Toyoda Gosei Co., Ltd.

Kabushiki Kaisha Toshiba

Stanley Electric Co., Ltd

Hiroko Tsukamoto

Hiroaki Oshio

Hisao Yamaguchi

Masakata Koseki

Hideki Mori

Kazuhiro Tamura

Toshimi Kamikawa

Atsushi Tsuzuki

Mahito Hamada

Tatsuichiro Maki

A light emitting device includes a resin case including a concave portion with a reflector portion surrounding a light emitting element, a first lead and a second lead that are formed of a metal, exposed at a bottom of the concave portion of the case, and disposed away from each other in a predetermined direction, and a resin sealing material filled in the concave portion. The first lead includes a light emitting element mounting portion, a first wire connection portion, a first bleed-out preventing notch, and an opposite notch. The second lead includes a protective device mounting portion, a second wire connection portion, and a second bleed-out preventing notch. The first lead and the second lead are arranged such that, in the predetermined direction, the light emitting element mounting portion is opposed to the second bleed-out preventing notch, the first wire connection portion is opposed to the protective device mounting portion, and the opposite notch is opposed to the second wire connection portion.

Light emitting device including bleed-out preventing notches

In an LED lamp, a copper film is first formed on a substrate by plating. A resist is then bonded onto the copper film so that shaped like a ring viewed from the whole of the LED lamp. A nickel and a gold film are formed on a portion of the copper film where the resist is not bonded. Next, an adhesive agent is applied onto a bottom of the lamp house so that the lamp house is bonded onto the substrate through the adhesive agent. A transparent epoxy resin is packed in the frame of the lamp house and hardened by heating to perform resin sealing. Since the resist is bonded onto the surface of copper having a large number of fine irregularities sufficient to ensure a large contact area and excellent in adhesion, separation can be prevented from being caused by thermal stress.

Led lamp including a resist bonded to a copper film

Growing community of inventors

Aichi-ken, Japan

Hiroko Tsukamoto