| 摘要 |
PURPOSE:To form a desired gap with good accuracy even with blocks of multiple pieces-molded or long ferrite cores by sandwiching a curved spring material which does not lose a spring characteristic at the bonding temp. between the adjacent blocks and pressurizing both ends. CONSTITUTION:SiO2 films 4 which are respectively adjusted to meet an optional gap length and glass 5 for improving an adhesive effect are formed by sputtering to several hundred angstrom thickness onto the ferrite blocks 1, 1' forming the gap in order to form the gap, then the blocks are set to butting jigs 11 made of alumina. The spring material which does not lose the spring characteristic at the bonding temp. and is preliminarily curved to a specified shape, for example, zirconia plate 10 is set and the butted blocks 1, 1' are set. A required number, for example, 10 pieces of the blocks are set and, for example, 9 pieces of the zirconia plates 10 are sandwiched therebetween. Dummies 6, 6' of ceramics are placed at both ends of the blocks 1, 1' and the zirconia plates 10 are sandwiched therebetween as well and are pressurized at one point.
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