Stanley Electric Co., Ltd

Shogo Kirai

Takayoshi Yamane

Chizu Saito

Hironobu Sakamoto

A semiconductor light-emitting device includes a first bonding pattern made of metal that is formed on a substrate, and a second bonding pattern provided in a base portion and a flange portion of a dome-shaped transparent body. The first and second bonding patterns are bonded to each other via solder, to seal a space in a convex lid portion. The first and second bonding patterns have rectangular ring shapes that surround the semiconductor light-emitting element when viewed from above, at least edges on inner peripheral sides of corner portions thereof are positioned on outer sides of outer peripheral edges of an annular base portion of the convex lid portion, and edges on inner peripheral sides of straight-line portions sandwiched between the corner portions are positioned closer to the semiconductor light-emitting element than the outer peripheral edge of the annular base portion of the convex lid portion.

Semiconductor light-emitting device, and water disinfection device

The present invention is directed to reduction of angle dependence of chromaticity in a phosphor layer, without using a light scattering agent, the phosphor layer being made up of phosphor particles adhered tightly to one another via a binder according to the spray coating method. The phosphor layer contains phosphor particles laid along the top surface of the light emitting element and the binder embedded into a gap between the phosphor particles, and the phosphor layer does not contain the light scattering agent. The area of a region on the upper surface of the phosphor layer is between or equal to 3% and 10% with respect to the area of the top surface of the light emitting element, the region being positioned at the gap between the phosphor particles and allowing the light being outputted to pass through the binder and directly reach the upper surface of the phosphor layer. This configuration makes the asperities smaller on the surface of the phosphor layer and reduces the angular dependence of chromaticity.

Growing community of inventors

Kanagawa, Japan

Shogo Kirai