Patent ID: 9555632
Date: 2017-01-31
CPC Classifications: B41J,H01L

Claim:
1. A method of processing a silicon substrate, comprising forming a supply path in a silicon substrate having a first surface and a second surface on an opposite side of the first surface, the supply path penetrating the silicon substrate and including a beam configured to connect opposed sides of the supply path to each other, the method further comprising: a non-through hole forming step of partitioning, for each beam, a region of the second surface in which the supply path is to be formed, into a first region that corresponds to a forming position of the beam, a second region that is adjacent to the first region on both sides of the first region, and a third region that is none of the first region and the second region, and forming a plurality of non-through holes, which are prevented from penetrating the silicon substrate, in the second region and the third region with a predetermined depth from the second surface; and an etching step of subjecting the silicon substrate having the plurality of non-through holes formed therein, to anisotropic etching from the second surface, to thereby form the supply path and the beam in the supply path, the non-through hole forming step comprising causing at least one of an interval or a depth of each of the plurality of non-through holes to differ in the second region and the third region.