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    • 10. 发明专利
    • Nitride semiconductor laser element
    • 氮化物半导体激光元件
    • JP2014131019A
    • 2014-07-10
    • JP2013242961
    • 2013-11-25
    • Nichia Chem Ind Ltd日亜化学工業株式会社
    • MASUI SHINGO
    • H01S5/20H01L21/205H01S5/343
    • H01S5/34B82Y20/00H01S5/021H01S5/0213H01S5/2009H01S5/2018H01S5/2031H01S5/22H01S5/3013H01S5/3202H01S5/34333
    • PROBLEM TO BE SOLVED: To provide a nitride semiconductor laser element with improved internal quantum efficiency.SOLUTION: A nitride semiconductor laser element has an active layer 12 between an n-type semiconductor layer 11 and a p-type semiconductor layer 13. The n-type semiconductor layer has an n-side optical guide layer. The active layer has two or more well layers and at least one barrier layer provided between the well layers. The barrier layer has a barrier layer having a band gap energy higher than a band gap energy of the n-side optical guide layer. The p-type semiconductor layer has an electron barrier layer having a band gap energy higher than any of those of all the barrier layers included in the active layer, and includes a p-side optical guide layer disposed between the electron barrier layer and a final well layer that is a well layer closest to the p-type semiconductor layer of the two or more well layers. The p-side optical guide layer has a first region disposed on the final well layer side and having a band gap energy lower than that of the n-side optical guide layer and a second region disposed on the electronic barrier layer side and having a band gap energy higher than that of the n-side optical guide layer.
    • 要解决的问题:提供具有改善的内部量子效率的氮化物半导体激光元件。解决方案:氮化物半导体激光元件在n型半导体层11和p型半导体层13之间具有有源层12。 型半导体层具有n侧光导层。 有源层具有两个或更多个阱层,以及设置在阱层之间的至少一个势垒层。 阻挡层具有阻挡层,该阻挡层的带隙能量高于n侧光导层的带隙能量。 p型半导体层具有比有源层中包含的所有势垒层的能隙高的带隙能量的电子势垒层,并且包括设置在电子势垒层和最终导电层之间的p侧导光层 阱层是最靠近两个或更多个阱层的p型半导体层的阱层。 p侧光导层具有设置在最终阱层侧的具有低于n侧光导层的带隙能量的第一区域和设置在电子势垒层侧上的带隙能量的第二区域, 间隙能量高于n侧光导层的间隙能量。