Abstract:
A substrate for light-emitting diode (LED) has a top surface being divided into a plurality of first units and a plurality of second units. The first units respectively have a plurality of first microstructures, and the second units respectively have a plurality of second microstructures different from the first microstructures of the first units. Any two adjacent ones of the first units have one second unit located therebetween, while the second units are located around each of the first units. The second units are micro-roughened surfaces that have a relatively small average height difference between tops and bottoms thereof, allowing bridging structures formed on the second units to have bottom portions with uniform thickness, which in turn enables increased good yield of LED production.
Abstract:
A method for bonding a semiconductor structure with a substrate and a high efficiency photonic device manufactured by using the same method are disclosed. The method comprises steps of: providing a semiconductor structure and a substrate; forming a composite bonding layer on the semiconductor structure; and bonding the substrate with the composite bonding layer on the semiconductor structure to form a composite alloyed bonding layer. The semiconductor structure includes a compound semiconductor substrate and a high efficiency photonic device is produced after the compound semiconductor substrate is removed. Besides, the composite bonding layer can be formed on the substrate or formed on both the semiconductor structure and substrate simultaneously.
Abstract:
A light-emitting diode includes a first electrode, a conductive substrate layer, a reflective layer, a first electrical semiconductor layer, a active layer, a second electrical semiconductor layer, and at least one second electrode. The conductive substrate layer is formed on the first electrode. The reflective layer is formed on the conductive substrate layer. The first electrical semiconductor layer is formed on the reflective layer. The active layer is formed on the first electrical semiconductor layer. The second electrical semiconductor layer is formed on the active layer. The at least one second electrode is formed on the second electrical semiconductor layer. At least one third electrode is additionally disposed under the second electrical semiconductor layer. At least one connection channel is disposed between the second electrode and the third electrode, so that the second electrode and the third electrode are electrically connected.