| 摘要 |
PURPOSE:To obtain LED of high output and high luminance by forming an electrode face on the bottom surface opposite to an opening to concavity so as to have a luminous part at the center of curvature. CONSTITUTION:A concavity 301a is etched in a given curvature on GaAs 301, AlGaAs 302 is laminated, and a luminous part 303 is formed at the center of curvature of the concavity through liquid phase epitaxial process and impurity diffusion. Next, GaAs 301 is etched selectively only at a portion of the concavity 301, and an electrode 304 is provided on AlGaAs 302 and an electrode 305 on GaAs 301. A window 304a is provided on the electrode 304 to completion. According to this constitution, a radiant power by reflecting can be extracted from the opening 304a as in the case of a direct light, therefore light output and luminance can be increased remarkably more than ever before. |
