| 摘要 |
PROBLEM TO BE SOLVED: To increase the reliability of the assembly of electronic equipment by efficiently providing an assured screwing operation and always absorbingly holding formation waste produced at the time of screwing. SOLUTION: In this female screw formation waste sucking screw having a head part 2 and a leg part 3 in which threads are formed, a coating material 9 containing microcapsules in which an sucking liquid with a proper viscosity is sealed is applied to the screw in an area at least 60% or more from the tip of the leg part 3 to absorbingly hold the formation waste 23 produced at the time of screwing to the leg part 3 so that the formation waste 23 does not fall. Thus, even if the screw is directly screwed into a prepared hole in a soft work while forming a female screw, the formation waste such as abrasive powder or peeled pieces does not fall, and is surely absorbingly held. Also, since the falling of the formation waste is eliminated, the waste does not fall on precision electronic components, such faults that an electronic equipment circuit is short-circuited can be eliminated, and it does not cause a fire. On the other hand, when the screw is extracted, also the falling of the formation waste can be eliminated. COPYRIGHT: (C)2004,JPO
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