Light-emitting thyristor, light-emitting thyristor array, exposure head, and image forming apparatus

Abstract

A light-emitting thyristor includes a layered structure having a semiconductor DBR layer, a first semiconductor layer of a first conductivity type, a second semiconductor layer of a second conductive type, a third semiconductor layer, and a fourth semiconductor layer of the second conductivity type in this order on a semiconductor substrate, the third semiconductor layer has at least one fifth semiconductor layer of the first conductivity type and a multi-quantum well structure, the fifth semiconductor layer is present between the second semiconductor layer and the multi-quantum well structure, the multi-quantum well structure is formed of barrier layers and quantum well layers, and the number of the quantum well layers is greater than or equal to 10.

Dependencies are inferred from the claim text.