Electrostatic suction-type fluid discharging method and device

Abstract

The discharge hole diameter of the nozzle is 0.01 to 25 μm, and the upper limit voltage (10) set to be greater than or equal to the minimum dischargeable voltage (30) as a voltage condition for starting fluid discharge is applied between the nozzle and the substrate by a voltage applying unit the pulse voltage. Before the rising edge of the pulse voltage, set the first lower limit voltage (20a) whose polarity is the same as the upper limit voltage (10) and whose absolute value is smaller than the lowest dischargeable voltage (30), and immediately after the rising edge of the pulse voltage, set A second lower limit voltage (20b) having a polarity opposite to the upper limit voltage (10). Therefore, it is possible to provide an electrostatic attraction type fluid discharge method and device, which can achieve miniaturization of nozzles, discharge of tiny fluids, high accuracy of impact position, and low voltage of driving voltage, while improving discharge start-stop characteristics and driving frequency. And it can control the pulse time of the discharge volume.

Description

technical field [0001] The present invention relates to an electrostatic attraction type fluid discharge method and device thereof, in which a fluid such as ink is charged and electrostatically attracted to discharge the fluid onto an object such as a substrate. Background technique [0002] Among the fluid ejection methods for discharging fluid such as ink onto an object (recording medium), there are generally piezoelectric methods and thermal methods that are put into practical use as inkjet printers, but there are other methods that make the discharged fluid Conductive fluid and apply an electric field to the conductive fluid to make it discharge from the nozzle hole (ink ejection hole, ejection hole) of the nozzle. [0003] As a fluid discharge device of this electrostatic attraction type (hereinafter referred to as an electrostatic attraction type fluid discharge device), for example, in Japanese Patent Publication "Patent Publication No. Sho 36-13768 (announcement date...

AI Technical Summary

Problems solved by technology

[0024] To sum up, in the existing fluid ejection device, there is a problem of nozzle miniaturization and high precision, and it is difficult to realize both at the same time.

Especially in the electrostatic attraction type fluid discharge device, it is considered that there is a problem that both the miniaturization of the nozzle and the reduction of the driving voltage are not compatible.

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