Why is it so difficult to localize piezoelectric inkjet print heads?

Lack of technology. Due to the lack of independent patent technology for domestic inkjet printheads, it is difficult to localize them, and domestic enterprises have no initiative in the printer market. The high price of inkjet print head products from foreign manufacturers directly affects the profit rate of domestic printers. Electric ink-jet printing is to place many tiny piezoelectric ceramics near the nozzle of the print head, and use the principle that ink is deformed under the action of voltage to make the ink jet from the nozzle, thus forming a pattern on the printing medium.