Abstract:
PURPOSE: A light emitting device and a method of manufacturing the same are provided to increase light extraction efficiency by reducing the total reflection in the interface with outside. CONSTITUTION: In a light emitting device and a method of manufacturing the same, a metal layer(120) is formed on a substrate(110). A second type semiconductor layer(140) is formed on the metal layer. An active layer(150) is formed on the second type semiconductor layer. A first type semiconductor layer(160) is formed on the active layer. An output pattern layer(180) is formed on the first type semiconductor layer. An output pattern layer comprises an AlGaN layer(181) and an AlN layer(189).
Abstract:
본 발명은 플립칩형 질화물계 발광소자 및 그 제조방법에 관한 것으로서, 플립칩형 질화물계 발광소자는 기판, n형 클래드층, 활성층, p형 클래드층이 순차적으로 적층되어 있고, p형 클래드층 위에 안티몬, 불소, 인, 비소 중 적어도 하나의 첨가원소가 도핑된 주석산화물로 형성된 오믹콘택트층과, 오믹콘택트층 상부에 광을 반사하는 소재로 형성된 반사층을 구비한다. 이러한 플립칩형 질화물계 발광소자 및 제조방법에 의하면, 낮은 면저항과 높은 캐리어농도를 갖는 전도성 산화물 전극 구조체의 적용에 의해 전류-전압 특성이 개선되고 내구성을 향상시킬 수 있다.
Abstract:
유기금속화합물(organometallic compound)을 포함하는 주촉매; 및 나노입자(nanoparticle)를 포함하는 조촉매;의 존재 하에, 락타이드를 개환 중합하는 단계를 포함하는 폴리락트산 제조방법, 상기 방법으로 제조된 폴리락트산수지, 상기 수지를 포함하는 수지조성물 및 폴리락트산 제조용 촉매 시스템이 제시된다.
Abstract:
PURPOSE: A vertical light emitting device is provided to smoothly spread a current by forming a transparent electrode pattern in an intermediate region between metal electrode patterns. CONSTITUTION: A semiconductor layer includes an active layer for emitting light. A first electrode is arranged in one side of the semiconductor layer. A second electrode(70) is opposite to the semiconductor layer. One of the first and second electrodes includes a metal electrode pattern(80) and a transparent electrode pattern(85) in an intermediate region between the metal electrode patterns. The transparent electrode pattern is electrically connected to the metal electrode pattern.
Abstract:
PURPOSE: A semiconductor device and a manufacturing method thereof are provided to reduce crack generation when a nitride semiconductor layer is grown by compensating for tensile stress with compressive stress. CONSTITUTION: A secondary seed layer(15) includes a first substance for masking and a second material for secondary seeding. A nucleation layer(20) is grown up on the secondary seed layer. A nitride semiconductor layer(25) is grown up on the nucleation layer. A buffer layer is formed between the nucleation layer and the nitride semiconductor layer.
Abstract:
PURPOSE: A gallium nitride light emitting diode and a method for manufacturing the same are provided to increase light extraction efficiency by making one side of a pattern exposed to a reflective layer and covering the whole area of the silicon substrate with the reflective layer. CONSTITUTION: A buffer layer(120) and a first nitride layer(130) are successively formed on a silicon substrate(110). A pattern includes the sidewalls facing with each other by dry-etching the first nitride layer. A reflective film(140) is evaporated on the first nitride layer. An n-type nitride material from the exposed one side wall in horizontal to form an n-type nitride layer(150) covering a first nitride layer. A multi-quantum well activate layer(160) and a p-type nitride layer(170) are successively formed on the n-type nitride layer.