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Inkjet printhead having thermal bend actuator heating element electrically isolated from nozzle chamber ink

一种喷墨打印头、喷嘴腔的技术，应用在电气元件、电固体器件、半导体器件等方向，能够解决突变失效等问题

Inactive Publication Date: 2005-07-13
ZAMTECH GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This allows normal failure of the actuator, resulting in catastrophic failure

Method used

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  • Inkjet printhead having thermal bend actuator heating element electrically isolated from nozzle chamber ink
  • Inkjet printhead having thermal bend actuator heating element electrically isolated from nozzle chamber ink
  • Inkjet printhead having thermal bend actuator heating element electrically isolated from nozzle chamber ink

Examples

Experimental program
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Embodiment Construction

[0140] The preferred embodiment is a 1600 dpi modular single-chip printhead suitable for use in various pagewidth printers and print-on-demand camera systems. The printhead is fabricated using microelectromechanical systems (MEMS) technology, which refers to mechanical systems built on the micron scale, typically using techniques developed for the manufacture of integrated circuits.

[0141] Since a 1600dpi A4 photo-quality page-wide printer requires more than 50,000 nozzles, integrating the driver circuitry on the same chip as the printhead is key to achieving low cost.

[0142] The number of wires that integration allows from the outside world to the printhead is reduced from about 50,000 to about 100. To provide the drive circuitry, the preferred embodiment integrates CMOS logic and drive transistors on the same wafer as the MEMS nozzle. MEMS offers several major advantages over other manufacturing technologies:

[0143] Mechanisms can be constructed at micron-scale dimen...

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PUM

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Abstract

An inkjet printhead includes a number of nozzle arrangements formed on a substrate. Each nozzle assembly includes: a nozzle chamber, a nozzle opening through which ink is ejected from the nozzle chamber, a movable member in the nozzle chamber that contacts the ink to eject the ink and a thermally flexible actuator. actuator. The thermal bending actuator has a proximal end anchored to the base and a distal end connected to the movable element. The actuator includes a first portion adjacent to the proximal end and having a conductive heating circuit layer for heating the actuator, and a second end portion extending to The movable element is in contact with the ink in the ink cavity. An insulating slot electrically insulates the first and second portions from each other so that electrical energy in the heating circuit layer is not conducted to the ink by the actuator.

Description

technical field [0001] The present invention relates to the structure of microelectromechanical devices such as inkjet printers, and specifically discloses a method of electrically insulating a liquid container. Background technique [0002] More recently, for example in PCT application PCT / AU98 / 00550, the applicant has proposed an inkjet printing device which, in the construction of a thermal bending actuator type device for ejecting liquid from a nozzle chamber, employs a A microelectromechanical (MEMS) processing technology. [0003] In any such thermal actuator type device, a commonly employed technique is to operate the thermal bending actuator via a selective resistive heating element. Problems can arise with the use of conductive heating elements in the vicinity of a liquid supply, whereby the liquid supply interferes with the flow of electrons in the conductive element and the electrolysis products. This can result in a general failure of the actuator leading to a ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B41J2/05B41J2/055B41J2/14B41J2/045B41J2/16
CPCB41J2/04528B41J2/04553B41J2/04563B41J2/0457B41J2/04585B41J2/04588B41J2/0459B41J2/04591B41J2/04596B41J2/04598B41J2/14427B41J2/1623B41J2/1628B41J2/1629B41J2/1631B41J2/1632B41J2/1635B41J2/1637B41J2/1639B41J2/1642B41J2/1645B41J2/1646B41J2/1648B41J2002/14435B41J2002/14443B41J2/05
Inventor 卡·西尔弗布鲁克
Owner ZAMTECH GMBH
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