Patent ID: 9333751
Filing Date: 2016-05-10
CPC Classification: B41J,Y10T

Claim Text:
1. A manufacturing method of an inkjet head, comprising: forming an electrode part, in which an electrode having an average surface roughness of a first thickness length is formed on an inner surface of a groove part formed in a substrate of the inkjet head, a smoothed film made of an inorganic material and having an average surface roughness of the first thickness length is formed on a surface of the electrode, and then, an electrode protection film having a thickness of a second thickness length is formed on a surface of the smoothed film, the first thickness length being less than the second thickness length; bonding a nozzle plate to an opening end face of a pressure chamber in the groove part with an adhesive after the electrode part is formed; and forming, in the nozzle plate, a nozzle communicating with the pressure chamber by laser machining after the nozzle plate is bonded.