METHOD OF MANUFACTURING NEEDLE-SHAPED BODY, NEEDLE-SHAPED BODY AND NEEDLE-SHAPED BODY HOLDING SHEET

摘要

PPROBLEM TO BE SOLVED: To provide a method for reproducibly and accurately manufacturing a biocompatible needle-shaped body for treatment for directly injecting medical agent to an affected area. PSOLUTION: A mold 21 for molding the needle-shaped body is provided with a micropore 21a which is a reversal transcription of the shape of a needle-shaped body of a master mold which is formed by transcription of the master mold in reverse formed by a plurality of etching steps and is filled with a fused biocompatible material. After solidification of the biocompatible material, the mold 21 for molding the needle-shaped body is removed. In this way, a biosoluble needle-shaped body 22b having an end part which is tapered toward its tip and a support rod portion which continues into the end part and has the same diameter over its length or has the diameter gradually reduced in the length direction is manufactured. When the master mold is etched, the support rod in any fine shape is formed by the Bosch process. The end part can be sharpened by repeating forming and removing of silicon oxide films. PCOPYRIGHT: (C)2011,JPO&INPIT