Abstract: According to one embodiment, a semiconductor light emitting device having a base, a mounting material and a chip of a semiconductor light emitting element is provided. The mounting material is provided on the base. The chip of the semiconductor light emitting element is fixed onto the base via the mounting material. The chip of the semiconductor light emitting element is provided with a sapphire substrate, an active region, a light shielding portion and anode and cathode electrodes for supplying an electric power to the active region. The active region is provided on the sapphire substrate and has a light emitting layer for emitting light by supplying electric power. The light shielding portion is formed on the sapphire substrate on the side of the mounting material. The light shielding portion prevents the mounting material from being irradiated with the light produced in the light emitting layer.

Abstract: According to one embodiment, a semiconductor light emitting device having a base, a mounting material and a chip of a semiconductor light emitting element is provided. The mounting material is provided on the base. The chip of the semiconductor light emitting element is fixed onto the base via the mounting material. The chip of the semiconductor light emitting element is provided with a sapphire substrate, an active region, a light shielding portion and anode and cathode electrodes for supplying an electric power to the active region. The active region is provided on the sapphire substrate and has a light emitting layer for emitting light by supplying electric power. The light shielding portion is formed on the sapphire substrate on the side of the mounting material. The light shielding portion prevents the mounting material from being irradiated with the light produced in the light emitting layer.

Abstract: A compound semiconductor device includes a laminated body including a crystal substrate and a compound semiconductor multilayer film. The laminated body has a major surface, a first side face, a second side face, a third side face, and a fourth side face. The first and the second side faces are opposed to each other, substantially perpendicular to the major surface of the laminated body, made of cleaved surfaces. The third and the fourth side faces are perpendicular to the major surface and to the first and the second side faces, opposed to each other, and made of uncleaved surfaces. A groove is provided on the third side face, and the groove has a depth varied with position as viewed from the major surface, and has ends not reaching the first and second side face.

Abstract: A light emitting apparatus includes: a light emitting element including a laminated body, an electrode provided on the laminated body, and a pad electrode provided on the electrode, the laminated body including a semiconductor light emitting layer; a mounting member having a metal bonding layer; and an alloy solder containing gold for bonding the pad electrode to the metal bonding layer. The pad electrode has at least a first gold layer provided on the electrode and being thicker than the electrode and a first metal barrier layer provided on the first gold layer, and the melting point of the alloy solder is lower than the melting point of alloys with elements constituting the first metal barrier layer and the alloy solder.

Abstract: A compound semiconductor device includes a laminated body including a crystal substrate and a compound semiconductor multilayer film. The laminated body has a major surface, a first side face, a second side face, a third side face, and a fourth side face. The first and the second side faces are opposed to each other, substantially perpendicular to the major surface of the laminated body, made of cleaved surfaces. The third and the fourth side faces are perpendicular to the major surface and to the first and the second side faces, opposed to each other, and made of uncleaved surfaces. A groove is provided on the third side face, and the groove has a depth varied with position as viewed from the major surface, and has ends not reaching the first and second side face.