摘要:
A light-emitting diode (LED) device is provided. The LED device has raised semiconductor regions formed on a substrate. LED structures are formed over the raised semiconductor regions such that bottom contact layers and active layers of the LED device are conformal layers. The top contact layer has a planar surface. In an embodiment, the top contact layers are continuous over a plurality of the raised semiconductor regions while the bottom contact layers and the active layers are discontinuous between adjacent raised semiconductor regions.
摘要:
A structure and method for a light-emitting diode are presented. A preferred embodiment comprises a substrate with a conductive, poly-crystalline, silicon-containing layer over the substrate. A first contact layer is epitaxially grown, using the conductive, poly-crystalline, silicon-containing layer as a nucleation layer. An active layer is formed over the first contact layer, and a second contact layer is formed over the active layer.
摘要:
A circuit structure includes a substrate; a patterned mask layer over the substrate, wherein the patterned mask layer includes a plurality of gaps; and a group-III group-V (III-V) compound semiconductor layer. The III-V compound semiconductor layer includes a first portion over the mask layer and second portions in the gaps, wherein the III-V compound semiconductor layer overlies a buffer/nucleation layer.
摘要:
A light-emitting diode (LED) device is provided. The LED device has a substrate, a reflective structure over the substrate, and an LED structure over the reflective structure. The reflective structure is formed of non-metallic materials. In one embodiment, the reflective structure is formed of alternating layers of different non-metallic materials having different refractive indices. In another embodiment, the reflective structure is formed of alternating layers of high-porosity silicon and low-porosity silicon. In yet another embodiment, the reflective structure is formed of silicon dioxide, which may allow the use of fewer layers. The reflective structure may be formed directly on the same substrate as the LED structure or formed on a separate substrate and then bonded to the LED structure.
摘要:
A method of forming a light-emitting diode (LED) device and separating the LED device from a growth substrate is provided. The LED device is formed by forming an LED structure over a growth substrate. The method includes forming and patterning a mask layer on the growth substrate. A first contact layer is formed over the patterned mask layer with an air bridge between the first contact layer and the patterned mask layer. The first contact layer may be a contact layer of the LED structure. After the formation of the LED structure, the growth substrate is detached from the LED structure along the air bridge.
摘要:
A semiconductor device includes a silicon substrate; silicon faceted structures formed on a top surface of the silicon substrate; and a group-III nitride layer over the silicon faceted structures. The silicon faceted structures are separated from each other, and have a repeated pattern.
摘要:
A circuit structure includes a substrate and a film over the substrate and including a plurality of portions allocated as a plurality of rows. Each of the plurality of rows of the plurality of portions includes a plurality of convex portions and a plurality of concave portions. In each of the plurality of rows, the plurality of convex portions and the plurality of concave portions are allocated in an alternating pattern.
摘要:
A circuit structure includes a carrier substrate, which includes a first through-via and a second through-via. Each of the first through-via and the second through-via extends from a first surface of the carrier substrate to a second surface of the carrier substrate opposite the first surface. The circuit structure further includes a light-emitting diode (LED) chip bonded onto the first surface of the carrier substrate. The LED chip includes a first electrode and a second electrode connected to the first through-via and the second through-via, respectively.
摘要:
A semiconductor device includes a silicon substrate; silicon faceted structures formed on a top surface of the silicon substrate; and a group-III nitride layer over the silicon faceted structures. The silicon faceted structures are separated from each other, and have a repeated pattern.
摘要:
A method for forming a semiconductor structure includes providing a semiconductor substrate including a first region and a second region; and forming a first and a second metal-oxide-semiconductor (MOS) device. The step of forming the first MOS device includes forming a first silicon germanium layer over the first region of the semiconductor substrate; forming a silicon layer over the first silicon germanium layer; forming a first gate dielectric layer over the silicon layer; and patterning the first gate dielectric layer to form a first gate dielectric. The step of forming the second MOS device includes forming a second silicon germanium layer over the second region of the semiconductor substrate; forming a second gate dielectric layer over the second silicon germanium layer with no substantially pure silicon layer therebetween; and patterning the second gate dielectric layer to form a second gate dielectric.