Source: https://patents.google.com/patent/US7182436B2/en
Timestamp: 2018-06-21 13:08:32
Document Index: 685261242

Matched Legal Cases: ['ART01', 'ART02', 'ART03', 'ART04', 'ART06', 'ART07', 'ART08', 'ART09', 'ART10', 'ART13', 'ART15', 'ART16', 'ART18', 'ART19', 'ART20', 'ART21', 'ART22', 'ART25', 'ART26', 'ART27', 'ART29', 'ART30', 'ART31', 'ART33', 'ART38', 'ART43', 'ART45', 'ART46', 'ART47', 'ART48', 'ART50', 'ART51', 'ART53', 'ART56', 'ART57', 'ART59', 'ART60', 'ART62', 'ART63', 'ART65', 'ART66', 'ART68', 'ART69']

US7182436B2 - Ink jet printhead chip with volumetric ink ejection mechanisms - Google Patents
Ink jet printhead chip with volumetric ink ejection mechanisms Download PDF
US7182436B2
US7182436B2 US11202331 US20233105A US7182436B2 US 7182436 B2 US7182436 B2 US 7182436B2 US 11202331 US11202331 US 11202331 US 20233105 A US20233105 A US 20233105A US 7182436 B2 US7182436 B2 US 7182436B2
Expired - Fee Related, expires 2018-07-14
US11202331
US20050270336A1 (en )
Gregory John McAvoy
An inkjet printhead chip includes a substrate that defines a plurality of ink supply channels. A drive circuitry layer is positioned in the substrate. A plurality of nozzle arrangements is positioned on the substrate. Each nozzle arrangement includes a nozzle chamber structure arranged on the substrate and defining walls of a nozzle chamber in fluid communication with a respective ink supply channel. A deformable roof structure is arranged on the nozzle chamber structure. The roof structure is deformable on receipt of an actuating signal from the drive circuitry, reciprocally to reduce and enlarge a volume of the nozzle chamber. The roof structure defines an ink ejection port such that, upon such reduction and enlargement, a drop of ink is ejected from the ink ejection port.
This application is a continuation application of U.S. Ser. No. 10/728,796, filed on Dec. 8, 2003, now issued as U.S. Pat. No. 6,966,633, which is a continuation of U.S. Ser. No. 10/303,291 filed on Nov. 23, 2002, now issued as U.S. Pat. No. 6,672,708, which is a Continuation of U.S. Ser. No. 09/855,093 filed May 14, 2001, now issued as U.S. Pat. No. 6,505,912, which is a Continuation of U.S. Ser. No. 09/112,806 filed Jul. 10, 1998, now issued as U.S. Pat. No. 6,247,790.
The following Australian provisional patent applications are hereby incorporated by cross-reference. For the purposes of location and identification, US patent applications identified by their US patent application Ser. Nos. (USSN) or patent Numbers are listed alongside the Australian applications from which the US patent applications claim the right of priority.
U.S. PAT. NOS./
CROSS-REFERENCED OF PRIORITY
AUSTRALIAN FROM AUSTRALIAN
PROVISIONAL PATENT PROVISIONAL
APPLICATION NO. APPLICATION) DOCKET NO.
PO7991 6,750,901 ART01
PO8505 6,476,863 ART02
PO7988 6,788,336 ART03
PO9395 6,322,181 ART04
PO8017 6,597,817 ART06
PO8014 6,227,648 ART07
PO8025 6,727,948 ART08
PO8032 6,690,419 ART09
PO7999 6,727,951 ART10
PO8030 6,196,541 ART13
PO7997 6,195,150 ART15
PO7979 6,362,868 ART16
PO7978 6,831,681 ART18
PO7982 6,431,669 ART19
PO7989 6,362,869 ART20
PO8019 6,472,052 ART21
PO7980 6,356,715 ART22
PO7938 6,636,216 ART25
PO8016 6,366,693 ART26
PO8024 6,329,990 ART27
PO7939 6,459,495 ART29
PO8501 6,137,500 ART30
PO8500 6,690,416 ART31
PO8022 6,398,328 ART33
PO8020 6,431,704 ART38
PO8000 6,415,054 ART43
PO7934 6,665,454 ART45
PO7990 6,542,645 ART46
PO8499 6,486,886 ART47
PO8502 6,381,361 ART48
PO7981 6,317,192 ART50
PO7986 6850274 ART51
PO8026 6,646,757 ART53
PO8028 6,624,848 ART56
PO9394 6,357,135 ART57
PO9397 6,271,931 ART59
PO9398 6,353,772 ART60
PO9400 6,665,008 ART62
PO9401 6,304,291 ART63
PO9403 6,305,770 ART65
PO9405 6,289,262 ART66
PP0959 6,315,200 ART68
PP1397 6,217,165 ART69
PP2370 6,786,420 DOT01
PO8003 6,350,023 Fluid01
PO8005 6,318849 Fluid02
PO8066 6,227,652 IJ01
PO8072 6,213,588 IJ02
PO8040 6,213,589 IJ03
PO8071 6,231,163 IJ04
PO8047 6,247,795 IJ05
PO8035 6,394,581 IJ06
PO8044 6,244,691 IJ07
PO8063 6,257,704 IJ08
PO8057 6,416,168 IJ09
PO8056 6,220,694 IJ10
PO8069 6,257,705 IJ11
PO8049 6,247,794 IJ12
PO8036 6,234,610 IJ13
PO8048 6,247,793 IJ14
PO8070 6,264,306 IJ15
PO8067 6,241,342 IJ16
PO8001 6,247,792 IJ17
PO8038 6,264,307 IJ18
PO8033 6,254,220 IJ19
PO8002 6,234,611 IJ20
PO8068 6,302,528 IJ21
PO8062 6,283.582 IJ22
PO8034 6,239,821 IJ23
PO8039 6,338,547 IJ24
PO8041 6,247,796 IJ25
PO8004 6,557,977 IJ26
PO8037 6,390,603 IJ27
PO8043 6,362,843 IJ28
PO8042 6,293,653 IJ29
PO8064 6,312,107 IJ30
PO9389 6,227,653 IJ31
PO9391 6,234,609 IJ32
PP0888 6,238,040 IJ33
PP0891 6,188,415 IJ34
PP0890 6,227,654 IJ35
PP0873 6,209,989 IJ36
PP0993 6,247,791 IJ37
PP0890 6,336,710 IJ38
PP1398 6,217,153 IJ39
PP2592 6,416,167 IJ40
PP2593 6,243,113 IJ41
PP3991 6,283,581 IJ42
PP3987 6,247,790 IJ43
PP3985 6,260,953 IJ44
PP3983 6,267,469 IJ45
PO7935 6,224,780 IJM01
PO7936 6,235,212 IJM02
PO7937 6,280,643 IJM03
PO8061 6,284,147 IJM04
PO8054 6,214,244 IJM05
PO8055 6,267,905 IJM07
PO8053 6,251,298 IJM08
PO8078 6,258,285 IJM09
PO7933 6,225,138 IJM10
PO7950 6,241,904 IJM11
PO7949 6,299,786 IJM12
PO8059 6,231,773 IJM14
PO8073 6,190,931 IJM15
PO8076 6,248,249 IJM16
PO8075 6,290,862 IJM17
PO8079 6,241,906 IJM18
PO8050 6,565,762 IJM19
PO8052 6,241,905 IJM20
PO7948 6,451,216 IJM21
PO7951 6,231,772 IJM22
PO8074 6,274,056 IJM23
PO7941 6,290,861 IJM24
PO8077 6,248,248 IJM25
PO8058 6,306,671 IJM26
PO8051 6,331,258 IJM27
PO7952 6,294,101 IJM29
PO8046 6,416,679 IJM30
PO9390 6,264,849 IJM31
PO9392 6,254,793 IJM32
PP0889 6,235,211 IJM35
PP0887 6,491,833 IJM36
PP0882 6,264,850 IJM37
PP0874 6,258,284 IJM38
PP1396 6,312,615 IJM39
PP3989 6,228,668 IJM40
PP2591 6,180,427 IJM41
PP3990 6,171,875 IJM42
PP3986 6,267,904 IJM43
PP3984 6,245,247 IJM44
PP3982 6,315,914 IJM45
PP0895 6,231,148 IR01
PP0869 6,293,658 IR04
PP0887 6,614,560 IR05
PP0885 6,238,033 IR06
PP0884 6,312,070 IR10
PP0886 6,238,111 IR12
PP0877 6,378,970 IR16
PP0878 6,196,739 IR17
PP0883 6,270,182 IR19
PP0880 6,152,619 IR20
PO8007 6,340,222 MEMS03
PO8011 6,299,300 MEMS06
PO7944 6,286,935 MEMS09
PP0894 6,382,769 MEMS13
Many different techniques of ink jet printing have been invented. For a survey of the field, reference is made to an article by J Moore, “Non-Impact Printing: Introduction and Historical Perspective”, Output Hard Copy Devices, Editors R Dubeck and S Sherr, pages 207–220 (1988).
According to a first aspect of the present invention, there is provided an inkjet printhead chip that comprises
a substrate that defines a plurality of ink supply channels;
a drive circuitry layer that is positioned on the substrate; and
a plurality of nozzle arrangements that are positioned on the substrate, each nozzle arrangement including
a nozzle chamber defined by the substrate;
a roof structure positioned over the nozzle chamber, the roof structure defining an ink ejection port; and
at least one actuator that is positioned in the roof structure and is displaceable with respect to the substrate on receipt of an electrical current from the drive circuitry layer to reduce a volume of the nozzle chamber so that ink is ejected from the ink ejection port.
A number of actuators may be positioned in each roof structure about the ink ejection port.
Each actuator may include an actuator arm that is connected to the drive circuitry layer and extends towards the ink ejection port. A heating circuit may be embedded in the actuator arm to receive the electrical signal from the drive circuitry layer. The actuator arm may be of a material that has a coefficient of thermal expansion sufficient to permit the material to perform work as a result of thermal expansion and contraction. The heating circuit may be positioned so that the actuator arm is subjected to differential thermal expansion and contraction to displace the actuator arm towards and away from the respective ink supply channel.
Each actuator arm may be of polytetrafluoroethylene while each heating circuit may be one of the materials in a group including gold and copper.
Each actuator arm may include an actuating portion that is connected to the drive circuitry layer. An ink displacement member may be positioned on the actuating portion to extend towards the ink ejection port.
Each roof structure may include a rim that defines the ink ejection port, the rim being supported above the respective ink inlet channel with support arms that extend from the rim to the drive circuitry layer. The actuator arms may be interposed between consecutive support arms.
The drive circuitry layer may be a CMOS layer.
FIGS. 1–3 are schematic sectional views illustrating the operational principles of the preferred embodiment;
FIGS. 6–13 are side perspective views, partly in section, illustrating the manufacturing steps of the preferred embodiments;
Piezoelectric A piezoelectric crystal Low power Very large area Kyser et al U.S. Pat. No.
such as lead consumption required for actuator 3,946,398
Electrostrictive An electric field is Low power Low maximum Seiko Epson,
used to activate consumption strain (approx. Usui et all JP
magnesium niobate strength required is marginal (~10 μs)
(PMN). (approx. 3.5 V/μm) High voltage
can be generated drive transistors
without difficulty required
Does not require Full pagewidth
electrical poling print heads
used to induce a phase consumption integrate with
exhibit large strains of strength of around 3 V/μm
up to 1% associated can be readily
Electrostatic Conductive plates are Low power Difficult to IJ02, IJ04
plates separated by a consumption operate electrostatic
Electrostatic A strong electric field Low current High voltage 1989 Saito et al,
pull is applied to the ink, consumption required U.S. Pat. No. 4,799,068
electromagnetic permanent magnet, Many ink types Permanent
displacing ink and can be used magnetic material
magnetic magnetic field in a soft consumption fabrication IJ10, IJ12, IJ14,
core electromagnetic magnetic core or yoke Many ink types Materials not IJ15, IJ17
fabricated from a can be used usually present in a
Magnetostriction The actuator uses the Many ink types Force acts as a Fischenbeck,
giant magnetostrictive can be used twisting motion U.S. Pat. No. 4,032,929
such as Terfenol-D (an Easy extension materials such as
hence Ter-Fe-NOL). available Copper
stressed to approx. 8 MPa. electromigration
egress from the Easy extension properties
Thermoelastic An actuator which Low power Efficient aqueous IJ03, IJ09, IJ17,
bend relies upon differential consumption operation requires a IJ18, IJ19, IJ20,
thermoelastic high coefficient of be generated material (e.g. PTFE) IJ20, IJ21, IJ22,
actuator thermal expansion Three methods of Requires a PTFE IJ23, IJ24, IJ27,
(CTE) such as PTFE deposition are deposition process, IJ28, IJ29, IJ30,
fabricated from a PTFE is a with high
thermoelastic expansion (such as Very low power development (High
actuator PTFE) is doped with consumption CTE conductive
conducting substances Many ink types polymer)
alloy known as Nitinol — of hundreds of MPa) of cycles
the Linear Stepper Medium force is complex multiphase
Actuator (LSA). available drive circuitry
pushes ink actuator directly fields required limited to around 10 kHz. jet
supplies sufficient Satellite drops However, this IJ01, IJ02, IJ03,
be provided by the IJ33, IJ34, IJ35,
Electrostatic The drops to be Very simple print Requires very Silverbrook, EP
pull printed are selected by head fabrication can high electrostatic 0771 658 A2 and
Shutter The actuator moves a High speed (>50 kHz) Moving parts are IJ13, IJ17, IJ21
shutter to block ink operation can required
of the grill holes. High speed (>50 kHz) Stiction is
operation can possible
mechanism required. Small physical actuator IJ01, IJ02, IJ03,
stimulation) actuator selects which operating speed phase and amplitude IJ08, IJ13, IJ15,
drops are to be fired The actuators must be carefully IJ17, IJ18, IJ19,
Electrostatic An electric field is Low power Field strength Silverbrook, EP
used to accelerate Simple print head required for 0771 658 A2 and
stack actuators are stacked. Reduced drive fabrication piezoelectric ink jets
Buckle plate A buckle plate can be Very fast Must stay within S. Hirata et al,
low travel actuator involved February 1996,
into a high travel, Generally high pp 418–423.
impeller vanes, which nozzle requirements
chip surface parallel to the print planar fabrication complexity IJ33,, IJ34, IJ35,
Radial constriction The actuator squeezes Relatively easy High force 1970 Zoltan U.S. Pat. No.
an ink reservoir, to fabricate single required 3,683,212
structures processes
Coil/uncoil A coiled actuator Easy to fabricate Difficult to IJ17, IJ21, IJ34,
tightly. The motion of process planar devices
pulls the shutter, and so has a high out-of- which directly push
inwards inwards to reduce the to the region behind complexity
actuator is energized, simplicity small compared to IJ01–IJ07, IJ10–IJ14,
it typically returns actuator force IJ16, IJ20,
rapidly to its normal Long refill time IJ22–IJ45
as surface tension and required IJ01–IJ07, IJ10–IJ14,
ink pressure both IJ16, IJ20, IJ22–IJ45
This reduces the flooding of the following: IJ01–IJ07,
pressure in the nozzle ejection surface of IJ09–IJ12,
required to eject a IJ22, , IJ23–IJ34,
certain volume of ink. IJ36–IJ41, IJ44
between the ink inlet advantage of ink rate IJ27, IJ29, IJ30
than that of the nozzle, area
resulting in easier ink Only partially
behind the flow by arranging the eliminated the negative IJ11, IJ14, IJ16,
the inlet and the IJ33, IJ34, IJ35,
Normal All of the nozzles are No added May not be Most ink jet
head to a cleaning IJ39, IJ40,, IJ41,
station. IJ42, IJ43, IJ44,,
pulses this may cause heat Can be readily the configuration of IJ06, IJ07, IJ09,
build-up at the nozzle controlled and the ink jet nozzle IJ10, IJ11, IJ14,
vibrations to dislodge IJ33, IJ34, IJ36,
Print head A flexible ‘blade’ is Effective for Difficult to use if Many ink jet
elastomer. out in high volume
Electroformed A nozzle plate is Fabrication High Hewlett Packard
nickel separately fabricated simplicity temperatures and Thermal Ink jet
from electroformed pressures are
such as polyimide or is possible Slow where there 76–83
micromachined plate is attainable construction Transactions on
micromachined from High cost Electron Devices,
and bonded to the precision alignment 1978, pp 1185–1195
micromachined using standard VLSI Monolithic under the nozzle related patent
using VLSI deposition techniques. Low cost plate to form the applications
lithographic Nozzles are etched in Existing nozzle chamber IJ01, IJ02, IJ04,
processes the nozzle plate using processes can be Surface may be IJ11, IJ12, IJ17,
VLSI lithography and used fragile to the touch IJ18, IJ20, IJ22,
etching. IJ24, IJ27, IJ28,
plate been tried to eliminate become clogged control drop Sekiya et al U.S. Pat. No.
Nozzle slit The elimination of No nozzles to Difficult to 1989 Saito et al
actuator positions problems
packing density IJ24, IJ27–IJ45
the same substrate as connections to drive ink jets
change room temperature, and ink instantly freezes Printed ink melt piezoelectric
Microemulsion A microemulsion is a Stops ink bleed Viscosity higher All IJ series ink
stable, self forming High dye than water jets
1. An inkjet printhead integrated circuit that comprises
a drive circuitry layer that is positioned in the substrate; and
a nozzle chamber structure arranged on the substrate and defining walls of a nozzle chamber in fluid communication with a respective ink supply channel; and
a deformable roof structure arranged on the nozzle chamber structure and being at least partially defined by a plurality of discrete actuators, each actuator being configured to be heated on receipt of an electrical signal from the drive circuitry so as to experience differential thermal expansion and contraction, reciprocally to reduce and enlarge a volume of the nozzle chamber, the roof structure defining an ink ejection port such that, upon such reduction and enlargement, a drop of ink is ejected from the ink ejection port.
2. An inkjet printhead integrated circuit as claimed in claim 1, in which the walls of each nozzle chamber are the product of an etching process carried out on the substrate so that each nozzle chamber is positioned in the substrate.
3. An inkjet printhead integrated circuit as claimed in claim 2, in which each actuator extends towards the ink ejection port, a heating circuit being embedded in the actuator to receive the electrical signal from the drive circuitry layer, the heating circuit being positioned so that the actuator is subjected to the differential thermal expansion and contraction to displace the actuator towards and away from the respective ink supply channel.
4. An inkjet printhead integrated circuit as claimed in claim 3, in which each ink ejection port is positioned centrally in the roof structure and the actuators radially with respect to the ink ejection port.
5. An inkjet printhead integrated circuit as claimed in claim 4, in which each roof structure includes a rim that defines the ink ejection port, the rim being supported above the respective ink inlet channel with support arms that extend from the rim to the drive circuitry layer, the actuators being interposed between consecutive support arms.
6. An inkjet printhead integrated circuit as claimed in claim 5, in which the support arms and the actuators are configured so that ink in the nozzle chamber forms a meniscus between each support arm and each adjacent actuator to permit displacement of the actuators while inhibiting egress of ink from between the support arms and the actuators.
7. An inkjet printhead integrated circuit as claimed in claim 3, in which each actuator includes an actuating portion that is connected to the drive circuitry layer and an ink displacement member that is positioned on the actuating portion to extend towards the ink ejection port.
8. An inkj et printhead integrated circuit as claimed in claim 3, in which each actuator is of polytetrafluoroethylene while each heating circuit is one of the materials in a group including gold and copper.
US11202331 1998-06-08 2005-08-12 Ink jet printhead chip with volumetric ink ejection mechanisms Expired - Fee Related US7182436B2 (en)
AUPP3987 1998-06-08
AUPP398798 1998-06-09
US09112806 US6247790B1 (en) 1998-06-09 1998-07-10 Inverted radial back-curling thermoelastic ink jet printing mechanism
US09855093 US6505912B2 (en) 1998-06-08 2001-05-14 Ink jet nozzle arrangement
US10303291 US6672708B2 (en) 1998-06-08 2002-11-23 Ink jet nozzle having an actuator mechanism located about an ejection port
US10728796 US6966633B2 (en) 1998-06-09 2003-12-08 Ink jet printhead chip having an actuator mechanisms located about ejection ports
US11202331 US7182436B2 (en) 1998-06-09 2005-08-12 Ink jet printhead chip with volumetric ink ejection mechanisms
US11525861 US7637594B2 (en) 1998-06-09 2006-09-25 Ink jet nozzle arrangement with a segmented actuator nozzle chamber cover
US12627675 US7942507B2 (en) 1998-06-09 2009-11-30 Ink jet nozzle arrangement with a segmented actuator nozzle chamber cover
US10728796 Continuation US6966633B2 (en) 1998-06-08 2003-12-08 Ink jet printhead chip having an actuator mechanisms located about ejection ports
US11525861 Continuation US7637594B2 (en) 1998-06-08 2006-09-25 Ink jet nozzle arrangement with a segmented actuator nozzle chamber cover
US20050270336A1 true US20050270336A1 (en) 2005-12-08
US7182436B2 true US7182436B2 (en) 2007-02-27
ID=3808232
US09112806 Active US6247790B1 (en) 1998-06-09 1998-07-10 Inverted radial back-curling thermoelastic ink jet printing mechanism
US09855093 Active US6505912B2 (en) 1998-06-08 2001-05-14 Ink jet nozzle arrangement
US09854714 Expired - Fee Related US6712986B2 (en) 1998-06-09 2001-05-14 Ink jet fabrication method
US09854715 Expired - Fee Related US6488358B2 (en) 1998-06-08 2001-05-14 Ink jet with multiple actuators per nozzle
US09854703 Expired - Fee Related US6981757B2 (en) 1998-06-09 2001-05-14 Symmetric ink jet apparatus
US09854830 Expired - Fee Related US7021746B2 (en) 1998-06-09 2001-05-15 Ink jet curl outwards mechanism
US10291561 Expired - Fee Related US6998062B2 (en) 1998-06-08 2002-11-12 Method of fabricating an ink jet nozzle arrangement
US10303291 Expired - Fee Related US6672708B2 (en) 1998-06-08 2002-11-23 Ink jet nozzle having an actuator mechanism located about an ejection port
US10303349 Expired - Fee Related US6899415B2 (en) 1998-06-08 2002-11-23 Ink jet nozzle having an actuator mechanism comprised of multiple actuators
US10309036 Expired - Fee Related US7284833B2 (en) 1998-06-08 2002-12-04 Fluid ejection chip that incorporates wall-mounted actuators
US10728796 Expired - Fee Related US6966633B2 (en) 1998-06-08 2003-12-08 Ink jet printhead chip having an actuator mechanisms located about ejection ports
US10728921 Expired - Fee Related US6969153B2 (en) 1998-06-08 2003-12-08 Micro-electromechanical fluid ejection device having actuator mechanisms located about ejection ports
US10728886 Expired - Fee Related US6979075B2 (en) 1998-06-08 2003-12-08 Micro-electromechanical fluid ejection device having nozzle chambers with diverging walls
US10728924 Expired - Fee Related US7179395B2 (en) 1998-06-08 2003-12-08 Method of fabricating an ink jet printhead chip having actuator mechanisms located about ejection ports
US10808582 Expired - Fee Related US6886918B2 (en) 1998-06-09 2004-03-25 Ink jet printhead with moveable ejection nozzles
US10882763 Active 2019-02-06 US7204582B2 (en) 1998-06-08 2004-07-02 Ink jet nozzle with multiple actuators for reducing chamber volume
US11000936 Active US7156494B2 (en) 1998-06-09 2004-12-02 Inkjet printhead chip with volume-reduction actuation
US11015018 Expired - Fee Related US7140720B2 (en) 1998-06-08 2004-12-20 Micro-electromechanical fluid ejection device having actuator mechanisms located in chamber roof structure
US11026136 Active US7188933B2 (en) 1997-07-15 2005-01-03 Printhead chip that incorporates nozzle chamber reduction mechanisms
US11055203 Expired - Fee Related US7086721B2 (en) 1998-06-09 2005-02-11 Moveable ejection nozzles in an inkjet printhead
US11055246 Expired - Fee Related US7093928B2 (en) 1998-06-09 2005-02-11 Printer with printhead having moveable ejection port
US11126205 Expired - Fee Related US7131717B2 (en) 1998-06-08 2005-05-11 Printhead integrated circuit having ink ejecting thermal actuators
US11202331 Expired - Fee Related US7182436B2 (en) 1998-06-08 2005-08-12 Ink jet printhead chip with volumetric ink ejection mechanisms
US11202342 Active 2018-10-26 US7104631B2 (en) 1998-06-08 2005-08-12 Printhead integrated circuit comprising inkjet nozzles having moveable roof actuators
US11225157 Expired - Fee Related US7399063B2 (en) 1998-06-09 2005-09-14 Micro-electromechanical fluid ejection device with through-wafer inlets and nozzle chambers
US11442126 Expired - Fee Related US7326357B2 (en) 1998-06-08 2006-05-30 Method of fabricating printhead IC to have displaceable inkjets
US11442161 Expired - Fee Related US7334877B2 (en) 1998-06-08 2006-05-30 Nozzle for ejecting ink
US11442160 Expired - Fee Related US7325904B2 (en) 1998-06-09 2006-05-30 Printhead having multiple thermal actuators for ink ejection
US11450445 Expired - Fee Related US7156498B2 (en) 1998-06-09 2006-06-12 Inkjet nozzle that incorporates volume-reduction actuation
US11525861 Expired - Fee Related US7637594B2 (en) 1998-06-08 2006-09-25 Ink jet nozzle arrangement with a segmented actuator nozzle chamber cover
US11583939 Expired - Fee Related US7413671B2 (en) 1998-06-08 2006-10-20 Method of fabricating a printhead integrated circuit with a nozzle chamber in a wafer substrate
US11583894 Expired - Fee Related US7284326B2 (en) 1998-06-08 2006-10-20 Method for manufacturing a micro-electromechanical nozzle arrangement on a substrate with an integrated drive circutry layer
US11635524 Expired - Fee Related US7381342B2 (en) 1998-06-09 2006-12-08 Method for manufacturing an inkjet nozzle that incorporates heater actuator arms
US11706379 Expired - Fee Related US7520593B2 (en) 1998-06-08 2007-02-15 Nozzle arrangement for an inkjet printhead chip that incorporates a nozzle chamber reduction mechanism
US11706366 Expired - Fee Related US7533967B2 (en) 1998-06-08 2007-02-15 Nozzle arrangement for an inkjet printer with multiple actuator devices
US11743662 Expired - Fee Related US7753490B2 (en) 1998-06-08 2007-05-02 Printhead with ejection orifice in flexible element
US11955358 Expired - Fee Related US7568790B2 (en) 1998-06-09 2007-12-12 Printhead integrated circuit with an ink ejecting surface
US11965722 Expired - Fee Related US7438391B2 (en) 1998-06-08 2007-12-27 Micro-electromechanical nozzle arrangement with non-wicking roof structure for an inkjet printhead
US12015441 Abandoned US20120019601A1 (en) 1998-06-08 2008-01-16 Micro-electromechanical nozzle arrangement with pyramidal ink chamber for an inkjet printhead
US12116923 Active 2019-09-26 US7922296B2 (en) 1998-06-09 2008-05-07 Method of operating a nozzle chamber having radially positioned actuators
US12170382 Expired - Fee Related US7857426B2 (en) 1998-06-08 2008-07-09 Micro-electromechanical nozzle arrangement with a roof structure for minimizing wicking
US12205911 Expired - Fee Related US7758161B2 (en) 1998-06-08 2008-09-07 Micro-electromechanical nozzle arrangement having cantilevered actuators
US12422936 Expired - Fee Related US7708386B2 (en) 1998-06-08 2009-04-13 Inkjet nozzle arrangement having interleaved heater elements
US12431723 Expired - Fee Related US7931353B2 (en) 1998-06-08 2009-04-28 Nozzle arrangement using unevenly heated thermal actuators
US12500604 Expired - Fee Related US7934809B2 (en) 1998-06-09 2009-07-10 Printhead integrated circuit with petal formation ink ejection actuator
US12627675 Expired - Fee Related US7942507B2 (en) 1998-06-08 2009-11-30 Ink jet nozzle arrangement with a segmented actuator nozzle chamber cover
US12772825 Expired - Fee Related US7997687B2 (en) 1998-06-08 2010-05-03 Printhead nozzle arrangement having interleaved heater elements
US12831251 Abandoned US20100271434A1 (en) 1998-06-08 2010-07-06 Printhead with movable ejection orifice
US12834898 Abandoned US20100277551A1 (en) 1998-06-08 2010-07-13 Micro-electromechanical nozzle arrangement having cantilevered actuator
Family Applications After (26)
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