Patent ID: 7377625
Filing Date: 2008-05-27
Classification: B41J,Y10T

Abstract:
1. A method for producing an ink-jet recording head including a plurality of discharge ports for discharging ink, a plurality of ink passages communicating with the plurality of corresponding discharge ports, and an ink supply port supplying a liquid to the plurality of ink passages, the method comprising the steps of: preparing a silicon substrate; forming a heat storage layer on a first surface of the substrate; forming a plurality of through-holes communicating with the ink supply port through the heat storage layer; forming heating elements used for discharging the ink on the heat storage layer; forming a protective layer on the heating elements and the heat storage layer having the plurality of through-holes; forming a passage-forming member forming the plurality of discharge ports and the plurality of ink passages on the protective layer; forming the ink supply port communicating with a common liquid chamber on the silicon substrate by anisotropic etching from a second surface opposite to the first surface of the substrate; and removing a part of the protective layer using the heat storage layer including the through-holes as a mask to form a filter including the plurality of through-holes.