| 摘要 |
PROBLEM TO BE SOLVED: To form a thin film for damping having stable quality on a sub-dome, in a diaphragm for a dynamic microphone having a center dome and the sub-dome. SOLUTION: The diaphragm 1 having the center dome 10 and the sub-dome 20 is temporarily fixed on a rotating base 40. An ultraviolet-curing resin 50 containing no volatile component is continuously applied like a streak over the entire circumference of the inner circumferential edge 20a of the sub-dome 20, and the resin 50 is allowed to naturally flow down along the curved surface of the sub-dome 20 without allowing a centrifugal force to work so that the resin 50 may fit in the dome surface. The rotating base 40 is rotated to expand the resin 50 by its centrifugal force toward an outer circumferential edge 20b side of the sub-dome 20 so that the resin 50 is made into a thin film. Then, the resin 50 is irradiated with an ultraviolet ray so as to be cured, and a thin film 50a for damping is formed. COPYRIGHT: (C)2005,JPO&NCIPI |
