Improved liquid discharge head, cartridge having such head, liquid discharge apparatus provided with such cartridge, and method for manufacturing liquid discharge heads

摘要

An ink jet head comprises a head substrate provided with a plurality of ink paths, pressure generating elements each arranged for each of the paths; and an orifice plate provided with ink discharge openings each communicated with each of the ink paths. Then, the bonding surface side of the orifice plate to the substrate is provided at least with the surface treatment. The orifice plate is formed by fluororesin or resin containing fluorine. With the structure thus arranged, it becomes possible to bond the orifice plate having ink repellency to the head substrate firmly and assuredly, while enabling the ink jet head thus manufactured to maintain a good ink repellency for a long time.