摘要:
The present invention relates to a two-wavelength semiconductor laser device, more particularly, to a fabrication method of a multi-wavelength semiconductor laser device. In this method, a substrate having an upper surface separated into at least first and second areas is provided. Then, a first dielectric mask on the substrate is formed to expose only the first area. Then, epitaxial layers for a first semiconductor laser are grown on the first area of the substrate. Then, a second dielectric mask on the substrate is formed to expose only the second area. Then, epitaxial layers for a second semiconductor laser are grown on the second area of the substrate.
摘要:
The present invention provides a method for forming a multi-wavelength semiconductor laser device. The method comprises sequentially forming an AlGaAs-based epitaxial layer for a first semiconductor laser diode and an etching stop layer composed of AlxGayIn(1-x-y)P (0≦x≦1, 0≦y≦1) on a substrate and sequentially growing an n-type GaAs flattening buffer layer and an AlGaInP-based epitaxial layer for a second semiconductor laser diode on the substrate, after selectively removing the AlGaAs-based epitaxial layer and the etching stop layer.
摘要翻译:本发明提供一种形成多波长半导体激光器件的方法。 该方法包括顺序形成用于第一半导体激光二极管的AlGaAs基外延层和由AlxGayIn(1-xy)P(0≤x≤1,0<= y <= 1)组成的蚀刻停止层) 在选择性地除去基于AlGaAs的外延层和蚀刻停止层之后,在衬底上顺序生长n型GaAs平坦化缓冲层和用于第二半导体激光二极管的AlGaInP基外延层。
摘要:
A vertical GaN-based LED includes an n-type bonding pad; an n-electrode formed under the n-type bonding pad; a light-emitting structure formed by sequentially laminating an n-type GaN layer, an active layer, and a p-type GaN layer under the n-electrode; a p-electrode formed under the light-emitting structure; and a support layer formed under the p-electrode. The light-emitting structure has or or more trenches which are spaced at a predetermined distance with the n-electrode from the outermost side of the light-emitting structure and in which the active layer of the light-emitting structure is removed.
摘要:
Disclosed is a method of forming a pattern on a mask sheet including an attaching portion to be attached to a mask frame, and a pattern area in which the pattern is formed. The method includes positioning the mask sheet on an auxiliary sheet with a thickness greater than the thickness of the mask sheet, fastening the auxiliary sheet to the mask frame, applying a stretching force to the mask sheet and the auxiliary sheet, and forming the pattern on the pattern area of the mask sheet. Thus, a predetermined pattern is formed on a mask sheet while a uniformly distributed external force is applied to the mask sheet, so that bending or deflecting out of plane by the mask sheet is prevented, thereby forming a precise mask pattern.
摘要:
The present invention relates to a vertically-structured nitride semiconductor light emitting diode. The vertically-structured nitride semiconductor light emitting diode includes an n-type electrode; an n-type nitride semiconductor layer that is formed on the lower surface of the n-type electrode and on which surface texturing with a diffraction grating structure is formed, the diffraction grating structure composed of more than one line; an active layer that is formed on the lower surface of the n-type nitride semiconductor layer; a p-type nitride semiconductor layer that is formed on the lower surface of the active layer; and a p-type electrode that is formed on the lower surface of the p-type nitride semiconductor layer.
摘要:
Provided is a composition for cancer treatment including phytosphingosine or a derivative thereof, or a pharmaceutically acceptable salt thereof as an active ingredient.
摘要:
The present invention relates to a lighting device for display device used in vehicles, the light device including an indicator provided with a rotating shaft; a graphic plate disposed under the indicator and having a through hole formed in the center thereof, into which the rotating shaft is inserted; and an LED section that is disposed under the graphic plate, generates light onto the graphic plate, and is provided with LED chips having different colors.
摘要:
A vertical GaN-based LED is provided. The vertical GaN-based LED includes an n-type bonding pad, an n-type reflective electrode formed under the n-type bonding pad, an n-type transparent electrode formed under the n-type reflective electrode, an n-type GaN layer formed under the n-type transparent electrode, an active layer formed under the n-type GaN layer, a p-type GaN layer formed under the active layer, a p-electrode formed under the p-type GaN layer and having an uneven profile at a surface which does not come in contact with the p-type GaN layer, a p-type reflective electrode formed along the uneven surface of the p-type electrode, and a support layer formed under the p-type reflective electrode.
摘要:
Disclosed herein is a printed circuit board including embedded capacitors, composed of a polymer condenser laminate including a plurality of polymer condenser layers, each of which has a polymer sheet and a conductor pattern formed on the polymer sheet, and a via hole for interlayer connection therethrough, and a circuit layer formed on either surface or both surfaces of the polymer condenser laminate and having a circuit pattern and a via hole for interlayer connection therethrough. The printed circuit board of the current invention has higher capacitance density per unit area than conventional embedded capacitor printed circuit boards, whereby capacitors having various capacitance values, such as multilayered ceramic capacitors having high capacitance, can be embedded in the printed circuit board, instead of being mounted thereon. Also, a method of manufacturing the printed circuit board including embedded capacitors is provided.
摘要:
The present invention is related to a printed circuit board having embedded capacitors using a hybrid material and a method of manufacturing the same. This invention provides a printed circuit board having embedded capacitors using a material for a hybrid dielectric layer including liquid crystal polymer and ceramic powder, and a method of manufacturing such a printed circuit board.