Ink-jet head and its manufacture method

Abstract

An ink jet head is formed of a nozzle material composed of a condensation product comprising a hydrolysable silane compound having a fluorine-containing group and a photo-polymerizable resin composition.

1 - 21 . (canceled) 
     
     
         22 . A method of manufacturing an ink jet head including a member provided with an ejection opening for ejecting ink, the method comprising:
 applying a material comprising a condensation product comprising a hydrolysable silane compound having a fluorine-containing group and a photo-polymerizable resin composition for forming the member on a substrate; and   forming the ejection opening by exposing the material and removing an unexposed portion of the material.   
     
     
         23 . A method of manufacturing an ink jet head including a member provided with an ejection opening for ejecting ink and an ink passage communicating with the ejection opening, the method comprising:
 providing a pattern of the ink passage on a substrate provided with an ejection pressure generating element for ejecting ink;   providing a coating layer comprising a condensation product comprising a hydrolysable silane compound having a fluorine-containing group and a photo-polymerizable resin composition for forming the member on the pattern;   forming an opening by exposing the coating layer and removing an unexposed portion of the coating layer; and   removing the pattern to form the passage.   
     
     
         24 . A method of manufacturing an ink jet head according to  claim 22 ,
 wherein after the ejection opening formation, a curing reaction is promoted with light or thermal energy.   
     
     
         25 . A method of manufacturing an ink jet head according to  claim 24 , wherein the nozzle material is applied two or more times on the substrate. 
     
     
         26 . A method of manufacturing an ink jet head according to  claim 22 , wherein the photo-polymerizable resin composition is a cationically photo-polymerizable resin composition. 
     
     
         27 . A method of manufacturing an ink jet head according to  claim 26 , wherein the cationically photo-polymerizable resin composition contains an epoxy compound. 
     
     
         28 . A method of manufacturing an ink jet head according to  claim 27 , wherein the cationically photo-polymerizable resin composition comprises an epoxy compound that is solid state at room temperature. 
     
     
         29 . A method of manufacturing an ink jet head according to  claim 22 , wherein the condensation product further comprises a hydrolysable silane compound having no fluorine-containing group. 
     
     
         30 . A method of manufacturing an ink jet head according to  claim 29 , wherein the hydrolysable silane compound having no fluorine-containing group is a hydrolysable silane compound having a photo-polymerizable group. 
     
     
         31 . A method of manufacturing an ink jet head according to  claim 30 , wherein the hydrolysable silane compound having a photo-polymerizable group is a hydrolysable silane compound having a cationic polymerization group. 
     
     
         32 . A method of manufacturing an ink jet head according to  claim 30 , wherein the hydrolysable silane compound having a photo-polymerizable group is a hydrolysable silane compound having an epoxy group. 
     
     
         33 . A method of manufacturing an ink jet head according to  claim 29 , wherein the hydrolysable silane compound having no fluorine-containing group is selected from a silane having at least one alkyl substituent, a silane having at least one aryl substituent or a silane having no non-hydrolysable substituent. 
     
     
         34 . A method of manufacturing an ink jet head according to  claim 22 , wherein the condensation product comprises a hydrolysable silane compound having a fluorine-containing group, a hydrolysable silane compound having a photo-polymerizable group, and a hydrolysable silane compound selected from a silane having at least one alkyl substituent, a silane having at least one aryl substituent or a silane having no non-hydrolysable substituent. 
     
     
         35 . A method of manufacturing an ink jet head according to  claim 22 , wherein the hydrolysable silane compound having a fluorine-containing group is represented by general formula (1):
   R f Si(R) b X( 3-b )  (1)   wherein R f  is a non-hydrolysable substituent having 1 to 30 fluorine atoms bonded to a carbon atom, R is a non-hydrolysable substituent, X is a hydrolysable substituent, and b is an integer from 0 to 2.   
     
     
         36 . A method of manufacturing an ink jet head according to  claim 35 , wherein the non-hydrolysable substituent R f  has at least 5 fluorine atoms bonded to a carbon atom. 
     
     
         37 . A method of manufacturing an ink jet head according to  claim 35 , wherein the condensation product comprises at least two hydrolysable silane compounds having a fluorine-containing group, the silane compounds having a different number of fluorine atoms contained therein. 
     
     
         38 . A method of manufacturing an ink jet head according to  claim 31 , wherein the hydrolysable silane compound having a cationic polymerizable group is represented by general formula (2):
   R c Si(R) b X( 3-b )  (2)   wherein R c  is a non-hydrolysable substituent having a cationic polymerizable group, R is a non-hydrolysable substituent, X is a hydrolysable substituent, and b is an integer from 0 to 2.   
     
     
         39 . A method of manufacturing an ink jet head according to  claim 33 , wherein the hydrolysable silane compound selected from a silane having at least one alkyl substituent, a silane having at least one aryl substituent or a silane having no non-hydrolysable substituent is represented by general formula (3):
   R a SiX( 4-a )  (3)   wherein R is a non-hydrolysable substituent selected from substituted or unsubstituted alkyl groups and substituted or unsubstituted aryl groups, X is a hydrolysable substituent, and a is an integer from 0 to 3.   
     
     
         40 . A method of manufacturing an ink jet head according to  claim 22 , wherein the hydrolysable silane compound having a fluorine-containing group is represented by formula (4):
   CF 3 (CF 2 ) n —Z—SiX 3   (4)   wherein X is a hydrolysable substituent and preferably is methoxy or ethoxy, Z is a divalent organic group, and n is an integer from 0 to 20.