公开(公告)号：DE69813121T2

公开(公告)日：2003-10-16

申请号：DE69813121

申请日：1998-06-12

Applicant: XEROX CORP

Inventor： MARKHAM ROGER G ,  ANDREWS JOHN R ,  KNEEZEL GARY A

IPC: B41J2/05 ,  B41J2/14 ,  B41J2/16 ,  B41J2/175

公开(公告)号：CA2138418A1

公开(公告)日：1995-10-01

申请号：CA2138418

申请日：1994-12-19

Applicant: XEROX CORP

Inventor： STEPHANY JOSEPH F ,  BECERRA JUAN J ,  JOHN PETER J ,  KNEEZEL GARY A ,  LADONNA RICHARD V ,  WATROBSKI THOMAS E ,  WYSOCKI JOSEPH J

IPC: B41J2/05 ,  B41J2/355

公开(公告)号：MX9306481A

公开(公告)日：1994-06-30

申请号：MX9306481

申请日：1993-10-19

Applicant: XEROX CORP

Inventor： IMS DALE R ,  O'HORO MICHAEL P ,  KNEEZEL GARY A ,  TELLIER THOMAS A ,  REZANKA IVAN ,  BURKE CATHIE J ,  DESHPANDE NARAYAN V ,  HAWKINS WILLIAM G

IPC: B41J2/05 ,  B41J2/14 ,  B41J2/16 ,  B41L1/00

Abstract: A heater element for a printhead for an ink jet printing system has a pit layer (22) which protects the overglaze passivation layer (20), PSG step region (10), portions of the Ta layer (14) and dielectric isolation layer (12) and junctions or regions susceptible to the cavitational pressures. The inner walls (23) of the pit layer define the effective heater area and dopant lines (9) within the heater resistor (8) define the actual heater area. In an alternative arrangement, the dopant lines define both the actual and effective heater areas, and in yet another arrangement, one inner wall and one dopant line define the effective heater area. When a plurality of the heater elements are incorporated into a printhead having either full pit channel geometry and open pit channel geometry, the operating lifetime of the printhead is extended because the added protection of the pit layer prevents: 1) passivation damage and cavitational damages of the heater elements; and 2) degradation of heater robustness, hot spot formations and heater failures well into the 109 pulse range. The printhead can be incorporated into a drop-on-demand printing system of a carriage type or a full width type.

公开(公告)号：BR9800334A

公开(公告)日：1999-08-10

申请号：BR9800334

申请日：1998-01-15

Applicant: XEROX CORP

Inventor： KUHMAN DANIEL E ,  KNEEZEL GARY A ,  JOHN PETER J

IPC: B41J2/16

公开(公告)号：DE69010598T2

公开(公告)日：1995-01-19

申请号：DE69010598

申请日：1990-09-05

Applicant: XEROX CORP

Inventor： BLESSINGTON DANIEL R ,  KNEEZEL GARY A ,  CAMPANELLI MICHAEL R

IPC: B41J2/05 ,  B41J2/16 ,  H01L21/36 ,  H01L23/14 ,  H01L23/373 ,  H05K1/05

公开(公告)号：DE69011640D1

公开(公告)日：1994-09-22

申请号：DE69011640

申请日：1990-12-18

Applicant: XEROX CORP

Inventor： KNEEZEL GARY A

IPC: B41J2/05 ,  B41J2/12 ,  B41J2/14 ,  B41J2/16 ,  B41J2/365

Abstract: An ink jet printhead is fabricated with a resistive temperature sensor (50) formed adjacent to the heater resistors (44) and, in a preferred embodiment, of the same material. Temperature sensing variations between a plurality of printheads used in the same printer is achieved by trimming the thermistors to the desired resistance value while holding each printhead at its nominal set temperature. In one embodiment, the heater resistor and thermistor are formed within the same polysilicon layer, and the resistor trimmed therein. In a second embodiment, a thick or thin film resistor (58) is formed or bonded in series with the polysilicon thermistor, with the trimming being effected of the thick or thin film resistor.

公开(公告)号：CA1321360C

公开(公告)日：1993-08-17

申请号：CA608628

申请日：1989-08-17

Applicant: XEROX CORP

Inventor： KNEEZEL GARY A ,  DRAKE DONALD J ,  FISHER ALMON P

IPC: B01D29/01 ,  B41J2/16 ,  B41J2/175 ,  B41J2/17

Abstract: Relatively small fluid handling devices having a filter bonded on the surface containing the fluid inlets. An example of such a device is a thermal ink jet printhead. A substantially flat filter is placed at the ink inlet to the printhead by a fabrication process which laminates a wafer sized filter to the aligned and bonded wafers containing a plurality of printheads. The individual printheads are obtained by a sectioning operation, which cuts through the two or more bonded wafers and the filter. The filter may be a woven mesh screen or, preferably, an electroformed screen with a predetermined pore size. Since the filter covers one entire side of the printhead, the relatively large contact area prevents delamination and enables convenient leak-free sealing. The filter prevents the entrance of contaminants into the relatively large inlets of the printhead at an early stage of assembly and packaging.

公开(公告)号：CA2029528C

公开(公告)日：1992-09-29

申请号：CA2029528

申请日：1990-11-08

Applicant: XEROX CORP

Inventor： KNEEZEL GARY A ,  BLESSINGTON DANIEL R

IPC: B41J2/175 ,  B41J2/05 ,  B41J2/12 ,  B41J2/365 ,  B41J2/125

Abstract: In a printhead die-bonded to a substrate, a recess, in a preferred embodiment, is formed in the substrate and layers of resistive material separated by a dielectric layer are formed in the recess by a thick film screen print process. The recess underlies the printhead which remains bonded to the substrate along the edges of the recess. This arrangement provides good proximity of the heater and the temperature sensor to the printhead enabling measurements to be made and sent to a control circuit which regulates heater operation to maintain the printhead within a desired operating range. The configuration also allows precise positioning of the printhead with the metal surface as a reference.

公开(公告)号：CA2029527A1

公开(公告)日：1991-06-19

申请号：CA2029527

申请日：1990-11-08

Applicant: XEROX CORP

Inventor： KNEEZEL GARY A

IPC: B41J2/05 ,  B41J2/12 ,  B41J2/14 ,  B41J2/16 ,  B41J2/365 ,  B41J2/125

Abstract: An ink jet printhead is fabricated with a resistive temperature sensor (50) formed adjacent to the heater resistors (44) and, in a preferred embodiment, of the same material. Temperature sensing variations between a plurality of printheads used in the same printer is achieved by trimming the thermistors to the desired resistance value while holding each printhead at its nominal set temperature. In one embodiment, the heater resistor and thermistor are formed within the same polysilicon layer, and the resistor trimmed therein. In a second embodiment, a thick or thin film resistor (58) is formed or bonded in series with the polysilicon thermistor, with the trimming being effected of the thick or thin film resistor.

公开(公告)号：DE69617594T2

公开(公告)日：2002-05-02

申请号：DE69617594

申请日：1996-09-20

Applicant: XEROX CORP

Inventor： MANTELL DAVID A ,  O'NEILL JAMES F ,  TELLIER THOMAS A ,  DESHPANDE NARAYAN V ,  KNEEZEL GARY A ,  TORPEY PETER A ,  HARRINGTON STEVEN J

IPC: B41J2/01 ,  B41J2/05 ,  B41J2/13 ,  B41J2/14 ,  B41J2/205

Abstract: A liquid ink printing apparatus printing images includes a printhead (20) having a plurality of nozzles (74) wherein a single power pulse causes two or more nozzles to eject ink simultaneously. The printhead includes an ink directing element (78) having a plurality of ink conduits coupled to an array of spaced nozzles and a transducer element (77) aligned with and mated to the ink directing element. The transducers are spaced a distance apart and each transducer is substantially aligned with at least two or more of the nozzles. The printhead is stepped in a direction transverse to the array of spaced nozzles a stepping distance approximately equal to or less than the distance between transducers. The ink directing element includes a silicon wafer having etched ink conduits or channels holding ink for ejection through the nozzles connected thereto. In one embodiment, each transducer is cooperatively associated with one channel having a fork member coupled to two or more nozzles or is cooperatively associated with two or more channels wherein each channel is connected to one or more nozzles.