EP2252427A1 - Double perçage au laser d'un film de fixation de circuit intégré de tête d impression - Google Patents

Double perçage au laser d'un film de fixation de circuit intégré de tête d impression

Info

Publication number
EP2252427A1
EP2252427A1 EP08714425A EP08714425A EP2252427A1 EP 2252427 A1 EP2252427 A1 EP 2252427A1 EP 08714425 A EP08714425 A EP 08714425A EP 08714425 A EP08714425 A EP 08714425A EP 2252427 A1 EP2252427 A1 EP 2252427A1
Authority
EP
European Patent Office
Prior art keywords
film
ink
ink supply
laser
cartridge
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP08714425A
Other languages
German (de)
English (en)
Inventor
Nagesh Ramachandra
Jennifer Mia Fishburn
Paul Timothy Sharp
Susan Williams
Paul Andrew Papworth
Simon Fielder
Kia Silverbrook
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Zamtec Ltd
Original Assignee
Silverbrook Research Pty Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Silverbrook Research Pty Ltd filed Critical Silverbrook Research Pty Ltd
Publication of EP2252427A1 publication Critical patent/EP2252427A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J29/00—Details of, or accessories for, typewriters or selective printing mechanisms not otherwise provided for
    • B41J29/02—Framework
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K26/00—Working by laser beam, e.g. welding, cutting or boring
    • B23K26/02—Positioning or observing the workpiece, e.g. with respect to the point of impact; Aligning, aiming or focusing the laser beam
    • B23K26/06—Shaping the laser beam, e.g. by masks or multi-focusing
    • B23K26/064—Shaping the laser beam, e.g. by masks or multi-focusing by means of optical elements, e.g. lenses, mirrors or prisms
    • B23K26/066—Shaping the laser beam, e.g. by masks or multi-focusing by means of optical elements, e.g. lenses, mirrors or prisms by using masks
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K26/00—Working by laser beam, e.g. welding, cutting or boring
    • B23K26/36—Removing material
    • B23K26/38—Removing material by boring or cutting
    • B23K26/382—Removing material by boring or cutting by boring
    • B23K26/389—Removing material by boring or cutting by boring of fluid openings, e.g. nozzles, jets
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J2/00—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed
    • B41J2/005—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by bringing liquid or particles selectively into contact with a printing material
    • B41J2/01—Ink jet
    • B41J2/17—Ink jet characterised by ink handling
    • B41J2/175—Ink supply systems ; Circuit parts therefor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J2/00—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed
    • B41J2/005—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by bringing liquid or particles selectively into contact with a printing material
    • B41J2/01—Ink jet
    • B41J2/17—Ink jet characterised by ink handling
    • B41J2/18—Ink recirculation systems
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K2103/00—Materials to be soldered, welded or cut
    • B23K2103/30—Organic material
    • B23K2103/42—Plastics
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K2103/00—Materials to be soldered, welded or cut
    • B23K2103/50—Inorganic material, e.g. metals, not provided for in B23K2103/02 – B23K2103/26

Definitions

  • the present invention relates to printers and in particular inkjet printers.
  • Pagewidth printheads increase print speeds as the printhead does not traverse back and forth across the page to deposit a line of an image.
  • the pagewidth printhead simply deposits the ink on the media as it moves past at high speeds.
  • Such printheads have made it possible to perform full colour 1600dpi printing at speeds in the vicinity of 60 pages per minute, speeds previously unattainable with conventional inkjet printers.
  • a further problem in the ink supply system is avoiding any particulates reaching nozzles, where they may potentially block or obscure the nozzles and affect print quality. It is therefore desirable that manufacturing processes for each component of the ink supply system eliminates as far as possible any particulate deposits, which may become entrained in ink flowing through the ink supply system.
  • the present invention provides a method of fabricating an apertured polymeric film, said method comprising the steps of:
  • said apertured polyme ⁇ c film is an adhesive polyme ⁇ c film for attachment of one or more p ⁇ nthead integrated circuits to an ink manifold, said one or more second apertures defining one or more ink supply holes.
  • said adhesive polymeric film comprises a central polymeric film sandwiched between adhesive layers.
  • said central polyme ⁇ c film is a polyimide film and said adhesive layers are epoxy layers.
  • said film is provided m a film package, said film package comprising said adhesive polymeric film and a pair of removeable protective lmers, each lmer protecting a respective adhesive layer.
  • said laser-ablatmg steps terminate m one of said protective lmers.
  • said laser-ablatmg steps drill through one of said protective lmers, said adhesive layers and said central polyme ⁇ c film.
  • the method further compnsmg the step of:
  • each first aperture has pe ⁇ meter dimensions about 5 to 30 microns less than predetermined perimeter dimensions of a corresponding second aperture.
  • each first aperture has pe ⁇ meter dimensions about 10 microns less than predetermined pe ⁇ meter dimensions of a co ⁇ espondmg second aperture.
  • each second aperture has a predetermined length dimension of up to about 500 microns and a predetermined width dimension of up to about 500 microns.
  • said first apertures are lined with carbonaceous deposits and said second apertures are substantially free of said carbonaceous soot deposits.
  • a film for attachment of one or more p ⁇ nthead integrated circuits to an ink supply manifold said film being obtained or obtainable by the method above.
  • RRE047-PCT the present invention provides a method of attaching one or more p ⁇ nthead integrated circuits onto an ink supply manifold, said method comprising the steps of:
  • step (i) bonding said one or more p ⁇ nthead integrated circuits to said film; wherein said film m step (i) is fabricated by the steps of:
  • said ink supply manifold is an LCP molding.
  • a plurality of said p ⁇ nthead integrated circuits are attached to said ink supply manifold such that they are butted end on end to provide a pagewidth p ⁇ nthead.
  • said ink supply holes are positioned to supply ink to ink supply channels defined m a backside of said one or more p ⁇ nthead integrated circuits.
  • said bonding steps are performed by thermal cu ⁇ ng and/or compression.
  • said ink supply holes are substantially free of carbonaceous soot deposits.
  • a p ⁇ nthead assembly comp ⁇ smg at least one p ⁇ nthead integrated circuit attached to an ink supply manifold, said p ⁇ nthead integrated circuit being attached with an adhesive film having a plurality of ink supply holes defined therein, wherein said pnnthead assembly is obtained or obtainable by the method above.
  • Figure 1 is a front and side perspective of a printer embodying the present invention
  • Figure 2 shows the printer of Figure 1 with the front face in the open position
  • Figure 3 shows the printer of Figure 2 with the printhead cartridge removed
  • Figure 4 shows the printer of Figure 3 with the outer housing removed;
  • Figure 5 shows the printer of Figure 3 with the outer housing removed and printhead cartridge installed
  • Figure 6 is a schematic representation of the printer's fluidic system
  • Figure 7 is a top and front perspective of the printhead cartridge
  • Figure 8 is a top and front perspective of the printhead cartridge in its protective cover
  • Figure 9 is a top and front perspective of the printhead cartridge removed from its protective cover
  • Figure 10 is a bottom and front perspective of the printhead cartridge
  • Figure 1 1 is a bottom and rear perspective of the printhead cartridge
  • Figures 12A-F shows the elevations of all sides of the printhead cartridge
  • Figure 13 is an exploded perspective of the printhead cartridge
  • Figure 14 is a transverse section through the ink inlet coupling of the printhead cartridge
  • Figure 15 is an exploded perspective of the ink inlet and filter assembly
  • Figure 16 is a section view of the cartridge valve engaged with the printer valve;
  • Figure 17 is a perspective of the LCP molding and flex PCB;
  • Figure 18 is an enlargement of inset A shown in Figure 17;
  • Figure 19 is an exploded bottom perspective of the LCP/flex PCB/printhead IC assembly
  • Figure 20 is an exploded top perspective of the LCP/flex PCB/printhead IC assembly
  • Figure 21 is an enlarged view of the underside of the LCP/flex PCB/printhead IC assembly
  • Figure 22 shows the enlargement of Figure 21 with the printhead ICs and the flex PCB removed;
  • Figure 23 shows the enlargement of Figure 22 with the printhead IC attach film removed
  • Figure 24 shows the enlargement of Figure 23 with the LCP channel molding removed
  • Figure 25 shows the printhead ICs with back channels and nozzles superimposed on the ink supply passages;
  • Figure 26 in an enlarged transverse perspective of the LCP/flex PCB/printhead IC assembly;
  • Figure 27 is a plan view of the LCP channel molding
  • Figures 28A and 28B are schematic section views of the LCP channel molding priming without a weir
  • Figures 29A, 29B and 29C are schematic section views of the LCP channel molding priming with a weir
  • Figure 30 in an enlarged transverse perspective of the LCP molding with the position of the contact force and the reaction force;
  • RRE047-PCT Figure 31 shows a reel of the IC attachment film
  • Figure 32 shows a section of the IC attach film between liners
  • Figure 33A-C are partial sections showing various stages of traditional laser-drilling of an attachment film; and Figures 34A-C are partial sections showing various stages of double laser-drilling of an attachment film, m accordance with the present invention.
  • Figure 1 shows a printer 2 embodying the present invention.
  • the mam body 4 of the printer supports a media feed tray 14 at the back and a pivoting face 6 at the front.
  • Figure 1 shows the pivoting face 6 closed such that the display screen 8 is its upright viewing position.
  • Control buttons 10 extend from the sides of the screen 8 for convenient operator input while viewing the screen.
  • To print a single sheet is drawn from the media stack 12 in the feed tray 14 and fed past the prmthead (concealed within the printer).
  • the printed sheet 16 is delivered through the printed media outlet slot 18.
  • Figure 2 shows the pivoting front face 6 open to reveal the interior of the printer 2. Opening the front face of the printer exposes the prmthead cartridge 96 installed within.
  • the prmthead cartridge 96 is secured m position by the cartridge engagement cams 20 that push it down to ensure that the ink coupling (described later) is fully engaged and the prmthead ICs (described later) are correctly positioned adjacent the paper feed path.
  • the cams 20 are manually actuated by the release lever 24.
  • the front face 6 will not close, and hence the printer will not operate, until the release lever 24 is pushed down to fully engage the cams. Closing the pivoting face 6 engages the printer contacts 22 with the cartridge contacts 104.
  • Figure 3 shows the printer 2 with the pivoting face 6 open and the p ⁇ nthead cartridge 96 removed.
  • the user pulls the cartridge release lever 24 up to disengage the cams 20.
  • This allows the handle 26 on the cartridge 96 to be gripped and pulled upwards.
  • the upstream and downstream ink couplings 112A and 112B disengage from the printer conduits 142. This is described m greater detail below.
  • To install a fresh cartridge the process is reversed. New cartridges are shipped and sold m an unp ⁇ med condition. So to ready the printer for printing, the active fluidics system (described below) uses a downstream pump to prime the cartridge and p ⁇ nthead with ink.
  • FIG 4 the outer casing of the printer 2 has been removed to reveal the internals.
  • a large ink tank 60 has separate reservoirs for all four different inks.
  • the ink tank 60 is itself a
  • RRE047-PCT replaceable cartridge that couples to the printer upstream of the shut off valve 66 (see Figure 6).
  • ink drawn out of the cartridge 96 by the pump 62 There is also a sump 92 for ink drawn out of the cartridge 96 by the pump 62.
  • the printer fluidics system is described m detail with reference to Figure 6. Briefly, ink from the tank 60 flows through the upstream ink lines 84 to the shut off valves 66 and on to the printer conduits 142. As shown m Figure 5, when the cartridge 96 is installed, the pump 62 (driven by motor 196) can draw ink into the LCP molding 64 (see Figures 6 and 17 to 20) so that the prmthead ICs 68 (again, see Figures 6 and 17 to 20) prime by capillary action. Excess ink drawn by the pump 62 is fed to a sump 92 housed with the ink tanks 60.
  • the total connector force between the cartridge contacts 104 and the printer contacts 22 is relatively high because of the number of contacts used. In the embodiment shown, the total contact force is 45 Newtons. This load is enough to flex and deform the cartridge.
  • FIG 30 the internal structure of the chassis molding 100 is shown.
  • the bearing surface 28 shown m Figure 3 is schematically shown m Figure 30.
  • the compressive load of the printer contacts on the cartridge contacts 104 is represented with arrows.
  • the reaction force at the bearing surface 28 is likewise represented with arrows.
  • the chassis molding 100 has a structural member 30 that extends in the plane of the connector force.
  • the chassis also has a contact rib 32 that bears against the bearing surface 28. This keeps the load on the structural member 30 completely compressive to maximize the stiffness of the cartridge and minimize any flex.
  • the print engine pipeline is a reference to the printer's processing of print data received from an external source and outputted to the prmthead for printing.
  • the print engine pipeline is described m detail m USSN 11/014769 (RRCOOlUS) filed December 20, 2004, the disclosure of which is incorporated herein by reference.
  • printers have relied on the structure and components withm the prmthead, cartridge and ink lines to avoid fluidic problems.
  • Some common fluidic problems are dep ⁇ med or dried nozzles, outgassmg bubble artifacts and color mixing from cross contamination.
  • Optimizing the design of the printer components to avoid these problems is a passive approach to fluidic control.
  • the only active component used to correct these were the nozzle actuators RRE047-PCT themselves.
  • this is often insufficient and or wastes a lot of ink m the attempt to correct the problem.
  • the problem is exacerbated m pagewidth p ⁇ ntheads because of the length and complexity of the ink conduits supplying the p ⁇ nthead ICs.
  • the Applicant has addressed this by developing an active fluidic system for the printer.
  • the fluidic architecture shown m Figure 6 is a single ink line for one color only.
  • a color printer would have separate lines (and of course separate ink tanks 60) for each ink color.
  • this architecture has a single pump 62 downstream of the LCP molding 64, and a shut off valve 66 upstream of the LCP molding.
  • the LCP molding supports the prmthead ICs 68 via the adhesive IC attach film 174 (see Figure 25).
  • the shut off valve 66 isolates the ink m the ink tank 60 from the p ⁇ nthead ICs 66 whenever the printer is powered down. This prevents any color mixing at the prmthead ICs 68 from reaching the ink tank 60 during periods of inactivity.
  • the ink tank 60 has a venting bubble point pressure regulator 72 for maintaining a relatively constant negative hydrostatic pressure m the ink at the nozzles.
  • Bubble point pressure regulators within ink reservoirs are comprehensively described m co-pending USSN 11/640355 (Our Docket RMC007US) incorporated herein by reference.
  • the regulator 72 is shown as a bubble outlet 74 submerged m the ink of the tank 60 and vented to atmosphere via sealed conduit 76 extending to an air mlet 78.
  • the pressure m the tank 60 drops until the pressure difference at the bubble outlet 74 sucks air into the tank.
  • This air forms a forms a bubble m the ink which ⁇ ses to the tank's headspace.
  • This pressure difference is the bubble point pressure and will depend on the diameter (or smallest dimension) of the bubble outlet 74 and the Laplace pressure of the ink meniscus at the outlet which is resisting the ingress of the air.
  • the bubble point regulator uses the bubble point pressure needed to generate a bubble at the submerged bubble outlet 74 to keep the hydrostatic pressure at the outlet substantially constant (there are slight fluctuations when the bulging meniscus of air forms a bubble and ⁇ ses to the headspace m the ink tank). If the hydrostatic pressure at the outlet is at the bubble point, then the hydrostatic pressure profile m the ink tank is also known regardless of how much ink has been RRE047-PCT consumed from the tank. The pressure at the surface of the ink in the tank will decrease towards the bubble point pressure as the ink level drops to the outlet. Of course, once the outlet 74 is exposed, the head space vents to atmosphere and negative pressure is lost. The ink tank should be refilled, or replaced (if it is a cartridge) before the ink level reaches the bubble outlet 74.
  • the ink tank 60 can be a fixed reservoir that can be refilled, a replaceable cartridge or (as disclosed in RRCOOlUS incorporated by reference) a refillable cartridge.
  • the outlet 80 of the ink tank 60 has a coarse filter 82.
  • the system also uses a fine filter at the coupling to the printhead cartridge. As filters have a finite life, replacing old filters by simply replacing the ink cartridge or the printhead cartridge is particularly convenient for the user. If the filters are separate consumable items, regular replacement relies on the user's diligence.
  • the hydrostatic pressure at the nozzles is also constant and less than atmospheric.
  • the shut off valve 66 has been closed for a period of time, outgassing bubbles may form in the LCP molding 64 or the printhead ICs 68 that change the pressure at the nozzles.
  • expansion and contraction of the bubbles from diurnal temperature variations can change the pressure in the ink line 84 downstream of the shut off valve 66.
  • the pressure in the ink tank can vary during periods of inactivity because of dissolved gases coming out of solution.
  • the downstream ink line 86 leading from the LCP 64 to the pump 62 can include an ink sensor 88 linked to an electronic controller 90 for the pump.
  • the sensor 88 senses the presence or absence of ink in the downstream ink line 86.
  • the system can dispense with the sensor 88, and the pump 62 can be configured so that it runs for an appropriate period of time for each of the various operations. This may adversely affect the operating costs because of increased ink wastage.
  • the pump 62 feeds into a sump 92 (when pumping in the forward direction).
  • the sump 92 is physically positioned in the printer so that it is less elevated than the printhead ICs 68. This allows the column of ink in the downstream ink line 86 to "hang' from the LCP 64 during standby periods, thereby creating a negative hydrostatic pressure at the printhead ICs 68. A negative pressure at the nozzles draws the ink meniscus inwards and inhibits color mixing.
  • the peristaltic pump 62 needs to be stopped in an open condition so that there is fluid communication between the LCP 64 and the ink outlet in the sump 92.
  • RRE047-PCT Pressure differences between the ink lines of different colors can occur during periods of inactivity. Furthermore, paper dust or other particulates on the nozzle plate can wick ink from one nozzle to another. Driven by the slight pressure differences between each ink line, color mixing can occur while the printer is inactive.
  • the shut off valve 66 isolates the ink tank 60 from the nozzle of the printhead ICs 68 to prevent color mixing extending up to the ink tank 60. Once the ink in the tank has been contaminated with a different color, it is irretrievable and has to be replaced.
  • the capper 94 is a printhead maintenance station that seals the nozzles during standby periods to avoid dehydration of the printhead ICs 68 as well as shield the nozzle plate from paper dust and other particulates.
  • the capper 94 is also configured to wipe the nozzle plate to remove dried ink and other contaminants. Dehydration of the printhead ICs 68 occurs when the ink solvent, typically water, evaporates and increases the viscosity of the ink. If the ink viscosity is too high, the ink ejection actuators fail to eject ink drops. Should the capper seal be compromised, dehydrated nozzles can be a problem when reactivating the printer after a power down or standby period.
  • the printhead cartridge 96 is shown in Figures 7 to 16A.
  • Figure 7 shows the cartridge 96 in its assembled and complete form.
  • the bulk of the cartridge is encased in the cartridge chassis 100 and the chassis lid 102.
  • a window in the chassis 100 exposes the cartridge contacts 104 that receive data from the print engine controller in the printer.
  • FIGs 8 and 9 show the cartridge 96 with its snap on protective cover 98.
  • the protective cover 98 prevents damaging contact with the electrical contacts 104 and the printhead ICs 68 (see Figure 10). The user can hold the top of the cartridge 96 and remove the protective cover 98 immediately prior to installation in the printer.
  • Figure 10 shows the underside and 'back' (with respect to the paper feed direction) of the printhead cartridge 96.
  • the printhead contacts 104 are conductive pads on a flexible printed RRE047-PCT circuit board 108 that wraps around a curved support surface (discussed below in the description relating to the LCP moulding) to a line of wire bonds 110 at one side if the printhead ICs 68.
  • a paper shield 106 On the other side of the printhead ICs 68 is a paper shield 106 to prevent direct contact with the media substrate.
  • FIG 11 shows the underside and the 'front' of the printhead cartridge 96.
  • the front of the cartridge has two ink couplings 112A and 112B at either end.
  • Each ink coupling has four cartridge valves 114.
  • the ink couplings 112A and 112B engage complementary ink supply interfaces (described in more detail below).
  • the ink supply interfaces have printer conduits 142 which engage and open the cartridge valves 114.
  • One of the ink couplings 112A is the upstream ink coupling and the other is the downstream coupling 112B.
  • the upstream coupling 112A establishes fluid communication between the printhead ICs 68 and the ink supply 60 (see Figure 6) and the downstream coupling 112B connects to the sump 92 (refer Figure 6 again).
  • the various elevations of the printhead cartridge 96 are shown in Figure 12.
  • the plan view of the cartridge 96 also shows the location of the section views shown in Figures 14, 15 and 16.
  • Figure 13 is an exploded perspective of the cartridge 96.
  • the LCP molding 64 attaches to the underside of the cartridge chassis 100.
  • the flex PCB 108 attaches to the underside of the cartridge chassis 100.
  • An inlet manifold and filter 116 and outlet manifold 118 attach to the top of the chassis 100.
  • the inlet manifold and filter 116 connects to the LCP inlets 122 via elastomeric connectors 120.
  • the LCP outlets 124 connect to the outlet manifold 118 via another set of elastomeric connectors 120.
  • the chassis lid 102 encases the inlet and outlet manifolds in the chassis 100 from the top and the removable protective cover 98 snaps over the bottom to protect the contacts 104 and the printhead ICs (see Figure 11).
  • Figure 14 is an enlarged section view taken along line 14-14 of Figure 12. It shows the fluid path through one of the cartridge valves 114 of the upstream coupling 112A to the LCP molding 64.
  • the cartridge valve 114 has an elastomeric sleeve 126 that is biased into sealing engagement with a fixed valve member 128.
  • the cartridge valve 114 is opened by the printer conduit 142 (see Figure 16) by compressing the elastomeric sleeve 126 such that it unseats from the fixed valve member 128 and allows ink to flow up to a roof channel 138 along the top of the inlet and filter manifold 116.
  • the roof channel 138 leads to an upstream filter chamber 132 that has one RRE047-PCT wall defined by a filter membrane 130. Ink passes through the filter membrane 130 into the downstream filter chamber 134 and out to the LCP mlet 122. From there filtered ink flows along the LCP mam channels 136 to feed into the prmthead ICs (not shown).
  • FIG. 15 The exploded perspective of Figure 15 best illustrates the compact design of the mlet and filter manifold 116.
  • the cartridge valves are spaced close together. This is achieved by departing from the traditional configuration of self-sealing ink valves.
  • Previous designs also used an elastome ⁇ c member biased into sealing engagement with a fixed member.
  • the elastome ⁇ c member was either a solid shape that the mk would flow around, or m the form of a diaphragm if the ink flowed through it.
  • a coupling m which one valve has an elastome ⁇ c member which is engaged by a rigid member on the other valve. If the elastome ⁇ c member is m a diaphragm form, it usually holds itself against the central ngid member under tension. This provides an effective seal and requires relatively low tolerances. However, it also requires the elastomer element to have a wide peripheral mounting. The width of the elastomer will be a trade-off between the desired coupling force, the integrity of the seal and the material properties of the elastomer used.
  • the cartridge valves 114 of the present invention use elastome ⁇ c sleeves 126 that seal against the fixed valve member 128 under residual compression.
  • the valve 114 opens when the cartridge is installed m the printer and the conduit end 148 of the printer valve 142 further compresses the sleeve 126.
  • the collar 146 unseals from the fixed valve member 128 to connect the LCP 64 into the p ⁇ nter fluidic system (see Figure 6) via the upstream and downstream ink coupling 112A and 112B.
  • the sidewall of the sleeve is configured to bulge outwardly as collapsing inwardly can create a flow obstruction.
  • the sleeve 126 has a line of relative weakness around its mid-section that promotes and directs the buckling process. This reduces the force necessary to engage the cartridge with the printer, and ensures that the sleeve buckles outwardly.
  • the coupling is configured for 'no-drip' disengagement of the cartridge from the printer.
  • the elastome ⁇ c sleeve 126 pushes the collar 146 to seal against the fixed member 128. Once the sleeve 126 has sealed against the valve member 128 (thereby sealing the cartridge side of the coupling), the sealing collar 146 lifts together
  • the air in conduit 150 When a fresh cartridge is installed in the printer, the air in conduit 150 will be entrained into the ink flow 152 and ingested by the cartridge. In light of this, the inlet manifold and filter assembly have a high bubble tolerance. Referring back to Figure 15, the ink flows through the top of the fixed valve member 128 and into the roof channel 138. Being the most elevated point of the inlet manifold 116, the roof channels can trap the bubbles. However, bubbles may still flow into the filter inlets 158. In this case, the filter assembly itself is bubble tolerant.
  • Bubbles on the upstream side of the filter member 130 can affect the flow rate - they effectively reduce the wetted surface area on the dirty side of the filter membrane 130.
  • the filter membranes have a long rectangular shape so even if an appreciable number of bubbles are drawn into the dirty side of the filter, the wetted surface area remains large enough to filter ink at the required flow rate. This is crucial for the high speed operation offered by the present invention.
  • bubbles from outgassing may generate bubbles in the downstream filter chamber 134.
  • the filter outlet 156 is positioned at the bottom of the downstream filter chamber 134 and diagonally opposite the inlet 158 in the upstream chamber 132 to minimize the effects of bubbles in either chamber on the flow rate.
  • the filters 130 for each color are vertically stacked closely side-by-side.
  • the partition wall 162 partially defines the upstream filter chamber 132 on one side, and partially defines the downstream chamber 134 of the adjacent color on the other side.
  • the filter membrane 130 can be pushed against the opposing wall of the downstream filter chamber 134. This effectively reduces the surface are of the filter membrane 130. Hence it is detrimental to maximum flowrate. To prevent this, the opposing wall of the
  • RRE047-PCT downstream chamber 134 has a series of spacer ribs 160 to keep the membrane 130 separated from the wall.
  • Positioning the filter mlet and outlet at diagonally opposed corners also helps to purge the system of air during the initial p ⁇ me of the system.
  • the filter membrane 130 is welded to the downstream side of a first partition wall before the next partition wall 162 is welded to the first partition wall. In this way, any small pieces of filter membrane 130 that break off during the welding process, will be on the 'dirty' side of the filter 130.
  • FIG. 17 is a perspective of the underside of the LCP molding 64 with the flex PCB and prmthead ICs 68 attached.
  • the LCP molding 64 is secured to the cartridge chassis 100 through coutersunk holes 166 and 168. Hole 168 is an obround hole to accommodate any miss match m coefficients of thermal expansion (CTE) without bending the LCP.
  • the p ⁇ nthead ICs 68 are arranged end to end m a line down the longitudinal extent of the LCP molding 64.
  • the flex PCB 108 is wire bonded at one edge to the prmthead ICs 68.
  • the flex PCB 108 also secures to the LCP molding at the p ⁇ nthead IC edge as well as at the cartridge contacts 104 edge. Secu ⁇ ng the flex
  • Figure 18 is an enlarged view of Inset A shown m Figure 17. It shows the line of wire bonding contacts 164 along the side if the flex PCB 108 and the line of p ⁇ nthead ICs 68.
  • FIG 19 is an exploded perspective of the LCP/flex/p ⁇ nthead IC assembly showing the underside of each component.
  • Figure 20 is another exploded perspective, this time showing the topside of the components.
  • the LCP molding 64 has an LCP channel molding 176 sealed to its underside.
  • the pnnthead ICs 68 are attached to the underside of the channel molding 176 by adhesive IC attach film 174.
  • On the topside of the LCP channel molding 176 are the LCP mam channels 184. These are open to the ink mlet 122 and mk outlet 124 m the LCP molding 64.
  • At the bottom of the LCP mam channels 184 are a senes of ink supply passages 182 leading to the pnnthead ICs 68.
  • the adhesive IC attach film 174 has a series of laser drilled supply holes 186 so that the attachment side of each prmthead IC 68 is m fluid communication with the ink supply
  • the LCP molding 64 has recesses 178 to accommodate electronic components 180 in the drive circuitry on the flex PCB 108.
  • the cartridge contacts 104 on the PCB 108 should be close to the printhead ICs 68.
  • the cartridge contacts 104 need to be on the side of the cartridge 96.
  • the conductive paths in the flex PCB are known as traces. As the flex PCB must bend around a corner, the traces can crack and break the connection. To combat this, the trace can be bifurcated prior to the bend and then reunited after the bend. If one branch of the bifurcated section cracks, the other branch maintains the connection. Unfortunately, splitting the trace into two and then joining it together again can give rise to electro-magnetic interference problems that create noise in the circuitry.
  • Pagewidth printheads present additional complications because of the large array of nozzles that must fire in a relatively short time. Firing many nozzles at once places a large current load on the system. This can generate high levels of inductance through the circuits which can cause voltage dips that are detrimental to operation. To avoid this, the flex PCB has a series of capacitors that discharge during a nozzle firing sequence to relieve the current load on the rest of the circuitry. Because of the need to keep a straight paper path past the printhead ICs, the capacitors are traditionally attached to the flex PCB near the contacts on the side of the cartridge. Unfortunately, they create additional traces that risk cracking in the bent section of the flex PCB.
  • the contacts can be larger as there are no traces from the components running in between and around the contacts. With larger contacts, the connection is more reliable and better able to cope with fabrication inaccuracies between the cartridge contacts and the printer-side contacts. This is particularly important in this case, as the mating contacts rely on users to accurately insert the cartridge.
  • the edge of the flex PCB that wire bonds to the side of the printhead IC is not under residual stress and trying to peel away from the bend radius.
  • the flex can be fixed to the support structure at the capacitors and other components so that the wire bonding to the printhead IC is easier to form during fabrication and less prone to cracking as it is not also being used to anchor the flex.
  • the capacitors are much closer to the nozzles of the printhead IC and so the electro-magnetic interference generated by the discharging capacitors is minimized.
  • Figure 21 is an enlargement of the underside of the printhead cartridge 96 showing the flex PCB 108 and the printhead ICs 68.
  • the wire bonding contacts 164 of the flex PCB 108 run parallel to the contact pads of the printhead ICs 68 on the underside of the adhesive IC attach film 174.
  • Figure 22 shows Figure 21 with the printhead ICs 68 and the flex PCB removed to reveal the supply holes 186.
  • the holes are arranged in four longitudinal rows. Each row delivers ink of one particular color and each row aligns with a single channel in the back of each printhead IC.
  • Figure 23 shows the underside of the LCP channel molding 176 with the adhesive IC attach film 174 removed. This exposes the ink supply passages 182 that connect to the LCP main channels 184 (see Figure 20) formed in the other side of the channel molding 176. It will be appreciated that the adhesive IC attach film 174 partly defines the supply passages 182 when it is stuck in place. It will also be appreciated that the attach film must be accurately positioned, as the individual supply passages 182 must align with the supply holes 186 laser drilled through the film 174.
  • Figure 24 shows the underside of the LCP molding with the LCP channel molding removed. This exposes the array of blind cavities 200 that contain air when the cartridge is primed with ink in order to damp any pressure pulses. This is discussed in greater detail below.
  • the film 174 may be laser drilled and wound onto a reel 198 for convenient incorporation in the printhead cartridge 96.
  • the film 174 has two protective liners (typically PET liners) on either side.
  • One is an existing liner 188B that is already attached to the film prior to laser drilling.
  • the other is a replacement liner 192, which replaces an existing liner 188A, after the drilling operation.
  • the section of the laser-drilled film 174 shown in Figure 32 has some of the existing liner
  • the replacement liner 192 on the other side of the film replaces an existing liner 188A after the supply holes 186 have been laser drilled.
  • Figures 33A to 33C show in detail how the film 174 is manufactured by laser ablation.
  • Figure 33 A shows in detail the laminate structure of the film prior to laser-drilling.
  • the central web 190 is typically a polyimide film and provides the strength for the laminate.
  • the web 190 is sandwiched between adhesive layers 194A and 194B, which are typically epoxy layers.
  • Each adhesive layer 194A and 194 B is covered with a respective liner 188A and 188B.
  • the central web 190 typically has a thickness of from 20 to 100 microns (usually about 50 microns).
  • Each adhesive layer 194A and 194B typically has a thickness of from 10 to 50 microns (usually about 25 microns).
  • liner 188A laser-drilling is performed from the side of the film defined by the liner 188A.
  • a hole 186 is drilled through the first liner 188A, the epoxy layers 194A and 194B and the central web 190.
  • the hole 186 terminates somewhere in the liner 188B, and so the liner 188B may be thicker than the liner 188A (e.g. liner 188A may be 10-20 microns thick; liner 188B may be 30-100 microns thick).
  • the foraminous liner 188A on the laser-entry side is then removed and replaced with a replacement liner 192, to provide the film 174 shown in Figure 33C.
  • the strip of film 174 is then wound into a reel 198 (see Figure 31) for storage and handling prior to attachment.
  • suitable lengths are drawn from the reel 198, the liners removed and adhered to the underside of the LCP channel molding 176 such that the holes 186 are in registration with the correct ink supply passages 182 (see Figure 25).
  • Laser drilling is a standard method for defining holes in polymer films.
  • a problem with laser drilling is that it deposits a carbonaceous soot 197 in and around the drilling site RRE047-PCT (see Figures 33B and 33C). Soot around a protective lmer may be easily dealt with, because this is usually replaced after laser drilling. However, soot 197 deposited m and around the actual supply holes 186 is potentially problematic. When the film is compressed between the LCP channel molding 176 and p ⁇ nthead ICs 68 during bonding, the soot may be dislodged.
  • Any dislodged soot 197 represents a means by which particulates may enter the ink supply system and potentially block nozzles m the prmthead ICs 68. Moreover, the soot is surprisingly fast and cannot be removed by conventional ultrasonication and/or IPA washing techniques.
  • soot 197 is generally present on the laser-entry side of the film 174 (i.e. the epoxy layer
  • Double-Pass Laser Ablated Film It would be desirable to provide a method of manufacturing an IC attachment film 174 which does not suffer from above-mentioned problems associated with carbonaceous soot deposits 197.
  • double-pass laser ablation of the mk supply holes 186 eliminates the majority of soot deposits 197, including those on the laser-entry side of the film.
  • the starting point for double-pass laser ablation is the film shown in Figure 33 A.
  • Laser-drilling typically employs an excimer laser having a pulse frequency in the range of 200Hz to 400Hz.
  • the spot size of the laser is usually relatively large compared to the size of the mk supply holes, meaning that several ink holes are ablated at the same time. Since the laser spot size is relatively large, each laser-drilling step is performed by masking the film using a mask having a plurality of laser transmission (or laser-transparent) zones defined therein.
  • a first hole 185 is laser-drilled from the side of the film defined by the lmer
  • the hole 185 is drilled through the lmer 188A, the epoxy layers 194A and 194B, and the central web 190.
  • the hole 185 terminates somewhere m the lmer 188B.
  • the first laser-drilled hole 185 defined using a first mask, has smaller dimensions than the intended mk supply hole 186. Typically each length and width dimension of the first hole 185 is about 10 microns smaller than the length and width dimensions of the intended ink supply hole 186. It will be seen from Figure 34A that the first hole 185 has soot 197 deposited on the first lmer 188A, the first epoxy layer 194A and the central web 190.
  • the first hole 185 is reamed by further laser drilling, using a second mask, so as to provide the ink supply hole 186 having the desired dimensions.
  • the reaming process generates very little soot and the resulting ink supply hole 186 therefore has clean sidewalls as shown m Figure 34B.
  • the first lmer 188A is replaced with a replacement lmer 192 to provide a film package, which is ready to be wound onto a reel and used subsequently for attaching p ⁇ nthead ICs 68 to the LCP channel molding 176.
  • the second lmer 188B may also be replaced at this stage, if desired.
  • the double laser ablation method provides a film 174 having much cleaner ink supply holes 186 than simple laser ablation.
  • the film is highly suitable for attachment of p ⁇ nthhead ICs 68 to the LCP channel molding 176, and does not contaminate ink with undesirable soot deposits.
  • Figure 25 shows the p ⁇ nthead ICs 68, superimposed on the ink supply holes 186 through the adhesive IC attach film 174, which are m turn superimposed on the ink supply passages 182 m the underside of the LCP channel molding 176.
  • Adjacent p ⁇ nthead ICs 68 are positioned end to end on the bottom of the LCP channel molding 176 via the attach film 174.
  • one of the ICs 68 has a 'drop triangle' 206 portion of nozzles m rows that are laterally displaced from the corresponding row m the rest of the nozzle array 220.
  • the nozzles at the ends of a pnnthead IC 68 can be starved of ink relative to the bulk of the nozzles m the rest of the array 220.
  • the nozzles 222 can be supplied with ink from two ink supply holes. Ink supply hole 224 is the closest. However, if there is an obstruction or particularly heavy demand from nozzles to the left of the hole 224, the supply hole 226 is also proximate to the nozzles at 222, so there is little chance of these nozzles depnmmg from ink starvation.
  • the nozzles 214 at the end of the p ⁇ nthead IC 68 would only be m fluid communication with the mk supply hole 216 were it not for the ' additional ' ink supply hole 210 placed at the junction between the adjacent ICs 68. Having the additional ink supply hole 210 means that none of the nozzles are so remote from an mk supply hole that they risk mk starvation.
  • Ink supply holes 208 and 210 are both fed from a common mk supply passage 212.
  • the mk supply passage 212 has the capacity to supply both holes as supply hole 208 only has nozzles to its left, and supply hole 210 only has nozzles to its right. Therefore, the total flowrate through supply passage 212 is roughly equivalent to a supply passage that feeds one hole only.
  • Figure 25 also highlights the discrepancy between the number of channels (colors) m the mk supply- four channels - and the five channels 218 m the p ⁇ nthead IC 68.
  • the third and fourth channels 218 m the back of the pnnthead IC 68 are fed from the same ink supply holes 186. These supply holes are somewhat enlarged to span two channels 218.
  • the pnnthead IC 68 is fabricated for use m a wide range of printers and p ⁇ nthead configurations. These may have five color channels - CMYK and IR (infrared) - but other printers, such this design, may only be four channel pnnters, and others still may only be three channel (CC, MM and Y). In light of this, a single color channel may be fed to two of the p ⁇ nthead IC channels.
  • the p ⁇ nt engine controller (PEC) microprocessor can easily accommodate this into the p ⁇ nt data sent to the p ⁇ nthead IC. Furthermore, supplying the same color to two nozzle rows m the IC provides a degree of nozzle redundancy that can used for dead nozzle compensation.
  • Sharp spikes m the mk pressure occur when the mk flowing to the pnnthead is stopped suddenly. This can happen at the end of a pnnt job or a page.
  • the Assignee' s high speed, pagewidth pnntheads need a high flow rate of supply ink during operation. Therefore, the mass of mk m the mk line to the nozzles is relatively large and moving at an appreciable rate.
  • Resonant pulses m the ink occur when the nozzle firing rate matches a resonant frequency of the ink line.
  • a large proportion of nozzles for one color, firing simultaneously can create a standing wave or resonant pulse m the ink line. This can result m nozzle flooding, or conversely nozzle dep ⁇ me because of the sudden pressure drop after the spike, if the Laplace pressure is exceeded.
  • the LCP molding 64 incorporates a pulse damper to remove pressure spikes from the ink line.
  • the damper may be an enclosed volume of gas that can be compressed by the mk.
  • the damper may be a compliant section of the mk line that can elastically flex and absorb pressure pulses.
  • the invention uses compressible volumes of gas to damp pressure pulses. Damping pressure pulses using gas compression can be achieved with small of gas. This preserves a compact design while avoiding any nozzle flooding from transient spikes m the ink pressure.
  • the pulse damper is not a single volume of gas for compression by pulses m the ink. Rather the damper is an array of cavities 200 distributed along the length of the LCP molding 64.
  • a pressure pulse moving through an elongate printhead, such as a pagewidth printhead, can be damped at any point m the ink flow line.
  • the pulse will cause nozzle flooding as it passes the nozzles m the printhead integrated circuit, regardless of whether it is subsequently dissipated at the damper.
  • any pressure spikes are damped at the site where they would otherwise cause detrimental flooding.
  • Each row of cavities sits directly above the LCP mam channels 184 m the LCP channel molding 176. Any pressure pulses in the mk m the mam channels 184 act directly on the air m the cavities 200 and quickly dissipate.
  • the LCP channel molding 176 is primed with ink by suction applied to the main channel outlets 232 from the pump of the fluidic system (see Figure 6).
  • the main channels 184 are filled with ink and then the ink supply passages 182 and printhead ICs 68 self prime by capillary action.
  • the main channels 184 are relatively long and thin. Furthermore the air cavities 200 must remain unprimed if they are to damp pressure pulses in the ink. This can be problematic for the priming process which can easily fill cavities 200 by capillary action or the main channel 184 can fail to fully prime because of trapped air. To ensure that the LCP channel molding 176 fully primes, the main channels 184 have a weir 228 at the downstream end prior to the outlet 232. To ensure that the air cavities 200 in the LCP molding 64 do not prime, they have openings with upstream edges shaped to direct the ink meniscus from traveling up the wall of the cavity.
  • Figures 28A, 28B and 29A to 29C These aspects of the cartridge are best described with reference Figures 28A, 28B and 29A to 29C. These figures schematically illustrate the priming process. Figures 28A and 28B show the problems that can occur if there is no weir in the main channels, whereas Figures 29A to 29C show the function of the weir 228.
  • Figures 28A and 28B are schematic section views through one of the main channels 184 of the LCP channel molding 176 and the line of air cavities 200 in the roof of the channel.
  • Ink 238 is drawn through the inlet 230 and flows along the floor of the main channel 184. It is important to note that the advancing meniscus has a steeper contact angle with the floor of the channel 184. This gives the leading portion of the ink flow 238 a slightly bulbous shape.
  • the ink rises and the bulbous front contacts the top of the channel before the rest of the ink flow.
  • the channel 184 has failed to fully prime, and the air is now trapped. This air pocket will remain and interfere with the operation of the printhead.
  • the ink damping characteristics are altered and the air can be an ink obstruction.
  • the channel 184 has a weir 228 at the downstream end. As shown in FIG. 29A to 29C, the channel 184 has a weir 228 at the downstream end. As shown in FIG. 29A to 29C, the channel 184 has a weir 228 at the downstream end. As shown in FIG. 29A to 29C, the channel 184 has a weir 228 at the downstream end. As shown in FIG. 29A to 29C, the channel 184 has a weir 228 at the downstream end. As shown in
  • the ink flow 238 pools behind the weir 228 and rises toward the top of the channel.
  • the weir 228 has a sharp edge 240 at the top to act as a meniscus anchor point. The advancing meniscus pins to this anchor 240 so that the ink does not simply flow over the weir 228 as soon as the ink level is above the top edge.
  • the bulging meniscus makes the ink rise until it has filled the channel 184 to the top.
  • the bulging RRE047-PCT ink meniscus at the weir 228 breaks from the sharp top edge 240 and fills the end of the channel
  • the sharp to edge 240 is precisely positioned so that the ink meniscus will bulge until the ink fills to the top of the channel 184, but does not allow the ink to bulge so much that it contacts part of the end air cavity 242. If the meniscus touches and pms to the interior of the end air cavity 242, it may prime with ink. Accordingly, the height of the weir and its position under the cavity is closely controlled. The curved downstream surface of the weir 228 ensures that there are no further anchor points that might allow the ink meniscus to bridge the gap to the cavity 242.
  • a sharp downstream edge 236 will promote dep ⁇ mmg if the cavity 200 has inadvertently filled with some mk. If the printer is bumped, jarred or tilted, or if the fluidic system has had to reverse flow for any reason, the cavities 200 may fully of partially prime. When the ink flows m its normal direction again, a sharp downstream edge 236 helps to draw the meniscus back to the natural anchor point (i.e. the sharp corner). In this way, management of the ink meniscus movement through the LCP channel molding 176 is a mechanism for correctly priming the cartridge.

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  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Engineering & Computer Science (AREA)
  • Plasma & Fusion (AREA)
  • Mechanical Engineering (AREA)
  • Ink Jet (AREA)
  • Particle Formation And Scattering Control In Inkjet Printers (AREA)

Abstract

Procédé de fabrication d’un film polymérique à ouvertures. Le procédé comprend les étapes consistant à : (a) masquer un film polymérique avec un premier masque qui possède des premières zones de transmission laser définies à l’intérieur; (b) découper au laser des premières ouvertures à travers le film polymérique en utilisant le premier masque; (c) masquer le film avec un second masque qui possède des secondes zones de transmission laser définies à l’intérieur, chaque seconde zone tant alignée avec une première ouverture correspondante, et chaque seconde zone ayant un périmètre supérieur à la première ouverture correspondante; et (d) perforer les premières ouvertures en découpant au laser le film polymérique à l’aide du second masque, les premières ouvertures perforées définissant des secondes ouvertures dans le film.
EP08714425A 2008-03-17 2008-03-17 Double perçage au laser d'un film de fixation de circuit intégré de tête d impression Withdrawn EP2252427A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/AU2008/000379 WO2009114892A1 (fr) 2008-03-17 2008-03-17 Double perçage au laser d'un film de fixation de circuit intégré de tête d’impression

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EP2252427A1 true EP2252427A1 (fr) 2010-11-24

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EP08714425A Withdrawn EP2252427A1 (fr) 2008-03-17 2008-03-17 Double perçage au laser d'un film de fixation de circuit intégré de tête d impression

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EP (1) EP2252427A1 (fr)
KR (1) KR20100113600A (fr)
TW (1) TW200940352A (fr)
WO (1) WO2009114892A1 (fr)

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB8722085D0 (en) * 1987-09-19 1987-10-28 Cambridge Consultants Ink jet nozzle manufacture
US5291226A (en) * 1990-08-16 1994-03-01 Hewlett-Packard Company Nozzle member including ink flow channels
JPH0577425A (ja) * 1991-02-21 1993-03-30 Hewlett Packard Co <Hp> ノズルプレートおよびその製造方法
US7721441B2 (en) * 2006-03-03 2010-05-25 Silverbrook Research Pty Ltd Method of fabricating a printhead integrated circuit attachment film

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO2009114892A1 *

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KR20100113600A (ko) 2010-10-21
TW200940352A (en) 2009-10-01
WO2009114892A1 (fr) 2009-09-24

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