| 摘要 |
PROBLEM TO BE SOLVED: To check the suction of a liquid synthetic resin caused by capillarity into a space between the underside of a frame plate and the upper surface of a printed board by providing a groove in the underside of the frame plate extending along the entire inner periphery of an opening. SOLUTION: An opening 14 through which various electronic components 12 are set is formed in a frame plate 13, and a groove 13a is arranged in the underside of the plate 11, the groove 13a extending along the entire inner peripheral surface of the opening 14. Therefore, until a liquid synthetic resin charged into the opening 14 in the plate 13 is cured, the grove 13a stops the suction by capillarity of part of the synthetic resin into a space between the underside of the plate 13 and the upper surface of a printed board 11 from the entire periphery of the opening 14 by exposing the synthetic resin to the atmosphere, and hence such absorption can be reliably checked. As a result, it does not occur that the frame body cannot be separated after packaging, and the shape after packaging can be stabilized.
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