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    • 3. 发明授权
    • Thermal ink jet heater design
    • 热喷墨加热器设计
    • US06315398B1
    • 2001-11-13
    • US07963969
    • 1992-10-21
    • Cathie J. BurkeNarayan V. DesphandeWilliam G. HawkinsDale R. ImsMichael P. O'HoroGary A. KneezelThomas A. TellierIvan Rezanka
    • Cathie J. BurkeNarayan V. DesphandeWilliam G. HawkinsDale R. ImsMichael P. O'HoroGary A. KneezelThomas A. TellierIvan Rezanka
    • B41J205
    • B41J2/1604B41J2/14129B41J2/1628B41J2/1629B41J2/1631B41J2/1642B41J2/1646
    • The new heater element design has a pit layer which protects the overglaze passivation layer, PSG step region, portions of the Ta layer and dielectric isolation layer and junctions or regions susceptible to the cavitational pressures. Further, the inner walls of the pit layer define the effective heater area and the dopant lines define the actual heater area. In alternative embodiments, the dopant lines define the actual and effective heater areas, and an inner wall and a dopant line define the actual and effective heater areas. Further, when the new heater element designs are incorporated into printheads having full pit channel geometry and open pit channel geometry, the operating lifetime of the printhead is extended because the added protection of the pit layer prevents: 1) passivation damage and cavitational damages of the heater elements; and 2) degradation of heater robustness, hot spot formations and heater failures well into the 109 pulse range. The printhead incorporating the new heater element design can be incorporated into drop-on-demand printing systems of a carriage type or a full width type.
    • 新的加热器元件设计具有凹坑层,其保护釉面钝化层,PSG阶梯区域,Ta层和电介质隔离层的部分以及对空穴压力敏感的结或区域。 此外,凹坑层的内壁限定有效的加热器面积,并且掺杂剂线限定实际的加热器面积。 在替代实施例中,掺杂剂线限定实际和有效的加热器区域,并且内壁和掺杂剂线限定实际和有效的加热器区域。 此外,当新的加热器元件设计结合到具有全坑通道几何形状和露天通道几何形状的打印头中时,打印头的工作寿命延长,因为凹坑层的附加保护防止:1)钝化损伤和空穴损伤 加热元件; 和2)加热器鲁棒性,热点形成和加热器故障的恶化达到109脉冲范围。 包含新的加热器元件设计的打印头可以结合到托架型或全宽型的按需按需打印系统中。
    • 10. 发明授权
    • Ink jet printhead having a low cross talk ink channel structure
    • 具有低串扰油墨通道结构的喷墨打印头
    • US06079819A
    • 2000-06-27
    • US004640
    • 1998-01-08
    • Narayan V. DeshpandeJohn R. AndrewsDale R. Ims
    • Narayan V. DeshpandeJohn R. AndrewsDale R. Ims
    • B41J2/14B41J2/16B41J2/05
    • B41J2/14129B41J2/1404B41J2/1604B41J2/1623B41J2/1628B41J2/1629B41J2/1631B41J2/1632B41J2/1635B41J2/1642
    • An ink jet printhead is disclosed which has a heater plate containing the heating elements and driving circuitry means monolithographically formed on one surface thereof and the ink flow directing channel structure is formed on the heater plate using a layer of patternable polymeric material which, in one embodiment, is exposed using a mask to define the channel pattern then developed and cured. After curing, the patterned channel structure is polished to provide a smooth coplanar surface and a cover plate with an aperture therein is aligned and bonded to the channel structure to complete the printhead. The aperture serves as both ink inlet and a portion of the ink reservoir. The channels are open at one end and serve as the droplet ejecting nozzles, while the other ends are closed and extend beneath the cover plate aperture to provide a baffled portion of the ink reservoir and prevent cross-talk between the ink channels. In another embodiment, the channels ends opposite the nozzles open into a common recess with the channels walls extending therein to function as baffles and prevent cross-talk.
    • 公开了一种喷墨打印头,其具有包含加热元件的加热器板和在其一个表面上以光学方式形成的驱动电路装置,并且使用可图案化的聚合物材料层在加热器板上形成墨流动引导通道结构,在一个实施例中 ,使用掩模曝光以定义通道图案然后显影和固化。 在固化之后,对图案化的通道结构进行抛光以提供平滑的共面表面,并且其中具有孔的盖板对准并结合到通道结构以完成打印头。 该孔用作墨水入口和墨水储存器的一部分。 通道在一端开口并用作液滴喷嘴,而另一端封闭并延伸到盖板孔下方,以提供墨水容器的挡板部分并防止油墨通道之间的串扰。 在另一个实施例中,通道与喷嘴相对地开口,开口成共同的凹槽,通道壁延伸到其中,用作挡板并防止串扰。