| 摘要 |
PURPOSE:To improve the fetching efficiency of light by a method wherein a reflective section is provided around a luminous section and constitution is made to fetch the light which is nearly in parallel with a pn junction surface by reflecting the light in the longitudinal direction. CONSTITUTION:A conical projected section is formed at the central position of the p-clad layer 2 and a p-active layer 3 of a light emitting element and a reflective film 10 consisting of an SiO2 film and a chrome film are deposited on the inside of the projected section. The reflective film 10 forms projected shape for a fetching window 8 and a projection-shaped electrode 11 is provided in ring shape around the reflective film. In this way, a luminous section L becomes ring shape and light in the longitudinal direction reaches the window 8 by transmitting an n-clad layer 4 and the light which runs to the center from the luminous section and is in parallel with a pn junction is also reflected by the reflective film 10 and the light is converted to nearly longitudinal direction to fetch from the window 8. As a result, the fetching efficiency of light is improved. |
