Abstract:
This invention provides a process for producing a gallium nitride-based compound semiconductor laser element, characterized in that a plane inclined at not less than 0.16 degree and not more than 5.0 degrees in terms of absolute value in the direction of in (0001) Ga plane, or a plane in which the root mean square of (A 2 + B 2 ) is not less than 0.17 and not more than 7.0 wherein A represents the off angle of (0001) Ga plane to direction and B represents the off angle of (0001) Ga plane to direction, is used as a crystal growth plane of a gallium nitride substrate, and an active layer is grown at a growth rate of not less than 0.5 ú/sec and not more than 5.0 ú/sec. The production process is advantageous in that, even in the case of use of a gallium nitride substrate having a large off angle, the slope efficiency is high, the element resistance is reduced, the drive voltage can be reduced, the production yield is high, the variation is small, and high-output violet light can be generated. There is also provided a compound semiconductor laser element produced by the above process.
Abstract translation:本发明提供了一种生产基于氮化镓系化合物半导体激光元件,其特征做了平面在不低于0点16度倾斜,并且不大于5.0度的绝对值方面在<1-100>方向上 (0001)镓面,或其中的均方根的平面(A 2 + B 2)不大于零点17以下且不大于7.0 worin甲darstellt(0001)镓面的偏离角至<1-100 >方向和B darstellt(0001)镓面的至<11-20>方向,作为氮化镓衬底的晶体生长面,并且有源层上以不小于0.5的生长速率生长的偏离角 U / sec和不大于5.0 U /秒。 生产过程是有利的,即使是在,斜率效率是高的,该元件电阻减小,能够降低驱动电压使用具有大的偏离角的氮化镓衬底的情况下,成品率是高的, 的变化小,并且可以产生高输出紫色光。 因此,提供了通过上述方法制造的化合物半导体激光元件。
Abstract:
A semiconductor laser device comprising a semiconductor laser element, a frame having an element disposing section where elements are disposed, and a resin bonded to the frame, wherein the frame has a thick portion and a thin portion, the thick portion being formed to extend at least in the direction of the width of the resin to cover a region having a length equal to or greater than this width. Thereby, the thick-walled construction of the frame improves heat dissipation and strength. Also, it stabilizes the positioning reference plane and improves the accuracy of attachment.
Abstract:
A liquid crystal display device (10) having a stacked body where a first liquid crystal display panel (15) is disposed on one side of a light guiding plate (11) that leads out light to both of the front and rear sides thereof, a smaller second liquid crystal display panel (30) is disposed on the other side of the light guiding plate (11), and the panels and the light guiding plate are stacked, and the side in which the second liquid crystal display panel (30) is installed is covered by a metallic main body cover (40) having a flat surface that supports the display surface (30b) of the second liquid crystal display panel (30) at substantially the same level, and the main body cover (40) covers a circuit board (18) arranged around the second liquid crystal display panel (30), and is provided with an opening (42) to expose the display surface (30b) of the second liquid crystal display panel (30). Consequently, the crystal display device, easily housed in various devices, is provided.
Abstract:
In a wireless telephone of a mobile communication system the channel quality of a vacant channel is measured during reception in a first channel by transferring PLL data to the PLL prior to the slot in which the measurement is effected. The wireless telephone repeats the measurement of the channel qualities of the vacant channel and the current channel and transmits the results of the measurements until it receives a message from the base station commanding that the MAHO operation should be terminated.
Abstract:
In a liquid crystal display device provided with a backlight unit (1), creak reduction means is provided at least on one part of the areas where members constituting the liquid crystal display device such as the liquid crystal panel (3), the diffusion plate (13), the reinforcing plate (12), the frame (2) of the liquid crystal display device and the back surface reflector (11) for the backlight unit come into contact with each other. The creak reduction means may be a slippery film whose surface is fluorinated such as a fluororesin film, a polyacetal resin film, a polyethylene film, and a silicon coating film, or protrusions or protruding fins, or a friction reduction means such as silicon oil or fluorine oil, or a mutual displacement absorbing means such as a flexible sheet. By adopting such a constitution, it is possible to prevent noise from being generated due to mutual friction between the liquid crystal panel and the various members such as the diffusion plate, the reinforcing plate, the frame and the reflector for the backlight unit as a result of thermal expansion.
Abstract:
A compound semiconductor light emitting device for preparing a chip which improves the light extraction efficiency, enables mounting of easy positioning with only once wire bonding, and leads to a reduction in the manhour. One face of an insulative substrate (11) is overlaid with a semiconductor layer (4) consisting of a plurality of semiconductor thin films to form an active layer (15). One electrode (33) is formed on the top face of this semiconductor layer (4), and the other electrode (33) on the other face of the insulative substrate (11). For the exposure of a first semiconductor thin film layer (13) connected to the other electrode (33), the semiconductor film over the first semiconductor thin film layer (13) is removed to form an exposure region (10). This exposure region (10) is provided with a through hole (2) penetrating through the insulative substrate (11) and first semiconductor thin film layer (13). The first semiconductor thin film layer (13) and the other electrode (33) are electrically connected with a conductive material (3) formed on the through hole (2).
Abstract:
In a wireless telephone of a mobile communication system the channel quality of a vacant channel is measured during reception in a first channel by transferring PLL data to the PLL prior to the slot in which the measurement is effected. The wireless telephone repeats the measurement of the channel qualities of the vacant channel and the current channel and transmits the results of the measurements until it receives a message from the base station commanding that the MAHO operation should be terminated.