| 摘要 |
<p>A PHOTO COUPLER A photo coupler comprising a multilayer insulating substrate having a cavity in a predetermined portion, a first conductive layer at the bottom of the cavity, a second conductive layer on one surface of the insulating substrate, a light emitting diode located in the cavity with a substantial part of the light emitting zone thereof being within the cavity, the diode being electrically connected to the first conductive layer, a photo responsive device located above the cavity on the substrate with the photo sensitive surface of the device facing the light emitting diode and being electrically connected to the second conductive layer.</p> |
