| 摘要 |
PROBLEM TO BE SOLVED: To manufacture a multicore ferrule with electrocasting, which has high accuracy of a submicron order required for the pore size and position, and in which the holes are required in the positions of even three or more lines, in a process of manufacturing the multicore ferrule. SOLUTION: This method comprises setting up an electroconductive sheet having many open holes in precise positions by a photoresist method or the like, threading wires of a bad conductor like plastics or glass with precise thickness through the hole, increasing the thickness of electroconductive thin sheet by electrocasting on the metal sheet of a cathode in the state that wires are pulled, then removing the wires, and machining to turn the holes into a predetermined dimension.
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