Patent ID: 6767473
Filing Date: 2004-07-27
Classification: B05C,B41J,H01L,Y10T

Abstract:
A process for producing a plurality of fine nozzles, formed of silicon oxide, protruded from one surface of a silicon substrate and in communication with fine holes which extend through the silicon substrate and have a silicon oxide layer on the wall surface thereof, said process comprising:a first step of providing a silicon substrate having on its whole surface a silicon nitride layer and forming a mask pattern having a plurality of fine openings on the silicon nitride layer in its portion located on one surface of the silicon substrate; a second step of forming through fine holes in the silicon substrate by deep etching using the mask pattern as a mask; a third step of removing the mask pattern and oxidizing the inside of the through fine holes of the silicon substrate to form a silicon oxide layer; and a fourth step of removing a part of the silicon nitride layer and a part of the silicon substrate from one surface of the silicon substrate by dry etching to expose the silicon oxide layer by a predetermined length, thereby forming fine nozzles.