Tamura Manufacturing Co., Ltd. and its subsidiary, Lightwave Corporation, have developed a white LED using bismuth oxide (β-Ga2O3) and exhibited it at the “3rd LED and Organic EL Lighting Fair in Japan†(16-18 January 2013 in Tokyo). International Exhibition Center held) on display. The LED uses a phosphor in combination with a GaN-based semiconductor blue LED chip fabricated on a β-a2O3 substrate. The selling point is that it has a feature that it is easy to increase the light output power compared with the case of using a general blue LED chip fabricated on a sapphire substrate. Tamura Manufacturing Co., Ltd. and Lightwaves displayed two white LEDs using 0.3mm square and 2mm square blue LED chips, respectively. The 0.3mm square product is a 400mA drive type, and the 2mm square product is a 6A drive type. The brightness of the 2mm square product is about 500lm, "the goal is to improve the 2000-3000lm that is difficult for a sapphire substrate type product" (narrator). Since the sapphire substrate has insulation properties, the sapphire substrate type product must adopt a lateral structure in which the anode electrode and the cathode electrode are laterally arranged. On the other hand, the β-Ga2O3 substrate has a high conductivity, so that a vertical structure in which the anode and the cathode are formed on the surface and the back of the LED chip, respectively, can be used. Compared with the lateral structure, the vertical structure can not only reduce the element resistance and thermal resistance, but also make the current distribution uniform. The smaller the component resistance and the thermal resistance, the less heat is generated by the LED chip, so it is suitable for the case of high-current driving. Although GaN substrates are also suitable for making high-power LEDs, "the cost of adopting β-Ga2O3 substrates is lower" (narrator). At present, a GaN substrate is manufactured using a vapor phase growth method called HVPE, and a β-Ga2O3 substrate is a solution growth method. In theory, the solution growth method is more suitable for improving the quality and size of the substrate. At present, the diameter of a commercially available β-Ga2O3 substrate is 2 inches. Tamura Manufacturing Co., Ltd. plans to trial production of 4-inch products in 2014 and officially launch products in 2015. In addition, it will also challenge the development of products with a 6-inch diameter.
Brass fasteners are used for their physical and aesthetic properties. Brass is utilized due to its high thermal conductivity and corrosion resistant properties, it is suitable for use in hot and cold environments, and resistant to water corrosion, making it a staple of industries such as heating and plumbing. Brass fasteners are largely non-magnetic (like any fastener, slight magnetic properties can develop during the manufacturing process) and resistant to tarnishing.
Metal Pins,Stainless Steel Pins,Flange Alignment Pin,Safety Coupler Pin Taizhou Hongchuang Hardware Co., Ltd. , https://www.taizhouhongchuang.com
Brass fasteners are suited for some marine environments, including brackish water and slow current sea water; brass in this environment develops a protective green coating. Brass fasteners are also commonly used with wood applications, as the golden coloring blends well with the tan wood. Brass is a softer metal and must be used with care, always drilling pilot holes and using driver bits that fit the head of the screw precisely to prevent stripping. Brass Bolts also require a pilot hole be driven before installtion.
Japan developed yttrium oxide substrate white LED