| 摘要 |
PROBLEM TO BE SOLVED: To provide a structure wherein an occupied area in a substrate can be reduced and assembly is easy. SOLUTION: Electrical connection between substrates 3, 4 is performed by using a flexible cable 5, and besides, the substrates 3, 4 are held in a face-to-face attitude by using a spacer 6. Since function regarding mechanical connection or relative positioning between the substrates 3, 4 and function regarding electrical connection between the substrates 3, 4 are isolated from each other, size (especially thickness) of the spacer 6 which performs the mechanical connection or the relative positioning can be miniaturized (thinned) as far as a necessary and minimum limit for relative positioning between the substrates 3, 4, and an occupied area of the spacer 6 in the substrates 3, 4 can be reduced. Since electrical connection between the substrates 3, 4 is performed by using the flexible cable 5, ensuring electrical connection in assembling processes is unnecessary, and the assembling processes can be facilitated.
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