Nichia Corporation

Kensaku Hamada

Takanori Akaishi

Saiki Yamamoto

Yasuo Kato

Morito Kanada

Yuichi Hamada

A light-emitting device includes a light emitting element having a pad electrode, and a metal member connected to the pad electrode via a wire. The wire has a layered structure including at least a core material containing copper as a main component, an intermediate layer containing palladium as a main component, and a surface layer containing silver as a main component. The intermediate layer is arranged between the core material and the surface layer.

Light-emitting device

A light emitting device includes an electrically conductive member, a light emitting element, a wire, and a sealing member. The wire contains gold and silver and connects the electrically conductive member and the light emitting element. The wire includes a ball portion and a recrystallized region. The ball portion is provided on an electrode of the light emitting element. The recrystallized region is provided on the ball portion and has a length in a range of 50 &#x3bc;m to 90 &#x3bc;m. The sealing member has a lower surface and an upper surface opposite to the lower surface and covers the light emitting element and the wire so that the lower surface faces the electrically conductive member and the light emitting element and so that a distance from a top of the ball portion to the upper surface of the sealing member is 90 &#x3bc;m to 230 &#x3bc;m.

Light emitting device

A light emitting device includes a plurality of light emitting elements, a plurality of lead frames, and a package. The light emitting elements are mounted on the lead frames. The package is made of resin. The package has an opening. A part of the lead frames is embedded in an inner portion of the package and another part of the lead frames is exposed on a bottom surface of the opening. A resin bottom surface on which the resin is exposed is provided on the bottom surface of the opening of the package. The package includes a wall portion projecting from the bottom surface of the opening between the light emitting elements in the opening. The light emitting elements are connected by wire that straddles the wall portion.

Growing community of inventors

Komatsushima, Japan

Kensaku Hamada