Patent ID: 8742431
Filing Date: 2014-06-03
Classification: H01L,H03K

Abstract:
1. A photo-coupler device, comprising: a p-type substrate; a p-type epitaxial layer, deposited on the p-type substrate, and comprising two conducting regions and a plurality of N+ electrode regions disposed between the two conducting regions; an insulation layer, deposited on the p-type epitaxial layer; a plurality of shielding layers comprising first shielding layers and second shielding layers, deposited in the insulation layer in parallel in a horizontal direction, and the first shielding layers being correspondingly arranged for covering the two conducting regions, the second shielding layers being correspondingly arranged for covering at least one of the N+ electrode regions; a metal layer, made of Ag and deposited on the insulation layer; and a passivation layer, deposited on the metal layer; wherein, the covered ones of the N+ electrode regions are connected to a low-signal transmission contact, the N+ electrode regions which are not covered by the second shielding layers are connected to a high-signal transmission contact, and the metal layer, the two conducting regions, and the first shielding layers covering the two conducting regions are connected to a low potential contact.