Lg Electronics Inc.

Lg Innotek Co., Ltd.

Verticle, Inc.

Oriol Inc.

Other

Myung Cheol Yoo

In-kwon Jeong

Jong Lam Lee

Jong-Lam Lee

Geun-Young Yeom

Kyong-Nam Kim

Wolfram Urbanek

Youn-joon Sung

Chang-hyun Jeong

Dong-woo Kim

Inkwon Jeong

Youn-Joon Sung

Dong-Woo Kim

A light emitting device can include a light emitting structure including a p-GaN based semiconductor layer, an active layer having multiple quantum wells, and an n-GaN based semiconductor layer; a p-electrode and an n-electrode electrically connecting with the light emitting structure, respectively, wherein the n-electrode has a plurality of layers; a first passivation layer including a first portion contacting a portion of the n-electrode, a second portion vertically overlapped with the p-electrode, and a third portion that extends outside of outermost side surfaces of the light emitting structure; a phosphor layer disposed on a top surface of the light emitting structure; and a second passivation layer including a first portion disposed between the phosphor layer and the top surface of the light emitting structure, and a second portion disposed on the outermost side surfaces of the light emitting structure, in which the phosphor layer includes a pattern to bond a wire with a p-pad on a portion of the p-electrode, the second portion of the second passivation layer extends toward the third portion of the first passivation and contacts the third portion of the first passivation layer, and the first passivation layer includes an opening on the n-GaN based semiconductor layer such that the opening accommodates at least a portion of the n-electrode.

Thin film light emitting diode

A vertical topology light emitting device can include a conductive support structure; an adhesion layer disposed on the conductive support structure; a p-type contact disposed on the adhesion layer; a GaN-based semiconductor structure disposed on the p-type contact, in which the GaN-based semiconductor structure includes an n-type GaN-based layer, a p-type GaN-based layer, and an active layer between the n-type GaN-based layer and the p-type GaN-based layer, in which the n-type GaN-based layer has an etched flat surface, and the GaN-based semiconductor structure includes a bottom surface proximate to the conductive support structure, a top surface opposite to the bottom surface, and a side surface between the top surface and the bottom surface; an interface layer on the GaN-based semiconductor structure; and a contact pad disposed on the interface layer, in which the interface layer includes a portion which directly contacts the etched flat surface of the n-type GaN-based layer, and a first thickness of the conductive support structure is 0.5 times less than a width of the top surface of the GaN-based semiconductor structure.

Vertical topology light emitting device

A light-emitting device can include a conductive support structure comprising a metal; a GaN-based semiconductor structure disposed on the conductive support structure, the GaN-based semiconductor structure including a p-type GaN-based layer, a GaN-based active layer and an n-type GaN-based layer, in which the GaN-based semiconductor structure has a first surface, a side surface and a second surface, in which the first surface, relative to the second surface, is proximate to the conductive support structure, in which the second surface is opposite to the first surface, in which the conductive support structure is thicker than the p-type GaN-based semiconductor layer, and the conductive support structure is thicker than the n-type GaN-based semiconductor layer; a p-type electrode disposed on the conductive support structure; an n-type electrode disposed on the second surface of the GaN-based semiconductor structure; and a passivation layer disposed on the side surface and the second surface of the GaN-based semiconductor structure.

Vertical structure LEDs

Monolithic pixels are implemented by laterally disposed green, blue and red micro-LED sub-pixels separated by dielectric sidewalls. The green and blue sub-pixels are formed with nitride-based material layers while the red sub-pixel is formed with non-nitride-based material layers that yield an optically-efficient red sub-pixel that is intensity-balanced with the green and blue sub-pixels.

Full-color monolithic micro-LED pixels

A light emitting device can include a substrate including first and second surfaces, the substrate having a thickness of less than 350 micrometers; a reflective layer on the second surface of the substrate; a light emitting structure on the first surface of the substrate and including first and second semiconductor layers with an active layer therebetween, the second semiconductor layer includes an aluminum-gallium-nitride layer, and the active layer includes aluminum and indium and has a multiple quantum well layer; a transparent conductive layer disposed on the second semiconductor layer and including an indium-tin-oxide; a first electrode on the first semiconductor layer and including multiple layers; a second electrode on the transparent conductive layer and including multiple layers; first and second pads on the first and second electrodes, respectively, in which the second pad includes the same material as the first pad and has a thickness of more than 500 nanometers.

Diode having high brightness and method thereof

A method for manufacturing a light emitting diode can include forming a GaN-based semiconductor structure with a thickness of less than 5 microns on a substrate, the GaN-based semiconductor structure having a p-type GaN-based semiconductor layer; an active layer on the p-type GaN-based semiconductor layer; and an n-type GaN-based semiconductor layer on the active layer; forming a p-type electrode having multiple metal layers on the GaN-based semiconductor structure; forming a metal support layer on the p-type electrode; removing the substrate from the GaN-based semiconductor structure to expose an upper surface of the GaN-based semiconductor structure; forming an n-type electrode on a flat portion produced by polishing the exposed upper surface of the GaN-based semiconductor structure, not only with overlapping at least a portion of the p-type electrode in a thickness direction of the GaN-based semiconductor structure but also with contacting the flat portion; and forming an insulating layer on the upper surface of the GaN-based semiconductor structure and on an entire side surface of the GaN-based semiconductor structure, in which a first part formed on the upper surface of the GaN-based semiconductor structure in the insulating layer contacts the upper surface of the GaN-based semiconductor structure and a side surface of the n-type electrode, and a second part formed on the entire side surface of the GaN-based semiconductor structure in the insulating layer does not contact the n-type electrode.

A method of manufacturing a light emitting device can include forming an n-type GaN-based layer on a sapphire substrate; forming a GaN-based active layer on the n-type GaN-based layer; forming a p-type GaN-based layer on the GaN-based active layer; forming a p-type electrode on the p-type GaN-based layer; forming a metal substrate on the p-type electrode; removing the sapphire substrate; forming an n-type electrode on the n-type GaN-based layer; forming a passivation layer on a side surface of the p-type GaN-based layer, a side surface of the GaN-based active layer, a side surface of the n-type GaN-based layer, an upper surface of the n-type GaN-based layer, a side surface of the n-type electrode, and an upper surface of the n-type electrode after the forming the n-type electrode; and forming an open space to expose the n-type electrode by patterning the passivation layer.

A light emitting device can include a metal support structure comprising Cu; an adhesion structure on the metal support structure; a reflective conductive contact on the adhesion structure; a GaN-based semiconductor structure on the reflective conductive contact, in which the GaN-based semiconductor structure includes a first-type semiconductor layer on the metal support structure, an active layer on the first-type semiconductor layer, and a second-type semiconductor layer on the active layer, the GaN-based semiconductor structure includes a bottom surface proximate to the metal support structure, a top surface opposite to the bottom surface, and a side surface between the top surface and the bottom surface, and a first thickness of the GaN-based semiconductor structure from the bottom surface to the top surface is less than 5 micrometers; an interface layer on the GaN-based semiconductor structure; and a contact pad on the interface layer, in which a second thickness of the metal support structure is 0.5 times less than a width of the top surface of the GaN-based semiconductor structure.

A light emitting device includes a first conductive-type layer, an active layer, and a second conductive-type layer; a first electrode on a first surface of the first conductive-type layer, the first electrode having a multilayer structure including Pt; a first pad on the first electrode, the first pad disposed on an edge of the first surface of the first conductive-type layer in a cross-sectional view; and a second electrode and a second pad on a second surface of the second conductive-type layer, the second electrode having a metal layer including Ti. In addition, the first pad include Au, further the second electrode is unitary with the second pad, and also the second electrode includes a reflective layer configured to reflect light from the active layer.

Diode having vertical structure

A light emitting device can include a light emitting structure including a p-GaN based layer, an active layer having multiple quantum wells, and an n-GaN based layer; a p-electrode and an n-electrode electrically connecting with the light emitting structure, respectively, in which the n-electrode has a plurality of layers; a phosphor layer disposed on a top surface of the light emitting structure; and a passivation layer disposed between the phosphor layer and the top surface of the light emitting structure, and disposed on outermost side surfaces of the light emitting structure, in which the p-electrode and the n-electrode are disposed on opposite sides of the light emitting structure. Also, the phosphor layer has a two-digit micrometer thickness, and includes a pattern to bond an n-electrode pad on a portion of the n-electrode by a wire, and comprises different phosphor materials configured to emit light of different colors.

A light emitting diode can include a metal support layer: a GaN-based semiconductor structure having a less than 5 microns thickness on the metal support layer, the GaN-based semiconductor structure including a p-type GaN-based semiconductor layer, an active layer on the p-type GaN-based semiconductor layer, and an n-type GaN-based semiconductor layer on the active layer; a p-type electrode on the metal support layer and including a plurality of metal layers; an n-type electrode on a flat portion of an upper surface of the GaN-based semiconductor structure, and the n-type electrode contacts the flat portion; a metal pad layer on the n-type electrode; and an insulating layer including a first part disposed on the upper surface of the GaN-based semiconductor structure, and a second part disposed on an entire side surface of the GaN-based semiconductor structure, in which the metal pad layer includes a first portion having a flat bottom surface on the n-type electrode, and a second portion having stepped surfaces.

A light emitting device includes an adhesion structure on a metal support structure; a first metal layer on the adhesion structure; a second metal layer comprising Ti on the first metal layer; a GaN-based semiconductor structure on the second metal layer, which includes a first-type semiconductor layer on the metal support structure, an active layer on the first-type semiconductor layer, a second-type semiconductor layer on the active layer, a bottom surface proximate to the metal support structure, a top surface, and a side surface, in which a first thickness of the GaN-based semiconductor structure from the bottom surface to the top surface is less than 5 micrometers; an interface layer comprising Ti; and a contact pad, in which the second metal layer directly contacts the GaN-based semiconductor structure, and a second thickness of the metal support structure is 0.5 times or less than a width of the top surface.

A light emitting device can include a GaN layer having a multilayer structure that can include an n-type layer, an active layer, and a p-type layer, the GaN layer having a first surface and a second surface; a conductive structure on the first surface of the GaN layer, the conductive structure includes a first electrode in contact with the first surface of the GaN layer, the first electrode is configured to reflect light from the active layer back through the second surface of the GaN layer; and a metal layer including Au, in which the metal layer serves as a first pad; a second electrode on the second surface of the GaN layer; and a second pad on the second electrode, in which a thickness of the second pad is about 0.5 &#x3bc;m or higher.

A vertical light emitting diode structure, comprising: a support structure including a support substrate and a metallic layer, the metallic layer being disposed on the support substrate; a GaN-based semiconductor structure including a first-type semiconductor layer on the support structure, an active layer on the first-type semiconductor layer, and a second-type semiconductor layer on the active layer, the GaN-based semiconductor structure including a bottom surface proximate to the support structure, a top surface opposite to the bottom surface, and a side surface between the top surface and the bottom surface, a thickness of the GaN-based semiconductor structure from the bottom surface to the top surface being less than 5 micro meters, and a ratio of a thickness of the second-type semiconductor layer to the thickness of the GaN-based semiconductor structure being not less than 60%; a first contact layer disposed between the support structure and the GaN-based semiconductor structure to be electrically connected to the first-type semiconductor layer, a thickness of the first contact layer being less than the thickness of the first-type semiconductor layer; a second contact layer disposed on the GaN-based semiconductor structure to be electrically connected to the second-type semiconductor layer, the second contact layer including titanium and aluminum; a metal pad disposed on the second contact layer, the metal pad including gold; and a passivation layer being in contact with the support structure, the passivation layer extending from the support structure to the top surface of the GaN-based semiconductor structure via the side surface of the GaN-based semiconductor structure.

Growing community of inventors

Pleasanton, CA, United States of America

Myung Cheol Yoo