NOZZLE PLATE PRODUCTION METHOD, NOZZLE PLATE, AND FLUID DISCHARGE HEAD

    公开(公告)号:EP4316855A1

    公开(公告)日:2024-02-07

    申请号:EP21934870.3

    申请日:2021-03-31

    摘要: A nozzle plate having at least a nozzle tapered portion 12 and a straight communication passage 13 in a nozzle hole is manufactured through the following steps 1 to 5. Step 1 (S-1): a step of preparing a single crystal silicon substrate 1 whose surface has a crystal orientation of a [100] plane. Step 2 (S-2): a step of uniformly forming a mask layer 2 on the surface of the single crystal silicon substrate. Step 3 (S-3): a step of forming an opening pattern 3 in the mask layer. Step 4 (S-4): a step of forming a through hole 4 by penetrating the single crystal silicon substrate located below the opening pattern from the surface by dry etching. Step 5 (S-5): a step of forming a nozzle tapered portion and a straight communication passage continuous with the nozzle tapered portion by enlarging the through hole by anisotropic wet etching on the single crystal silicon substrate.