| 摘要 |
PURPOSE:To enable the reduction in the cost of the LED and the prevention of the separation of a spherical lens by enabling the adoption of an extremely inexpensive spherical lens by coating the surface of the lens with a resin film. CONSTITUTION:This device is fixed on a metallic base 21 with a light emitting element 22 or an electrode and a low melting point metal 23, and the spherical lens 25 is fixed on the photo lead-out part 24 of the element 22 with the resin 26. First, an N type GaAs crystal layer 222 is formed on a P type GaAs substrate 221, and this crystal layer 222 is partly provided with a hole 223 by utilization of the photo engraving process (PEP). Next, a P type GaAlAs layer 224, a P type GaAlAs active layer 225, and an N type GaAlAs layer 226 are successively formed thereon. An N type electrode 227 and a P type electrode 23 are formed, and a photo lead-out window is provided in the electrode 227 by utilization of the PEP technique. After this light emitting element is fixed on the base 21, the lens 25 is fixed with the Si resin 26. The method of fixing is: first, liquid resin is placed on the element in a small amount, and next the lens 25 is dropped down on the resin. Then, a resin film is formed on the surface by the rotation of the lens 25, and the resin is hardened by temperature increase in the state. |
