Semiconductor laser device, and image display device
View Patent ↗A semiconductor laser device and an image display device that efficiently release a heat from stripe active regions, and operated at a low-consumption current and a low-consumption electric power. A semiconductor laser element includes stripe active regions for emitting laser beams. On a base block, there are formed wirings electrically connected to stripe laser electrodes of the semiconductor laser element, respectively. The stripe laser electrodes corresponding to the stripe active regions are formed in proximity to a first surface of the semiconductor laser element, close to the active regions. An electric current is supplied to the active regions from connecting portions between each of the laser electrodes and the wirings.
1. A semiconductor laser device, comprising:
a semiconductor laser element including stripe active regions for emitting laser beams;
a base block on which wirings are formed, the wirings being electrically connected to stripe laser electrodes of said semiconductor laser element, respectively, the stripe laser electrodes corresponding to the stripe active regions being formed in proximity to a first surface of said semiconductor laser element, close to the stripe active regions; and
a package for disposing said base block with said semiconductor laser element, said package including a connecting electrode part for connecting the semiconductor laser device to an external device, wherein
an electric current is supplied to the stripe active regions from connecting portions between each of the laser electrodes and the wirings,
a rear electrode is formed across a second surface of said semiconductor laser element, the second surface being formed in parallel to the first surface and opposing the first surface,
respective ends of conductive wires are discreetly connected to the rear electrode at both ends and a middle portion of each corresponding stripe active region, and
the respective other ends of the conductive wires are connected to the connecting electrode part.
2. The semiconductor laser device according to claim 1 , wherein
the wirings are respectively connected to electrode parts formed in a periphery of a laser mounting surface on said base block where said semiconductor laser element is mounted.
3. The semiconductor laser device according to claim 2 , further comprising:
a circuit board including a first substrate electrode part to be electrically connected to a corresponding electrode part, wherein
a bump is formed on the first substrate electrode part, and
the respective electrode parts and the first substrate electrode part are electrically connected to each other via the bump.
4. The semiconductor laser device according to claim 3 , wherein
a rear electrode is formed on a second surface of said semiconductor laser element, the second surface being formed in parallel to the first surface and opposing the first surface,
the circuit board further includes a second substrate electrode part to be electrically connected to the rear electrode,
a bump is formed on the second substrate electrode part, and
the rear electrode and the second substrate electrode part are electrically connected to each other via the bump.
5. The semiconductor laser device according to claim 1 , wherein
the respective ends of the conductive wires are connected to the rear electrode at multiple sites thereof with a matrix pattern.
6. The semiconductor laser device according to claim 1 , wherein
the respective ends of the conductive wires are connected to the rear electrode at a position opposing the corresponding laser electrode with respect to the corresponding active region.