NEEDLE AND METHOD FOR MANUFACTURING THE SAME

摘要

A method for manufacturing a needle tapered along the longitudinal direction by electroforming comprises: a step of immersing a core material (122) having an outer peripheral surface that is tapered along the longitudinal direction in an electrolyte and forming a first electroformed body (126) on an outer peripheral surface (124) of the core material (122); a step of immersing the first electroformed body (126) in an electrolyte to which particles having a prescribed particle size are added and forming a second electroformed body (134) having multiple protrusions (30) on an outer peripheral surface (128) of the first electroformed body (126); a step of cutting the first electroformed body (126) and second electroformed body (134) into a prescribed length and forming a needle (10) having a sharp needle tip (16); and a step of pulling out the core material (122) from the cut first electroformed body (126).

主权项

1. A needle comprising a needle tube formed by electroforming and having a tapered shape along a longitudinal direction, the needle tube being provided with a plurality of projections formed by electroforming on an external peripheral surface of the needle tube, the projections having intervals of 0.2 to 100 μm between adjacent top portions thereof, and a height of 0.1 to 50 μm from the external peripheral surface.