CN102026817A - 液体排放头和制造该液体排放头的方法 - Google Patents

液体排放头和制造该液体排放头的方法 Download PDF

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Publication number
CN102026817A
CN102026817A CN2009801177171A CN200980117717A CN102026817A CN 102026817 A CN102026817 A CN 102026817A CN 2009801177171 A CN2009801177171 A CN 2009801177171A CN 200980117717 A CN200980117717 A CN 200980117717A CN 102026817 A CN102026817 A CN 102026817A
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China
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stream
circuit portion
laser beam
discharge head
liquid discharge
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CN2009801177171A
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CN102026817B (zh
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森田攻
北畠健二
及川悟司
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Canon Inc
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Canon Inc
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    • 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
    • B41J2/17503—Ink cartridges
    • B41J2/17513—Inner structure
    • 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
    • B23K26/0006—Working by laser beam, e.g. welding, cutting or boring taking account of the properties of the material involved
    • 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
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    • 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
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    • 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
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    • 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
    • B23K26/0661—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 disposed on the workpiece
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    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
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    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
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    • B29C66/242—Particular design of joint configurations particular design of the joint lines, e.g. of the weld lines said joint lines being closed or non-straight said joint lines being closed, i.e. forming closed contours
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    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
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    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/14—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using wave energy, i.e. electromagnetic radiation, or particle radiation
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    • B29C65/1696—Laser beams making use of masks
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
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    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
    • B29C66/73—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset
    • B29C66/739—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of the parts to be joined being a thermoplastic or a thermoset
    • B29C66/7392—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of at least one of the parts being a thermoplastic
    • B29C66/73921—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of at least one of the parts being a thermoplastic characterised by the materials of both parts being thermoplastics
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
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    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/81—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps
    • B29C66/812—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the composition, by the structure, by the intensive physical properties or by the optical properties of the material constituting the pressing elements, e.g. constituting the welding jaws or clamps
    • B29C66/8126—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the composition, by the structure, by the intensive physical properties or by the optical properties of the material constituting the pressing elements, e.g. constituting the welding jaws or clamps characterised by the intensive physical properties or by the optical properties of the material constituting the pressing elements, e.g. constituting the welding jaws or clamps
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Abstract

一种液体排放头包括液体排放基板(H1101)，所述液体排放基板(H1101)包含排放端口(H1107)；用于向液体排放基板提供液体的流路；能够吸收激光束的吸收部件(311)，其中构成流路的壁的一部分的第一流路部分(229)被形成在吸收部件的表面上；和对于激光束透明的透明部件(220)，其中构成流路的壁的另一部分的第二流路部分(239)被形成在透明部件的表面上；其中通过使用激光束在第一流路部分周边处将吸收部件的表面和透明部件的表面彼此焊接形成流路，并且其中通过凹部构成第二流路部分，该凹部包括能够反射被引向第一流路部分的激光束的倾斜表面(226)。

Description

液体排放头和制造该液体排放头的方法
技术领域
本发明涉及用于通过例如排放诸如墨的液体在记录介质上进行记录的液体排放头，以及制造该液体排放头的方法。特别地，本发明涉及执行喷墨记录的液体排放头。
背景技术
喷墨记录头是一般已知的液体排放头的例子。参考图11A到11C，简要地描述喷墨记录头的结构。
如图11A所示，喷墨记录头H1001包括用于排放墨的记录元件单元H1002和盒保持器(tank holder)单元H1003。
墨被从墨盒(未示出)通过形成在盒保持器单元H1003内的墨流路提供到记录元件单元H1002。
通过将图11B所示的盒保持器H1500结合到图11C所示的流路形成部件H1600，在盒保持器单元H1003中形成墨流路。
用于将盒保持器H1500结合到流路形成部件H1600的已知方法包括超声焊接(专利文献1)和激光焊接(专利文献2)。
在这些方法中，描述激光焊接法。术语“激光焊接”一般指的是这样的方法，该方法使对于激光束透明的部件以及能够吸收激光束的部件彼此接触，并且以激光束照射将被焊接的区域，以便将部件结合在一起。
与超声焊接相比，激光焊接具有在焊接部很少产生杂质的优点，并且被用作形成墨流路的有效手段。
参考图12A到13C，说明通过专利文献2中描述的激光焊接将盒保持器H1500结合到流路形成部件H1600的方法。图13A到13C是图12A和12B所示的盒保持器H1500和流路形成部件H1600的示意截面图。
使用按压夹具(press jig)510使得能够吸收激光束的盒保持器H1500和对于激光束透明的流路形成部件H1600彼此接触(图12A和13A)。然后，在盒保持器H1500和流路形成部件H1600彼此接触时，以激光束照射接触表面600(图12B和13B)，从而形成墨流路(图13C)。
激光照射法的例子包括专利文献2中描述的扫描法和同时照射法。
作为扫描法，如图12B和13B所示，通过集中从激光照射装置500发出的激光束的光斑直径，以扫描方式沿着轨迹以激光束照射所希望的结合表面。
作为同时照射法，以激光束一下子(in one go)照射所希望的结合表面。
[专利文献1]日本专利公开No.2007-283668
[专利文献2]USP7261397
发明内容
技术问题
由于墨流路和结合表面具有精细的结构，扫描法和同时照射法具有下面的问题。
扫描法具有这样的问题，即需要非常长的时间来沿着精细轨迹扫描结合表面以便焊接该表面。
具体来说，如图11B和11C所示，喷墨记录头的结合表面H1602和墨流路H1601具有精细结构，该精细结构具有非常小的宽度。如图13B所示照射除墨流路H1601之外的区域极其费时。因此，扫描法不适合制造大量喷墨记录头。
另一方面，由于与扫描法相比焊接所需要的时间更少，因此同时照射法适合于制造大量喷墨记录头。
通常，为了通过激光焊接将部件结合在一起，以激光束仅照射将被焊接的区域。然而，当结合表面具有精细结构时(诸如形成喷墨记录头中的墨流路的情况)，在相应于精细墨流的区域中提供掩膜并且以激光束仅照射该结合表面是困难的。
具体来说，如图14B所示，同时以激光束照射接触表面600和将成为墨流路H1601的区域两者。因此，如图14C所示，可能由激光束在墨流路H1601的表面上形成受损部分620。
墨流路H1601中的受损部分620可能阻挡墨流，并且可能降低喷墨记录头H1001的可靠性。
本发明提供了这样的喷墨记录头，其中当通过以激光束照射包括墨流路的区域来将形成墨流路的部件焊接在一起时，减少了由于激光束引起的对墨流路的损坏。
附图说明
结合在本说明书中并且构成本说明书的一部分的附图示出了本发明的实施例，并且与本描述一起用于解释本发明的原理。
图1A是示出了根据本发明的实施例的喷墨记录头的激光焊接处理的示意图；
图1B是示出了根据本发明的实施例的喷墨记录头的激光焊接处理的示意图；
图1C是示出了根据本发明的实施例的喷墨记录头的激光焊接处理的示意图；
图2A是本发明的第一例子的说明图；
图2B是本发明的第一例子的说明图；
图2C是本发明的第一例子的说明图；
图3A是示出了本发明的第一例子的另一配置的示图；
图3B是示出了本发明的第一例子的另一配置的示图；
图3C是示出了本发明的第一例子的另一配置的示图；
图4A是本发明的第一实施例的说明图；
图4B是本发明的第一实施例的说明图；
图4C是本发明的第一实施例的说明图；
图5A是示出了本发明的第一实施例的另一配置的示图；
图5B是示出了本发明的第一实施例的另一配置的示图；
图5C是示出了本发明的第一实施例的另一配置的示图；
图5D是示出了本发明的第一实施例的另一配置的示图；
图6A是本发明的第二例子的说明图；
图6B是本发明的第二例子的说明图；
图6C是本发明的第二例子的说明图；
图7A是示出了本发明的第二例子的另一配置的示图；
图7B是示出了本发明的第二例子的另一配置的示图；
图7C是示出了本发明的第二例子的另一配置的示图；
图8A是本发明的第二实施例的说明图；
图8B是不采用第二实施例的情况的说明图；
图9A是示出了可以应用本发明的一般喷墨记录头的示图；
图9B是示出了可以应用本发明的一般喷墨记录头的示图；
图10是示出了一般喷墨记录头的记录元件基板的示图；
图11A是现有技术的一般喷墨记录头的说明图；
图11B是现有技术的一般喷墨记录头的说明图；
图11C是现有技术的一般喷墨记录头的说明图；
图12A是已有激光焊接法的说明图；
图12B是已有激光焊接法的说明图；
图13A是扫描激光焊接法的说明图；
图13B是扫描激光焊接法的说明图；
图13C是扫描激光焊接法的说明图；
图14A是同时照射激光焊接法的说明图；
图14B是同时照射激光焊接法的说明图；和
图14C是同时照射激光焊接法的说明图。
具体实施方式
通过一般喷墨记录头的例子描述用于一个实施例的液体排放头。
在本描述中，术语“记录”不仅指形成诸如字符或图形的有意义的信息，而且指形成无意义的信息，而不论该信息是否是人眼可视觉察觉的。另外，该术语还指的是在记录介质上形成图像、设计、图案等，或处理记录介质。
术语“记录介质”不仅指用于记录装置的一般纸张，而且指可以接收墨的任意材料(诸如布、塑料膜、金属板、玻璃、陶瓷、木头和皮革)。
术语“墨”应被广义地解释为术语“记录媒介”，指的是可用于在记录介质上形成图像、设计、图案等的液体；用于处理记录介质的液体；和用于处理墨的液体。因此，术语“墨”指的是可关于记录被使用的任意液体。
喷墨记录头包括用于排放墨的排放端口，以及与排放端口连通以便向排放端口提供墨的墨流路。
参照图9A到9C，描述构成记录头盒体(cartridge)的喷墨记录头。
如图9A所示，记录头盒体10包括喷墨记录头20和墨盒40。墨盒40被可拆卸地安装在喷墨记录头20上。
通过托架(未示出)的定位部件和电触点，记录头盒体10以可拆卸的方式被该托架支撑并且固定到该托架。该托架被安装在喷墨记录装置(未示出)中，该喷墨记录装置在下文将被仅称为记录装置。
墨被从墨盒40提供到喷墨记录头20。喷墨记录头20通过根据从记录装置发送的电信号驱动记录元件，从设置在记录元件基板H1101中的墨排放端口排放墨。记录元件的例子包括放热(exothermic)元件和压电元件。此处描述使用放热元件的喷墨记录头。
图9B是图9A所示的喷墨记录头20的分解透视图。
喷墨记录头20包括记录元件单元300和盒保持器单元200。记录元件单元300包括电气布线基板340和记录元件基板H1101。
电气布线基板340具有用于将电气布线基板340连接到记录装置的连接端子341、用于将电气布线基板340连接到记录元件基板H1101的电极端子(未示出)、用于将连接端子341连接到电极端子的布线，和用于结合记录元件基板H1101的开口。
电气布线基板340被以例如下面的方式连接到记录元件基板H1101：向记录元件基板H1101的电极部以及向电气布线基板340的电极端子涂布导电热固性粘合树脂；挤压电极部和电极端子并且使用加热工具对它们进行加热，从而电极部和电极端子同时被电连接。以密封化合物密封在其中电极部和电极端子电连接的区域，从而保护该区域不受墨侵蚀或不受外部冲击的影响。
图10是用于描述作为用于排放墨的液体排放基板(液体排放单元)的记录元件基板H1101的结构的部分截面透视图。
记录元件基板H1101包括用于排放墨的排放端口H1107，以及与该排放端口连通并且向排放端口提供墨的供墨端口H1102。该排放端口在排放端口形成部件H1106中形成，并且该供墨端口在硅基板H1110中形成。
硅基板H1110具有0.5到1.0mm的厚度。通过各向异性蚀刻在硅基板H1110中形成供墨端口H1102。另外，在硅基板H1110上形成放热元件H1103。以排放端口H1107相应于放热元件H1103的方式通过光刻在硅基板H1110中形成排放端口H1107。另外，由Au等形成的凸块(bump)H1105被设置在硅基板H1110上。凸块H1105作为用于提供用于驱动放热元件H1103的电信号以及电力的电极部。
参考图9B，详细描述构成表征本发明的特征的流路形成部件的一部分的盒保持器单元200。
如图9B所示，盒保持器单元200由盒保持器210和第二流路形成部件220构成。盒保持器210包括第一流路形成部件211，并且保持墨盒40。第二流路形成部件220结合到盒保持器210以便形成墨流路。第二流路形成部件220具有开口250，墨流路通过开口250与记录元件基板H1101连通。流路形成部件被设置在墨盒40和记录元件基板H1101之间。记录元件基板H1101相应于液体排放基板。流路形成部件用于通过墨流路从墨盒40向记录元件基板H1101提供墨。
在本发明的实施例中，第一流路形成部件211被与盒保持器210成一体地形成。然而，第一流路形成部件211和盒保持器210可独立地形成。在这种情况下，第一流路形成部件211被附接到盒保持器210。
第一流路形成部件211在其表面中具有第一流路部分229。第一流路部分229构成墨流路224的壁的一部分。第二流路形成部件220在其表面中具有第二流路部分239(未示出)。第二流路部分239构成墨流路224的壁的一部分。第一流路形成部件211和第二流路形成部件220以第一流路部分229和第二流路部分239被设置于它们之间的方式被结合在一起，从而形成墨流路224。为了提供该结构，第一流路部分和第二流路部分中的至少一个被形成为第一流路形成部件和第二流路形成部件中的相应一个的表面中的凹部(凹槽)就足够了。
为了通过激光焊接将第一流路形成部件211和第二流路形成部件220结合在一起，这些流路形成部件中的一个必须对于激光束是透明的，并且这些流路形成部件中的另一个必须能够吸收激光束。
在本发明的实施例中，第二流路形成部件220对于激光束是透明的，并且第一流路形成部件211能够吸收激光束，从而可容易地以激光束照射流路形成部件。可以适当地改变哪个流路形成部件具有透明性或吸收性。
在本发明中，短语“对于激光束透明的透明部件”指的是这样的部件，即当厚度为2.0mm的该部件被激光束照射时，该部件具有等于或大于30％的透射率。短语“能够吸收激光束的吸收部件”指的是这样的部件，即当厚度为2.0mm的该部件被激光束照射时，该部件具有等于或大于90％的吸收率。通过使用具有这样的透射率和吸收率的部件，透明部件和吸收部件可被激光焊接。
下面，将参考附图详细描述本发明的特定实施例。
第一例子
参考附图详细描述本发明的第一个例子。
图1A到1C是示出了将第二流路形成部件220附接到盒保持器210的处理的透视图，第一流路形成部件211被形成在盒保持器210中。如图1A所示，第一流路形成部件211具有第一流路部分229，第一流路部分229形成墨流路的壁的一部分。第二流路形成部件220具有第二流路部分239(在图2A和2B中示出)，第二流路部分239形成该墨流路的壁的一部分。图1A中省略了在下面描述的第二流路形成部件220中形成的反射部分的结构。
图1A示出了这样的处理，该处理制备第二流路形成部件220和与盒保持器210成一体地形成的第一流路形成部件211，并且使得第一流路形成部件211和第二流路形成部件220彼此接触。
图1B示出了这样的处理，即在完成了图1A所示的处理之后，使用激光照射装置51以激光束照射第一流路形成部件211和第二流路形成部件220。使用按压夹具53按压第二流路形成部件220。按压夹具53被配置为使得，在第一流路形成部件的各部分之中，形成墨流路的壁的一部分的第一流路部分229的周边可被激光束照射。在第一流路形成部件211和第二流路形成部件220彼此紧密接触的状态下，通过第二流路形成部件220以从激光照射装置51发出的激光束照射第一流路形成部件211的第一流路部分229以及第一流路部分229的周边。
图1C示出了第二流路形成部件220和第一流路形成部件211结合在一起(以便提供盒保持器单元200)的状态。
图2A是沿着图1A的线IIA-IIA截取的截面图，图2B是沿着图1B的线IIB-IIB截取的截面图，并且图2C是沿着图1C的线IIC-IIC截取的截面图。参考图2，描述第一流路形成部件和第二流路形成部件的特定结构。
如图2A所示，在第一个例子中，反射被引向形成墨流路224的壁的一部分的第一流路部分229的激光束52的反射部分225由倾斜表面构成。该倾斜表面可以包括平面和曲面，并且下文可对于该倾斜表面使用术语“反射部分”。反射部分225被设置在作为透明部件的第二流路形成部件220的一侧面上，第二流路形成部件220在该侧面被激光束52照射。作为透明部件的第二流路形成部件220具有第一表面220a 和与第一流路形成部件211接触的第二表面220b，第二流路形成部件220在第一表面220a被激光束52照射。即，第二表面220b是面向第一流路形成部件211的表面，并且第一表面220a是与面向第一流路形成部件211的表面相对的表面。
除了下面描述的接触表面223、反射部分225和用于使记录元件单元300(图9B)与其结合的部件之外，第一表面220a和第二表面220b的主面大体彼此平行。
反射部分225由这样的平面构成，该平面被配置为使得激光束以例如等于或大于45度的入射角theta1入射在反射部分225的平面上。由于激光束大体垂直地入射到第一表面220a和第二表面220b的主面上，入射角theta1大体与倾斜表面相对于第一表面220a和第二表面220b的主面倾斜的角度相同。
如图2B所示，由于反射部分225被设置在朝向第一流路部分229发射的激光束52的路径中，反射部分225反射被引向第一流路部分229的激光束52的一部分或全部，从而起到减少到达第一流路部分229的激光束的比例的作用。因此，防止墨流路如参照图14C所述地被损坏。通过使得反射部分225的表面相对于第一表面220a的主面倾斜，从而激光束以大的入射角theta1入射到第二流路形成部件上，可以增加被引向第一流路部分229的激光束之中的被反射部分225反射的激光束的比例。
描述未被反射部分225反射的激光束穿过第二流路形成部件的情况。在该例子中，反射部分被设置在第二流路形成部件的第一表面220a上，并且当激光束穿过反射部分225进入第二流路形成部件时激光束被折射。因此，防止已穿过第二流路形成部件的激光束被引向第一流路部分229。即使激光束到达了第一流路部分229，由于到达第一流路部分的激光束已由于反射部分225处的反射和穿过第二通道形成部件而被衰减，因此由激光束引起的对第一流路部分229的损坏小。
可适当地设置反射部分相对于第二通道形成部件的第一表面的主面倾斜的倾角、即入射角theta1，从而反射部分可以反射激光束，这是由于该角度取决于激光束的波长lambda和反射部分225的镜面反射系数(specularity)。
接着，详细描述这样的焊接部，在该焊接部处第一流路形成部件和第二流路形成部件被焊接在一起。第一流路形成部件211和第二流路形成部件220被配置为在被激光束照射的流路部分239和流路部分229的周边彼此接触，其中流路部分229和流路部分239构成墨流路224的壁的部分。第一流路形成部件211和第二流路形成部件220还配置为在未被激光束照射的部分处不彼此接触。
第一流路形成部件211和第二流路形成部件220在接触表面223上彼此接触。通过提供接触部分和非接触部分，可以这样的方式使得第一流路形成部件211和第二流路形成部件220彼此接触，即仅向接触部分(接触表面223)施加压力，从而提高接触部分(接触表面223)处的结合力。
如图2B所示，当以激光束照射接触表面223时，第一流路形成部件211(吸收部件)中包含的染料或颜料被加热，并且该染料或颜料的树脂被熔化。此时产生的热被传递到第二流路形成部件220。第二流路形成部件220被该热熔化，从而形成结合表面230。此时，热通过接触表面223被有效率地传递。另外，由于如上所述接触表面223处的结合力高，图2C中所示的结合表面230是牢固的。
在第一个例子中，设置在第一表面220a上的反射部分225被配置为反射朝向构成墨流路的壁的一部分的第一流路部分229发射的激光束的一部分或全部。反射部分225的形状不限于图2所示的形状，也不受墨流路224的截面形状限制。能够反射激光束的一部分或全部的其它配置具有类似优点。
参考图3，描述第一个例子的其它配置。
在图3A中，仅第二流路形成部件220的流路部分239形成为第二表面220b中的凹部(凹槽)。当第一和第二流路形成部件被结合在一起时，墨流路224具有大体为矩形的截面。采用这种结构，第一流路形成部件的表面可被形成为是平的。
在图3B中，第一流路形成部件211的流路部分229和第二流路形成部件220的流路部分239两者形成为凹部(凹槽)。如图3B所示，当第一和第二流路形成部件被结合在一起时，墨流路224具有大体为圆形的截面。由于墨流路224的截面大体为圆形，这种结构具有杂质或气泡不容易堵塞墨流路的优点。
在图3C中，与图2A到2C中所示的从第一表面220a突出的形状相反，反射部分225具有凹陷的形状。采用这种结构，如上所述可以抑止当组装喷墨记录头时发生的组件之间的干扰。另外，可以减小流路形成部件的厚度以便使记录头小型化。
在该实施例中，使用透明Noryl“TPN9221”(由以前是GE Plastics的SABIC Innovative Plastics制造)作为透明部件的材料。透明Noryl是允许激光束从中穿过并且高度抗墨侵蚀的透明材料。替换地，不包括着色材料的透明Noryl“TN300”(由SABIC Innovative Plastics制造)可被用作透明部件的材料。
术语“Noryl”是改性聚苯醚或改性聚亚苯醚的普通名称。Noryl是通过对聚苯醚(聚亚苯醚)进行改性从而提供强抗酸碱性而制成的热塑树脂。
使用包括吸收激光束的染料或颜料的黑Noryl“SE1X”(由SABIC Innovative Plastics制造)作为吸收部件的材料。
在上面的描述中，使用第一表面上的反射部分由两个平面构成的例子。然而，反射部分的结构不限于该例子。具体地说，只要该反射部分被设置在第一表面上以使得激光束可被反射，则可由一个平面、三个或更多平面、一个或多个曲面、或平面和曲面的组合构成反射部分。
第一实施例
接着，描述本发明的第一实施例。
由于激光焊接方法和用于流路形成部件的材料类似于第一例子中的方法和材料，因而在此不对该方法和材料进行描述。详细描述设置在第二流路形成部件220中的表征本发明的特征的反射部分的结构，第二流路形成部件220是透明部件。
如图4A所示，在第一实施例中，在第二流路形成部件220的第二表面220b中形成反射部分226，并且反射部分226构成墨流路224的一部分。
参考图4B，由于第二流路形成部件220(透明部件)的第一表面220a是平的，因此激光束52穿过第一表面220a，并且该激光束被形成在第二表面220b中的反射部分226反射。
如上面使用图2A所述，在第一例子中，反射部分225以突出方式形成在第一表面220a上。然而，通过第一实施例的结构，不必在第一表面220a上以突出方式形成反射部分。因此，当如图9所示组装喷墨记录头时，减少了盒保持器单元200的第二流路形成部件220和记录元件单元300的组件之间干扰的可能性。
通过第一实施例，由于被反射部分226反射的激光束52不被引向激光照射装置51，激光照射装置较不可能被损坏。
图5A到5D示出了第一实施例的其它配置。如图5A到5D中所示，通过在第一流路形成部件中形成壁的一部分的第一流路部分229中形成凹槽，可以使得被与墨流动方向垂直地截取的墨流路224的截面的面积大。
如图5A所示，当垂直于墨流动方向截取截面时，构成第一流路部分229的凹部具有半圆截面。通过半圆截面，墨在墨流路中平滑地流动，从而当墨被强制通过墨流路224时，气泡和杂质可被容易地去除。
在第一实施例中，反射部分226可被以如下方式形成，即已穿过第一表面的激光束52被反射部分的平面或曲面反射。可以由透明部件的折射率和填充墨流路224的材料的折射率，确定激光束52在该平面或曲面的切面上的适当的入射角theta2，即反射部分226相对于第二表面220b的主面的倾角。
例如，对于具有在800到1000nm范围内的波长lambda的激光束，由普通透明树脂制成的透明部件的折射率近似为1.5。如果以具有近似为1.0的折射率的空气填充墨流路224，当反射部分226被配置为使得激光束在该平面或曲面的切面上的入射角theta2大于近似42度时，激光束可被反射部分226完全反射，42度是临界角。
即使入射角theta2小于该临界角，当反射部分被如图4B和5A到5D所示那样配置时，由于当激光束穿过反射部分226时激光束被折射，因此防止激光束被引向第一流路部分229。
如上所述，在该实施例中，使用透明Noryl“TPN9221”(由SABICInnovative Plastics制造)作为第二通道形成部件。在该实施例中，作为例子使用具有808nm的波长lambda的激光束，并且第二通道形成部件的折射率在该波长近似为1.57。因此，在该实施例中，反射部分226相对于第二表面的主面的入射角被设定为使得激光束以大于近似40度的入射角theta2入射到反射部分226的平面或切面上。
由于构成墨流路的壁的一部分的流路部分像这样由反射部分形成，不必在第一表面上形成该反射部分。因此，可使得第二流路形成部件的第一表面是平的，从而减小了当组装喷墨记录头时组件之间干扰的可能性。
如上面根据第一实施例所述，设置在第二流路形成部件的第二表面上的表征本发明的特征的反射部分被配置为能够反射激光束是足够的。具体来说，可由一个或多个平面或平面和曲面的组合构成该反射部分。
第二例子
接着，描述本发明的第二例子。
在这个例子中，反射部分被形成在第二流路形成部件220的第一表面220a和第二表面220b上，以便防止在墨流路中形成如图4C所示的拐角部分231。如可从图9A看到的，在喷墨记录头正被使用时，拐角部分231被定位在喷墨记录头的沿重力方向的下部中。
具体来说，如图6A所示，反射部分228被形成在第二表面220b中，从而反射部分228反射被引向墨流路的激光束52的一部分。另外，在第一表面220a的一个区域上形成反射部分227，该区域相应于第二表面220b的未形成反射部分228的区域。
如图6B所示，通过这种结构，被引向墨流路的激光束52被反射部分227和228反射，从而减少了到达墨流路224的激光束的比例。
另外，由于在喷墨记录头正被使用时，在喷墨记录头的沿重力方向的下部中不存在拐角部分，因此当墨被强制通过墨流路224时，墨可以平滑地流过墨流路，从而可以容易地去除气泡和杂质。
另外，由于与第一实施例中的反射部分相比，形成在第二流路形成部件220的第一表面220a上的反射部分较小，因此尽管该反射部分具有突出形状，但是第二流路形成部件220和记录元件单元300的组件之间干扰的可能性被减小。
另外，尽管形成在第一表面220a中的反射部分具有凹陷形状，但是由于反射部分小，因此相应于墨流路的第二流路形成部件220的厚度未被显著减小，从而不会严重影响第二流路形成部件220的可成形性。
图7所示的第二例子的其它配置具有相同优点。
如上所述，通过第二例子，在第二流路形成部件220中/在第二流路形成部件220上形成的倾斜表面(反射部分)反射激光束，从而减少到达墨流路224的激光束的比例。另外，形成墨流路的壁的一部分的第一流路部分229的周边(接触表面223)可被激光束照射，从而该周边被焊接。换句话说，在第二例子中，第一和第二流路形成部件的主面被激光束垂直地照射，并且在第一表面220a和第二表面220b中的至少一个中/上在这样的区域中形成用于反射激光束的倾斜表面，墨流路224在激光束方向上被投影到该区域上。
通过这种结构，当利用激光焊接在喷墨记录头中形成墨流路时，墨流路较不可能被损坏。
第二实施例
接下来，描述本发明的第二实施例。
对于与第一实施例以及第一例子和第二例子类似的结构，省略对其的描述，并且对于相应部分应用类似的附图标记。由于激光焊接方法以及流路形成部件和流路板的材料与第一实施例以及第一例子和第二例子类似，省略对该方法和材料的描述。
通过采用第二实施例的结构取代第一实施例的结构，进一步减小了由激光束引起的对第一流路部分的损坏。参考图8A和8B，详细描述第二实施例。
图8A是用于描述第一流路部分229的结构的沿着图1B的VIIIB-VIIIB截取的截面图。图8B是用于描述对于未采用该实施例的结构的墨流路224造成的损坏的说明图。
如图8B所示，可在由已穿过开口250的激光束照射的第一流路部分229的区域229a中通过激光照射形成受损部分620，该开口250被形成在第二流路形成部件220中。即，形成在第一流路部分的区域229a中的受损部分620被未穿过第二流路形成部件的激光束52直接照射，第二流路形成部件是透明部件。由已穿过开口250并且直接照射第一流路部分的区域229a的激光束对该区域造成的损坏大于已穿过第二流路形成部件的激光束对第一流路部分229造成的损坏。
采用第二实施例，通过下列结构减少了激光束对区域229a造成的损坏。
如图8A所示，在该实施例中，被激光束直接照射的墨流路224的区域229a由相对于第一流路形成部件的表面的主面倾斜的倾斜表面260构成。倾斜表面260具有圆锥形状。采用这种结构，直接照射倾斜表面260的激光束的入射角theta3变大，从而与图8B所示的区域229a不由倾斜表面260构成的情况相比，由激光向区域229a的单位面积提供的能量的量变得较小。另外，如果激光束的一部分被倾斜表面260反射并且剩余部分被吸收，则由激光向区域229a的单位面积提供的能量的量变得更小。因此，可以减小激光束对于区域229a造成的损坏。
倾斜表面260的结构不限于图8A的配置。只要倾斜表面260相对于激光束52的方向倾斜，就可以获得与图8A所示结构类似的优点。例如，该倾斜表面可由平面或曲面、两个或多个平面或曲面、或平面和曲面的组合构成。
虽然已经参考示例实施例描述了本发明，应当理解本发明不限于公开的示例实施例。下列权利要求的范围与最宽解释一致，以便包含所有这些修改和等同结构和功能。
本申请要求提交于2008年5月19的日本专利申请No.2008-130762和提交于2009年4月27的日本专利申请No.2009-107880的权益，通过引用将这两个日本专利申请完整结合在此。
附图标记说明
20喷墨记录头
51激光照射装置
52激光束
224墨流路
211第一流路形成部件(吸收部件)
220第二流路形成部件(透明部件)
220a第一表面
220b第二表面              ＊
225～228倾斜表面(反射部分)
229第一流路部分
239第二流路部分
H1001记录元件基板
H1107排放端口

Claims (13)

1.一种液体排放头，包括：
液体排放基板，所述液体排放基板包括用于排放液体的排放端口；
流路，所述流路用于向所述液体排放基板提供液体；
吸收部件，所述吸收部件能够吸收激光束，其中构成所述流路的壁的一部分的第一流路部分被形成在所述吸收部件的表面上；和
透明部件，所述透明部件对于激光束是透明的，其中构成所述流路的壁的另一部分的第二流路部分被形成在所述透明部件的表面上，
其中，通过使用穿过所述透明部件朝向所述第一流路部分和所述第一流路部分的周边发射的激光束在所述第一流路部分的所述周边处将所述吸收部件的所述表面和所述透明部件的所述表面彼此焊接，形成所述流路，并且
其中，所述第二流路部分由所述透明部件的所述表面的主面中的凹部构成，并且所述凹部包括倾斜表面，所述倾斜表面以所述倾斜表面能够反射被引向所述第一流路部分的激光束的方式相对于所述透明部件的所述表面的所述主面倾斜。
2.如权利要求1所述的液体排放头，其中所述第一流路部分由所述吸收部件的所述表面的主面中的凹部构成。
3.如权利要求2所述的液体排放头，其中构成所述第一流路部分的所述凹部具有半圆形截面，垂直于液体在所述流路中的流动方向截取所述截面。
4.如权利要求2所述的液体排放头，其中构成所述第一流路部分的所述凹部包括垂直于所述吸收部件的所述表面的所述主面的平面。
5.如权利要求1所述的液体排放头，其中所述第二流路部分的所述倾斜表面由平面或曲面构成。
6.如权利要求1所述的液体排放头，其中所述第二流路部分的所述倾斜表面由两个平面构成。
7.如权利要求1所述的液体排放头，其中所述第二流路部分与所述透明部件成一体地形成。
8.如权利要求1所述的液体排放头，其中所述第一流路部分与所述吸收部件成一体地形成。
9.如权利要求1所述的液体排放头，其中在所述透明部件内形成开口，所述流路通过所述开口与所述液体排放基板连通，并且其中被穿过所述开口的激光束照射的所述第一流路部分的区域包括相对于所述吸收部件的所述表面的所述主面倾斜的倾斜表面。
10.如权利要求9所述的液体排放头，其中所述第一流路部分的所述倾斜表面由平面或曲面构成。
11.如权利要求1所述的液体排放头，其中所述流路被设置在所述液体排放基板和用于容纳被提供给所述液体排放基板的液体的墨盒之间，并且其中所述液体排放基板通过所述流路与所述墨盒连通。
12.如权利要求11所述的液体排放头，其中所述液体排放头包括用于保持所述墨盒的盒保持器，并且所述盒保持器的一部分构成所述吸收部件。
13.一种用于制造液体排放头的方法，所述液体排放头包括液体排放基板和流路，所述液体排放基板包括用于排放液体的排放端口；并且所述流路向所述液体排放基板提供液体，所述方法包括以下步骤：
制备能够吸收激光束的吸收部件，其中构成所述流路的壁的一部分的第一流路部分被形成在所述吸收部件的表面上；
制备对于激光束透明的透明部件，其中构成所述流路的壁的另一部分的第二流路部分被形成在所述透明部件的表面上；以及
通过使用穿过所述透明部件朝向所述第一流路部分和所述第一流路部分的周边发射的激光束在所述第一流路部分的所述周边处将所述吸收部件的所述表面和所述透明部件的所述表面彼此焊接，形成所述流路，
其中，所述第二流路部分由所述透明部件的所述表面的主面中的凹部构成，并且所述凹部包括倾斜表面，所述倾斜表面以这样的方式相对于所述透明部件的所述表面的所述主面倾斜，即所述倾斜表面能够反射被引向所述第一流路部分的激光束。
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