| 摘要 |
PURPOSE:To obtain an LED array head which can be easily manufactured at low cost by a method wherein a wiring containing a pattern extending from one side to the opposite side and a pattern existing only on the one side in the same layer 1 is formed by insulating it from a LED array with an insulating layer on a plane, and the LED array is connected to a driving circuit via the wiring. CONSTITUTION:Among wirings 14, 16, 8 on a first layer formed directly on a substrate 2, the wiring 14 is the wiring for connecting a LED array 4 to a driving circuit IC 6 and is patternized. An insulating material layer 20 is formed on the wiring 14 excepting its both ends, and a second layer wiring 22 is formed on said insulating material layer 20. The wiring 14 contains a wiring 14a extending from an one side on which the driving circuit IC 6 is arranged to an opposite side of the LED array 4, and a wiring 14b existing only on the one side of the LED array 4. A space between individual electrode terminals of the LED array 4 are connected with wires 28, 30. Spaces between terminals of the wiring 14a, 14b and a terminal of the driving circuit IC 6 are connected with a wire 32. Since a fine wiring pattern is only the first layer wiring 14, manufacture of a laminated substrate becomes easy, and substrate cost is reduced. |
