| 摘要 |
PROBLEM TO BE SOLVED: To solve the problem that a conventional contact probe pin gives damage to an element to be measured like a solder ball since the same pressure is applied to two objects having different hardnesses. SOLUTION: The solder ball 8 is pressed by a first plunger 1, brought into contact with the plunger 1, and electrically connected to the pad 10 on a test board 9 via a first spring 3 having a internal spring constant set to a small value, a separating part 6 fixed to a barrel 5, a second spring 4 having a large spring constant, and a second plunger 2. The first and the second springs 3 and 4 are separated so as not to affect each other by the part 6. Further, the barrel 5 is assembled in a socket base 11 and mounted on the board 9. COPYRIGHT: (C)2004,JPO
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