Abstract:
Disclosed are a light emitting diode (LED), an LED module including the same, and a method of fabricating the same. The light emitting diode includes a first conductive-type semiconductor layer; a second conductive-type semiconductor layer; an active layer interposed between the first conductive-type semiconductor layer and the second conductive-type semiconductor layer; a first electrode pad region electrically connected to the first conductive-type semiconductor layer; a second electrode pad region electrically connected to the second conductive-type semiconductor layer; and a spark gap formed between a first leading end electrically connected to the first electrode pad region and a second leading end electrically connected to the second electrode pad region. The spark gap can achieve electrostatic discharge protection of the light emitting diode.
Abstract:
A UV light emitting device and a method for fabricating the same are disclosed. The method includes forming a first super-lattice layer including Al x Ga (1-x) N on a substrate, forming a sacrificial layer including Al z Ga (1-z) N on the first super-lattice layer, partially removing the sacrificial layer, forming an epitaxial layer on the sacrificial layer, and separating the substrate from the epitaxial layer, wherein the sacrificial layer includes voids, the substrate is separated from the epitaxial layer at the sacrificial layer, and forming an epitaxial layer includes forming an n-type semiconductor layer including n-type Al u Ga (1-u) N (0
Abstract translation:公开了一种UV发光器件及其制造方法。 该方法包括在衬底上形成包括Al x Ga(1-x)N的第一超晶格层,在第一超晶格层上形成包含AlzGa(1-z)N的牺牲层,部分去除牺牲层,形成 外延层,并且将所述衬底与所述外延层分离,其中所述牺牲层包括空隙,所述衬底在所述牺牲层处与所述外延层分离,并且形成外延层包括形成n型半导体层,所述n型半导体层包括 n型AluGa(1-u)N(0
Abstract:
Embodiments of the invention provide a method of fabricating a nitride substrate. The method includes preparing a growth substrate; forming a sacrificial layer on the growth substrate, the sacrificial layer including an indium (In)-containing nitride horizontal etching layer and an upper nitride sacrificial layer disposed on the nitride horizontal etching layer; partially etching the sacrificial layer, the partially etching the sacrificial layer including horizontal etching of the nitride horizontal etching layer; forming a nitride epitaxial layer on the upper nitride sacrificial layer by hydride vapor phase epitaxy (HVPE); and separating the nitride epitaxial layer from the growth substrate, wherein the nitride epitaxial layer is separated from the growth substrate in the nitride horizontal etching layer.
Abstract:
The present invention relate to a portable device for sterilization and deodorization, which exhibits highly efficient sterilization and deodorization functions by an effective combination of a direct sterilization structure utilizing UV light and a sterilization/deodorization structure utilizing a photocatalyst and can be easily attached to and detached from various products. The portable device for sterilization and deodorization includes: a case having an air inlet port, a discharge port and a UV light emission port; a filter disposed in the case and coated with a photocatalyst; a first ultraviolet light emitting diode (UV LED) module disposed in the case and configured to irradiate UV light having a first wavelength to the filter in order to activate the photocatalyst; and a second UV LED module disposed in the case and configured to irradiate UV light having a second wavelength to circulating air outside the case through the UV light emission port.
Abstract:
Exemplary embodiments of the present invention disclose a method of fabricating a gallium nitride (GaN) based semiconductor device. The method includes growing GaN based semiconductor layers on a first surface of a GaN substrate to form a semiconductor stack, and separating at least a first portion of the GaN substrate from the semiconductor stack using a wire cutting technique.
Abstract:
Disclosed is a light emitting diode (LED). The LED includes a transparent substrate having a first surface and a second surface; a GaN-based semiconductor-laminated structure including a first conductive semiconductor layer, an active layer and a second conductive semiconductor layer and formed on the first surface of the transparent substrate; and a refractive index control layer formed on the second surface of the transparent substrate and having a pattern on a lower surface thereof. With the refractive index control layer, loss of light generated in a lower surface of the transparent substrate can be reduced to improve light extraction efficiency.
Abstract:
A method of fabricating a gallium nitride (GaN)-based semiconductor device. The method includes preparing a GaN substrate having lower and upper surfaces; growing GaN-based semiconductor layers on the upper surface of the GaN substrate to form a semiconductor stack; forming a support substrate on the semiconductor stack; and separating the GaN substrate from the semiconductor stack. The separating of the GaN substrate includes irradiating a laser from the lower surface of the GaN substrate. The laser is transmitted through the lower surface of the GaN substrate and forms a laser absorption region inside a structure consisting of the GaN substrate and the semiconductor stack.
Abstract:
A light emitting stacked structure including a plurality of epitaxial sub-units disposed one over another, each of the epitaxial sub-units configured to emit different colored light, in which each epitaxial sub-unit has a light emitting area that overlaps one another, and at least one epitaxial sub-unit has an area different from the area of another epitaxial sub-unit.
Abstract:
A light emitting stacked structure including a plurality of epitaxial sub-units disposed one over another, each epitaxial sub-unit configured to emit colored light having different wavelength band from each other, and a common electrode disposed between and connected to adjacent epitaxial sub-units, in which light emitting regions of the epitaxial sub-units overlap each other.
Abstract:
An approach for controlling ultraviolet intensity over a surface of a light sensitive object is described. Aspects involve using ultraviolet radiation with a wavelength range that includes ultraviolet-A and ultraviolet-B radiation to irradiate the surface. Light sensors measure light intensity at the surface, wherein each sensor measures light intensity in a wavelength range that corresponds to a wavelength range emitted from at least one of the sources. A controller controls the light intensity over the surface by adjusting the power of the sources as a function of the light intensity measurements. The controller uses the light intensity measurements to determine whether each source is illuminating the surface with an intensity that is within an acceptable variation with a predetermined intensity value targeted for the surface. The controller adjusts the power of the sources as a function of the variation to ensure an optimal distribution of light intensity over the surface.