| 摘要 |
<p>PURPOSE:An indentation is formed on the insulating substrate which has electric wiring thereon; a light emitting element is arranged inside the indentation so that the end of the former is exposed from the opening surface of the latter; and also a light receiving device is provided in such a way as to face the light emitting element - thereby obtaining a photo-coupling array that has an excellent lighttransmitting effect.</p> |
