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Inkjet print head and manufacturing method thereof

An inkjet printing head and insulating layer technology, applied in printing and other directions, can solve the problems of reducing the reliability of the heater, heat accumulation, and increasing the input energy of the driving heater

Inactive Publication Date: 2009-02-18
SAMSUNG ELECTRONICS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When the passivation layer is formed on the electrodes and the heater, the step coverage deteriorates and reduces the reliability of the heater
Also, when the thickness of the passivation layer is increased for step coverage, the input energy for driving the heater increases, thus causing heat build-up

Method used

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  • Inkjet print head and manufacturing method thereof
  • Inkjet print head and manufacturing method thereof
  • Inkjet print head and manufacturing method thereof

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Embodiment Construction

[0022] Reference will now be made in detail to the exemplary embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to like elements throughout. The embodiments are described below in order to explain the present invention by referring to the figures.

[0023] Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

[0024] figure 1 is a cross-sectional view showing the structure of an inkjet printhead according to an embodiment of the present invention. Although only the unitary structure of the inkjet printhead is depicted in the drawings, a plurality of ink chambers and a plurality of nozzles are arranged in one or two rows in an inkjet printhead manufactured in a chip shape, and may also be arranged into three or more lines for better resolution.

[0025] Such as figure 1 As shown, the inkjet printhead manufactured acco...

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PUM

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Abstract

The invention provides an inkjet print head and a manufacturing method, including a substrate, an insulating layer formed on a surface of the substrate to have an electrode formation space, an electrode formed in the electrode formation space to be positioned on the same plane with the insulating layer, a heater formed on upper surfaces of the insulating layer and the electrode, and a passivation layer formed on the insulating layer and the heater The heater is formed to be flat on the insulating layer and the electrodes, thereby reducing the thickness of the passivation layer . Further, copper having relatively high electric conductivity is used as a material of the electrodes, which apply current to the heater to generate heat, instead of aluminum, thereby increasing a degree of freedom in the thickness of the electrodes. Further, uniform current can be applied to the respective heaters at different positions in single firing and full firing of ink, thereby reducing entire input energy and also improving ink ejection stability and reliability of the inkjet print head.

Description

technical field [0001] The present invention relates to an inkjet printhead and a manufacturing method thereof, and in particular, to a heat-driven type inkjet printhead and a manufacturing method thereof. Background technique [0002] An inkjet printhead is a device that ejects ink droplets onto a printing medium at a desired location to form an image of a specific color. Inkjet printheads are roughly classified into two types according to the mechanism of ejecting ink droplets: a thermal drive type and a piezoelectric drive type. The heat-driven type inkjet printhead generates air bubbles in ink by using a heat source, and ejects ink droplets by the expansion force of the air bubbles. The piezoelectric type inkjet printhead ejects ink droplets by applying pressure to ink due to deformation of piezoelectric elements. [0003] The mechanism of ejecting ink droplets in the thermally driven type inkjet printhead will now be described in detail. When a pulse current flows in...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B41J2/14B41J2/16
CPCB41J2/1639B41J2/1626B41J2/1632B41J2/1646B41J2/1643B41J2/1642B41J2/1631B41J2/14129B41J2/1645B41J2/1635B41J2/1603
Inventor 权明钟金兑珍韩银奉朴性俊
Owner SAMSUNG ELECTRONICS CO LTD
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