Patent ID: 6364455
Filing Date: 2002-04-02
Classification: B41J

Abstract:
A printhead of an ink jet printing apparatus comprising:a micro-control apparatus formed with a plurality of ejecting elements; a first layer of film formed over said micro-control apparatus, an ink chamber being formed in the first layer of film relative to each of said a plurality of ejecting elements; a second layer of photosensitive film formed on said first layer of film, an ink orifice being formed in the second layer of film relative to said ink chamber in the first layer of film by photolithography (exposure and development); a third layer of photosensitive film formed on said second layer of high-molecular photosensitive film for protecting said second layer of photosensitive film, an ink orifice being formed at the same time in said second layer and said third layer of photosensitive film relative to each of said plurality of ink chambers in the first layer of film by photolithography (exposure and development); a signal input means, one end of the signal input means being connected to the signal output terminal of said printing apparatus and the other end being connected to said micro-control apparatus, thereby, said ink chamber in said first layer film and its corresponding ink orifice in the second layer of photosensitive film cooperatively form an ink reservoir and a dot of ink can be ejected from the ink reservoir by a corresponding one of said a plurality of ejecting element.