| 摘要 |
PURPOSE:To miniaturize an LED printer head by forming a groove on a monolithic light emitting diode array chip composing a diode array paralleling the luminous surface. CONSTITUTION:Grooves are made between end face luminous LEDs 701-1, 701-2, 701-3... paralleling the luminous surface until cutting off the P-N junction face. When the length from the luminous surface back to the first groove is represented by l'23w, the area of an electrode gives l'23wXl23x. But the quantity of light can be much larger than l'23w/l23w by selecting the length l'23w properly, which enables the preparation of an LED array substrate with a high light emitting efficiency. |
