| 摘要 |
PURPOSE:To obtain a product which can increase an allowable current margin, has high reliability and is stable and a low price, by setting the rise angle of the bonding wire connected to an LED array chip from the surface of the LED array chip a specific value or below. CONSTITUTION:An LED array chip 2 is mounted and printing is carried out by using light emitted by a current supplied to the LED array chip 2 via a bonding wire 3 from an external circuit. In such an LED recording head, the rise angle A of the bonding wire 3 connected to the LED array chip 2 against the surface of the LED array chip is made nearly 45 degrees or below. For the means of setting the angle A 45 deg. or below, e.g., wedge bonding is used. This can avoid the adverse effects against the printing by the reflection of light due to the bonding wire 3 and the allowable margin of a current value is increased. |
