B33Y10/00 ,  B33Y30/00 ,  B33Y40/10

CPC classification number: B22F1/14 ,  B22F1/052 ,  B22F1/065 ,  B22F10/14 ,  B33Y10/00 ,  B33Y30/00 ,  B33Y40/10

Abstract: Methods of preparing a particulate build material for three-dimensional printing can include loading fresh particulate build material including from about 80 wt % to 100 wt % fresh metal particles into a mechanical mixer, and mechanically conditioning the fresh particulate build material to generate conditioned particulate build material including conditioned metal particles. The fresh metal particles can have a surface oxide layer, and the fresh particulate build material can have a particle size distribution with a D10 particle size from about 2 μm to about 10 μm, a D50 particle size from about 5 μm to about 20 μm, and a D90 particle size from about 20 μm to about 40 μm. The conditioned particulate build material can include a modified cohesive index (compared to the fresh conditioned particulate build material) ranging from about 25 cohesive index units to about 35 cohesive index units.

公开(公告)号：US10479094B2

公开(公告)日：2019-11-19

申请号：US15765255

申请日：2016-01-20

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

Inventor： Zhizhang Chen ,  Mohammed Shaarawi ,  Brian Bolf ,  Paul Krause

IPC: B41J2/16 ,  B41J2/175 ,  B41J2/14 ,  B41J2/335

Abstract: Energy efficient printheads are disclosed. An example printhead includes a substrate with channels to direct ink toward a plurality of nozzles of the printhead. The example printhead further includes a passivation layer on the substrate. The passivation layer includes a first thin film of a first dielectric material formed using atomic layer deposition.