| 摘要 |
PURPOSE:To obtain an image of high printing quality, and to attain an optical printer head having a simple structure including no optical system such as a focusing element, etc. by fixedly connecting the light emitting face of a LED array to a metal plate having many through pores, fixedly connecting a wiring pattern formed on an insulating plate to the array, and using the metal plate as the common electrode of the array. CONSTITUTION:A LED array 1 secured to a metal plate 3 is diced from its rear face side to electrically isolate light emitting elements. In this case, dicing grooves 8 arrives at least at a P-type layer 7. The LED array 1 and the plate 3 isolated at each element are placed fixedly on a circuit board 11. An insulating layer 12 having a satisfactory thermal transfer rate is formed on a heat sink plate 4 made of metal on the board 11, and a wiring pattern 5 and resist 9 are formed on the layer 12. The N-type electrode of the LED array 1 is secured to the pattern 5 with conductive adhesive 15. The plate 2 is secured onto the resist 9 of the board 11 bent in a protrusion state with adhesive to hermetically seal the LED array 1. |
