Abstract:
A light emitting device includes a substrate elongated in a lengthwise direction; a plurality of LED chips disposed on the substrate in an intermediate region in widthwise direction, and aligned along the lengthwise direction at a distance of 80 μm or less; and interconnection wirings formed on regions outside the intermediate region in the widthwise direction; wherein each of the LED chips has a p-side electrode disposed on the substrate, a p-type semiconductor layer disposed on the p-side electrode, an active layer formed on the p-type semiconductor layer, and an n-type semiconductor layer formed on the active layer, and has a region in which the n-type semiconductor layer, the active layer, and the p-type semiconductor layer are patterned, and an n-side electrode formed selectively on a surface of the n-type semiconductor layer and connected to the p-side electrode of an adjacent LED chip through the interconnection wiring.
Abstract:
A step of forming, on a surface of a semiconductor structure layer, easily-to-be-etched portions arranged on the basis of crystal directions on the surface of the semiconductor structure layer and a step of subjecting the surface of the semiconductor structure layer to wet etching to form an uneven structure surface including a plurality of protrusions derived from a crystal structure of the semiconductor structure layer on the surface of the semiconductor structure layer are included.
Abstract:
A semiconductor light-emitting device includes a semiconductor laminate containing an n-type layer, a light-emitting layer, and a p-type layer, via holes penetrating the p-type and the light-emitting layers exposing the n-type layer, a p-side electrode extending on the p-type layer and having light reflectivity, which is separated from each of the boundary edges of the p-type layer and the plurality of via holes, an insulating layer which covers via hole side surfaces and extends on the p-type layer, and which extends on the boundary edge portion of the p-side electrode, and n-side electrodes which are electrically connected to the n-type layer at the bottoms of the via holes, which are led above the p-type layer and the p-side electrode with the insulating layer intervening therebetween, which overlap the p-side electrode without gaps, in a plan view, and which have light reflectivity.
Abstract:
A semiconductor light emitting element comprises an optical semiconductor laminated layer providing vias, an electrode that is disposed on a surface of the optical semiconductor laminated layer and separated from the second semiconductor layer in a peripheral portion of the electrode, a first transparent insulating layer that is disposed between the peripheral portion of the electrode and the optical semiconductor laminated layer, and a second transparent insulating layer that is disposed to cover the electrode, that envelops the peripheral portion of the electrode together with the first transparent insulating layer.
Abstract:
A semiconductor light emitting apparatus includes semiconductor lamination of n-type layer, active layer, and p-type layer; recess penetrating the lamination from the p-type layer and exposing the n-type layer; n-side electrode formed on the n-type layer at the bottom of the recess and extending upward above the p-type layer; a p-side electrode formed on the p-type layer and having an opening surrounding the recess in plan view, the n-side electrode extending from inside to above the recess; and an insulating layer disposed between the p-side and the n-side electrodes on the p-type layer, the p-side electrode constituting a reflective electrode reflecting light incident from the active layer, the n-side electrode including a reflective electrode layer covering the opening in plan view and reflects light incident from the emission layer side, the reflective electrode layer having peripheral portion overlapping peripheral portion of the p-side electrode in plan view.
Abstract:
A light-emitting device can prevent light from leaking through an unwanted area (or an unintended area) and can improve color unevenness and brightness unevenness. A method of producing such a light-emitting device, can include: disposing a plurality of light-emitting elements on a surface of a supporting substrate; forming a reflecting layer on the respective light-emitting elements along peripheries of the light-emitting elements facing an area between the light-emitting elements; forming a wavelength conversion layer so as to embed the plurality of light-emitting elements therein on the supporting substrate; and irradiating the wavelength conversion layer with laser beams to remove the wavelength conversion layer disposed at the area between the light-emitting elements.
Abstract:
An LED device includes first and second LED elements containing a lower layer of first conductivity type, an active layer, and an upper layer of second conductivity type, wherein the second LED element has third and fourth electrodes on the lower layer, recessed portion having a side surface exposing the upper, active and lower layers, and reaching the third electrode, fifth electrode disposed on the upper layer extending on the side surface of the recessed portion, and connected with the third electrode, and groove extending from the upper layer and reaching the active layer between the third and fourth electrodes to electrically separate the third electrode from the fourth electrode.
Abstract:
A vehicular lighting device from which a fluorescent material is omitted that may cause deterioration of color rendering properties and occurrence of color separation is provided. The vehicular lighting device can have higher in color rendering properties than a conventional white light source obtained by combining a semiconductor light-emitting element such as an LD and the fluorescent material (wavelength converting member) and can suppress occurrence of color separation. A vehicular lighting device of the presently disclosed subject matter includes a supercontinuum light source that outputs supercontinuum light containing a visible wavelength region, and an optical system that controls the supercontinuum light output by the supercontinuum light source.
Abstract:
The semiconductor optical device has a chip of semiconductor lamination having a first semiconductor layer of a first conductivity type having a first surface, a second semiconductor layer of a second conductivity type opposite to the first conductivity type having a second surface, and an active layer sandwiched between the first semiconductor layer and the second semiconductor layer, the chip having side surface including a first side surface which is contiguous to the second surface, forms an obtuse angle with the second surface, extends across the second semiconductor layer and the active layer, and enters the first semiconductor layer, and a cracked surface which is contiguous to the first side surface, a first conductivity type side electrode formed on the first surface, and a second conductivity type side electrode formed on the second surface, wherein in-plane size of the semiconductor lamination is 50 μm or less.
Abstract:
A semiconductor light-emitting device comprises: a mounting substrate; a plurality of semiconductor light-emitting elements that are arranged on the mounting substrate; a light absorber that is formed so as to cover an entire region between the plurality of semiconductor light-emitting elements adjacent to each other on the mounting substrate; and a wiring group including a plurality of wirings wired to each of the plurality of semiconductor light-emitting elements.