Piezoelectric ink jet printing head and its producing method

Abstract

The piezoelectric ink jet printing head has one notched metal layer to replace normal ceramic vibrating layer and ink cavity layer to avoid the stress destruction caused by high temperature sintering. The producing electroplating and micro-etching process includes forming one notched metal layer on a substrate, removing the substrate, forming the lower electrode layer and one figured piezoelectric layer, forming the upper electrode layer, adhering one jet hole sheet to the second surface of the metal layer to constitute one ink cavity together with the notch.

Description

technical field [0001] The invention relates to a piezoelectric inkjet printing head and its manufacturing method, in particular to a metal layer with grooves instead of the known ceramic thick film to form the vibration layer and ink of the piezoelectric inkjet printing head. The structure of the cavity layer and its manufacturing method. Background technique [0002] The main working principles of traditional inkjet printing technology can be divided into thermal bubble type and piezoelectric type. Thermal bubble jet printing technology uses a heater to vaporize the ink instantly, and generates high-pressure bubbles to push the ink out of the nozzle. Due to the low manufacturing cost of the thermal bubble inkjet print head, it has been successfully commercialized by HP and CANON, and has formed a considerable inkjet printer market. However, due to its working principle of high-temperature gasification, the selectivity of applicable inks (mainly water-based solvents) is l...

AI Technical Summary

Problems solved by technology

[0008] (2) Since the structure of the piezoelectric inkjet print head is quite complicated, the shrinkage of the ceramic material is often uneven during high-temperature sintering, resulting in stress damage to the internal structure, thereby relatively increasing the failure rate of the finished product;

[0009] (3) Since the structure of the piezoelectric inkjet print head is quite complicated, the shrinkage of the ceramic material will be uneven during sintering at high temperature, which will lead to a piezoelectric inkjet print head with a denser structural design, and the qualified rate of the finished product The lower, thus unable to increase the density between inkjet printheads, and limit the resolution of inkjet printing

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