| 摘要 |
PROBLEM TO BE SOLVED: To weld an ultrasonic vibrator and a front member, and the ultrasonic vibrator and a signal line together at a high yield so as to attain an array-type ultrasonic probe of 300°C or higher for the temperature of the resistance to heat. SOLUTION: Ultrasonic vibrators 1 previously cut in stripes are welded with Zn-Al solder alloy 3 at fusion point of 382°C, and signal lines 5 are welded to the plurality of ultrasonic vibrators 1 with Sn-based lead-free solder 4 including a metallic ball which has a fusion point lower than that of the solder alloy 3. Consequently, welding can be completed at a temperature lower than conventional brazing temperature, influence due to thermal distortions is minimized, and the connections of the signal lines are made at a lower temperature, to improve the yield of the welding of the array type probe. COPYRIGHT: (C)2008,JPO&INPIT
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