Patent ID: 8034247
Filing Date: 2011-10-11
Classification: B41J

Abstract:
1. A manufacturing method of a silicon nozzle plate, wherein nozzle holes are formed by etching a silicon substrate, comprising: forming a film to provide the film representing an etching mask for etching the silicon substrate on a surface of the silicon substrate; forming a pattern film by partially removing the film based on a nozzle hole forming pattern and an outer shape forming pattern; etching the silicon substrate to form nozzle holes to penetrate through the silicon substrate based on the nozzle hole forming pattern representing the etching mask, and to form groove sections of the outer shape forming pattern having a half etching portion at least in a part of the silicon substrate based on the outer shape forming pattern; and separating the silicon substrate by cleaving along the half etching portion; wherein the outer shape forming pattern includes a first pattern having a predetermined first pattern width and a second pattern having a second pattern width which is narrower than the predetermined first pattern width; and wherein the second pattern width is narrower than a diameter of the nozzle hole; and wherein the half etching portion and the nozzle hole that penetrates through the silicon substrate are formed together in the same etching step.