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Drop injecting device and injecting controlling method therefor

A technology of droplet spraying and control method, which is applied in the direction of surface coating liquid device, semiconductor/solid-state device manufacturing, coating, etc., which can solve the problem that it is difficult to determine whether the liquid viscosity has been obtained

Inactive Publication Date: 2007-09-12
SEIKO EPSON CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, by varying the heating temperature, it is difficult to determine whether the desired liquid viscosity has been obtained

Method used

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  • Drop injecting device and injecting controlling method therefor
  • Drop injecting device and injecting controlling method therefor
  • Drop injecting device and injecting controlling method therefor

Examples

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no. 1 example

[0031] The structure of the inkjet device 100:

[0032] First, the structure of an inkjet apparatus 100 according to the present invention will be described with reference to FIG. 1 .

[0033] FIG. 1 is a schematic diagram showing a functional structure of an example of an inkjet apparatus 100 according to the present invention. The inkjet device 100 is used to make the 14 h 30 (tetradecane) or the like is attached to the device at a specific position on the substrate 126, and forms a desired conductive thin film pattern on the substrate 126.

[0034] The inkjet apparatus 100 has an X-direction driving device 110 as means for conveying a head unit, and a Y-direction driving device 120 as a means for conveying a substrate on a base 102 . The lower chassis 102 has a head drive control circuit 130 . It should be noted that in the drawings, the X direction, the Y direction, and the Z direction are orthogonal to each other.

[0035] The X-direction drive device 110 includes an...

no. 2 example

[0061] The structure of the inkjet apparatus according to the second embodiment:

[0062] Next, an explanation will be given of an inkjet apparatus according to a second embodiment. It should be noted that the inkjet device of this embodiment differs from that shown in FIG. 1 particularly in the structure of the viscosity measuring device 140 . Hereinafter, an explanation will be given of the viscosity measuring device 140A used in the present embodiment with reference to FIG. 7 . It should be noted that, in order to avoid repetition of the same explanation, the same reference numerals are applied to components of similar structure to the inkjet apparatus 100 in FIG. 1 . Such same reference numerals will also be used in the other embodiments below.

[0063] The viscosity measurement device 140A provides a measurement circuit 162 in which a crystal oscillator is provided. The crystal oscillator is connected to the electrode unit 160 immersed in the liquid 154 . The measuremen...

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PUM

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Abstract

An inkjet device 100 has an inkjet head 114 for ejecting a liquid, in response to an ejection waveform, in the form of a droplet, the liquid being supplied from a liquid storage tank 150. Inkjet device also has a determining unit 174 for determining whether a measured viscosity of a liquid in liquid storage tank 150 is within a range of the liquid being ejectable, and a control unit 176 for, when a result of the determination by determining unit 174 is affirmative, applying an ejection waveform corresponding to a measured viscosity to an ejection of a droplet in inkjet head 114, while when a result of the determination by determining unit 174 is negative, suspending ejection of a droplet in inkjet head 114.

Description

technical field [0001] The present invention relates to a droplet ejection device for ejecting liquid droplets, and also to an optical device, an electronic device, a method of manufacturing an electro-optical device, and an ejection control method for a droplet ejection device. Background technique [0002] There are inherent problems in prior art applications of drop ejection devices, such as inkjet devices, for ejecting droplets and attaching the droplets to a target material. The problem is that the viscosity of the liquid ejected by the droplet ejection device changes. Changes in the viscosity of the liquid are caused by changes in ambient temperature, evaporation of the liquid solvent, and other reasons. [0003] In order to solve the problem of liquid viscosity variation, it is known to control the flow rate in the ink passage by means of a PTC (Positive Temperature Coefficient) thermistor arranged in close contact with the head base (head base) having the ink passag...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B41J2/045B41J2/01B41J2/14B05C5/00B05C11/10B41J2/07G02B5/20H01L51/50H05B33/10
CPCB41J2/04586B41J2/04571B41J2/14153B41J2/04501
Inventor 小山实
Owner SEIKO EPSON CORP