SEMICONDUCTOR LUMINOUS ELEMENTS AND MANUFACTURE THEREOF

摘要

PURPOSE:To improve the efficiency of the photoconnection to the photofiber with small core diameter by a method wherein the current is concentrated by the first semiconductor crystal layer utilizing the hetero connection as the luminous junction. CONSTITUTION:The second conductive type semiconductor crystal layer 32 excluding the central part thereof is laminated on the first conductive type semiconductor substrate crystal 31. The first conductive type second semiconductor crystal layer 33 is laminated on the first semiconductor crystal layer 32 and the surface of the central part of the substrate crystal 31. These multilayered semiconductor crystal layers are internally provided with the luminous junction 37. The peripheral surface of these multilayered semiconductor crystal layers is coated with the ohmic electrode 35. The current is concentrated by the first semiconductor crystal layer 32 making the luminous region 37 narrower. Furthermore the forbidden band width of the upper semiconductor crystal is made wider than that of the lower semiconductor crystal by means of utilizing the hetero connection as the luminous junction. Consequently the light from the luminous region 37 may be fetched upward.