Patent ID: 8784591
Filing Date: 2014-07-22
Classification: B29C,B32B,B41J,H01L,Y10T

Abstract:
1. A process for producing a liquid ejection head, comprising: a provision step of providing a piezoelectric substrate, and a first support substrate and a second support substrate for supporting the piezoelectric substrate; a bonding step of bonding one surface of the first support substrate to one principal surface of two principal surfaces of the piezoelectric substrate; a groove forming step of forming a groove in the other principal surface of the two principal surfaces of the piezoelectric substrate; an electrode forming step of forming a first electrode on at least one surface of a lateral surface of the groove, a bottom surface of the groove and the other principal surface remaining after the groove is formed; a joining step of joining one surface of the second support substrate to the other principal surface of the piezoelectric substrate; and a separation step of separating the first support substrate from the piezoelectric substrate, wherein, in the provision step, a piezoelectric substrate other than the piezoelectric substrate joined to the second support substrate is further provided, and wherein the production process further comprises, after the separation step, a laminate forming step of bonding one surface of two principal surfaces of the other piezoelectric substrate to one surface of the first support substrate and joining the one principal surface of the piezoelectric substrate joined to the second support substrate to the other principal surface of the two principal surfaces of the other piezoelectric substrate to form a laminate in which the piezoelectric substrates are laminated, and a second separation step of separating the first support substrate from the laminate.