| 摘要 |
PROBLEM TO BE SOLVED: To reduce the production cost of a frame and a ring, which constitutes a package for optical communication by a method wherein a hollow round pipe is formed into a square pipe shape, the square pipe is cut in a prescribed length, and a holder insertion part and a ceramic board fitting part are formed in the cut pipe to produce the frame. SOLUTION: In the production process of a frame 3, first a hollow and long round pipe 21 with a circular section is prepared and is formed into a square pipe 22 with a quadrangular section by a cold strip method or the like, for example. The pipe 22 is cut in a prescribed size, a holder insertion part 4 for inserting a holder, a board fitting part 24 for mounting a ceramic board and the like are formed by processing in the cut pipe and the frame 3 is produced. As a result, the frame 3 constituting a package for optical communication can be produced at extremely low cost as compared to that in the case, where the frame 3 is produced by a conventional wire cutting method. Accordingly, the overall production cost of the package optical communication can be significantly reduced. |
