Laser diode array, optical scanning device and printing apparatus
View Patent ↗According to an aspect of the present invention, there is provided a laser diode array including: a laser array chip including: a substrate; and at least three of laser diodes that are formed on the substrate; first electrodes that are formed on each of the laser diodes so as to be isolated from one another; a sub-mount; and second electrodes that are formed on the sub-mount so as to correspond to the first electrodes and so as to be isolated from one another, wherein the laser array chip is mounted on the sub-mount through the first electrodes and the second electrodes, and wherein, among contacting surfaces between each of the first electrodes and a corresponding one of the second electrodes, a contacting area of a central one of the contacting surfaces is larger than that of an end one of the contacting surfaces.
1. A laser diode array comprising:
a laser array chip including:
a substrate; and
at least three of laser diodes that are formed on the substrate;
first electrodes that are formed on each of the laser diodes so as to be isolated from one another;
a sub-mount; and
second electrodes that are formed on the sub-mount so as to correspond to the first electrodes and so as to be isolated from one another,
wherein the laser array chip is mounted on the sub-mount through the first electrodes and the second electrodes, and
wherein, among contacting surfaces between each of the first electrodes and a corresponding one of the second electrodes, a contacting area of a central one of the contacting surfaces is larger than that of an end one of the contacting surfaces.
2. The laser diode array according to claim 1 ,
wherein, among the first electrodes, a width of a central one of the first electrodes is larger than that of an end one of the first electrodes.
3. The laser diode array according to claim 1 ,
wherein, among the second electrodes, a width of a central one of the second electrodes is larger than that of an end one of the second electrodes.
4. The laser diode array according to claim 1 ,
wherein each of widths of the first electrodes and a corresponding one of widths of the second electrodes are set to be equal.
5. The laser diode array according to claim 1 ,
wherein contacting areas of the contacting surfaces are adjusted by changing widths of the first electrodes.
6. The laser diode array according to claim 1 ,
wherein contacting areas of the contacting surfaces are adjusted by changing widths of the second electrodes.
7. An optical scanning device comprising the laser diode array according to claim 1 .
8. A printing apparatus comprising the laser diode array according to claim 1 .