Citizen Electronics Co., Ltd.

Citizen Watch Company, Ltd.

Citizen Holdings Company, Ltd.

Kazuki Matsumura

Masahiro Watanabe

Shingo Kuriki

Sadato Imai

Takashi Iino

Tatsuya Katoh

Nodoka Oyamada

Yuji Omori

Koki Hirasawa

Light emitting diode

Provided is a light-emitting device and a method for manufacturing the same which avoid a distinct color unevenness during the light emission even if variations are present among the light-emitting elements in the concentration of the phosphor that precipitates in the resin for sealing the light-emitting elements. The light-emitting device includes a substrate, a plurality of light-emitting elements that are mounted on the substrate, a first resin layer that integrally seals the light-emitting elements and includes a first phosphor that is excited by light from the light-emitting elements at a concentration that is high as it goes to a lower end near the substrate from an upper end distant from the substrate, and a second resin layer that is provided at an upper side of the first resin layer and includes a second phosphor that is excited by light from the light-emitting elements at a uniform concentration.

Light-emitting device and method for manufacturing same

A semiconductor device directly joins electrodes of a semiconductor element to electrodes of a metal substrate and has good yield, connection reliability, good mass productivity, and superior heat dissipation efficiency. A method for producing the semiconductor device that directly joins the electrodes of the metal substrate to the electrodes of the semiconductor element includes forming an electrode separating groove in an element mounting position on a main surface of the metal substrate at a predetermined depth. The semiconductor element is mounted to extend over the electrode separating groove. The metal substrate is ground from a surface reverse to the main surface of the metal substrate up to a position reaching the electrode separating groove.

Semiconductor device and method for producing the same

Light-emitting diode

Growing community of inventors

Fuefuki, Japan

Kazuki Matsumura