| 摘要 |
A substrate device includes: a plurality of substrates stacked one on another including a substrate on which electronic components are mounted; and a coupling member connecting mechanically and electrically the two opposed substrates, and the coupling member includes: a plurality of core-less solder balls connecting mechanically and electrically the two opposed substrates; and a plurality of spacers configured to keep a clearance between the two opposed substrates wider than a mounting height of the electronic component between the substrates.
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