Patent ID: 8729569
Filing Date: 2014-05-20
Classification: B41J,H01L

Abstract:
1. A light-emitting chip comprising: a substrate; a first stacked-semiconductor layer and a second stacked-semiconductor layer that each are separated by trenching at least 4 semiconductor layers stacked on the substrate, the at least 4 semiconductor layers having different conductivity types and including the substrate; wherein a plurality of light-emitting thyristors that each have a pnpn structure are formed of the first stacked-semiconductor layer; a lower wiring that is formed of the second stacked-semiconductor layer, the second stacked-semiconductor layer consisting of the lower 3 semiconductor layers of the at least 4 semiconductor layers and an electrode that is made of a material being in ohmic contact with an uppermost semiconductor layer of the second stacked-semiconductor layer, the electrode being provided on the uppermost semiconductor layer, a voltage having a fixed potential is applied to the semiconductor layer so that any one of p-n junctions between the substrate and the uppermost semiconductor layer is reversely biased with respect to potentials respectively applied to the substrate and the uppermost semiconductor layer; and an upper wiring that is provided on the lower wiring so as to intersect with the lower wiring through an isolation layer, wherein the voltage having a fixed potential is applied to the semiconductor layer between the substrate and the uppermost semiconductor layer in the second stacked-semiconductor layer of the lower wiring by stacking a first metallic layer made of a material being in ohmic contact with one of the semiconductor layers having the different conductivity types and also being in direct contact with a second metallic layer made of a material being in ohmic contact with the other one of the semiconductor layers so that the first metallic layer extends to the second metallic layer.