Method of manufacturing an ink jet print head

A method of manufacturing an ink jet print head comprising:

• a first step for forming on a silicon monocrystailine substrate a first etching pattern to be pressure generating chambers and a second etching pattern located in opposition to said first etching pattern with respect to ink supply ports, said second etching pattern being narrower than said first etching pattern and located within opposite lines defining said first etching pattern;
• a second step for anisotropically etching said silicon monocrystailline substrate from a first face thereof on which said first and second etching patterns are formed to a second face thereof, wherein the second face is opposite to the first face;
• and
• a third step for anisotropically etching areas of said silicon monocrystalline substrate, each of the etching areas being located between said first and second etching patterns, to a depth suitable for said ink supply ports.