Sharp Kabushiki Kaisha Corporation

Fuji Machinery Mfg. & Electronics Co., Ltd.

Tomio Wakamatsu

Masashi Takemoto

Syuji Takahashi

Yoshiteru Ogawa

A method for manufacturing a light reflecting metal wall including a step (a) forming a cavity structure on a metal plate on which back surface a substrate is laminated, the cavity structure including on its side wall a light reflecting wall, the step (a) including the steps of (b) forming a first mask on a surface of the metal plate, the first mask having a mask opening portion corresponding to an opening portion of the cavity structure, and (c) forming the light reflecting wall on a side wall of the metal plate by carrying out wet etching with respect to the metal plate with the first mask, in the step (c), in the middle of the wet etching, the first mask being bent by press working along the light reflecting wall formed by the wet etching. As a result, the light reflecting metal wall is stably formed by securing both (i) an area of an LED chip mounting surface and (ii) a thickness of the light reflecting metal wall even if a packaged light-emitting element has a narrow lateral width of its short side.

Growing community of inventors

Sakai, Japan

Tomio Wakamatsu