摘要:
A method for making a free-standing, single crystal, aluminum gallium nitride (AlGaN) wafer includes forming a single crystal AlGaN layer directly on a single crystal LiAlO2 substrate using an aluminum halide reactant gas, a gallium halide reactant gas, and removing the single crystal LiAlO2 substrate from the single crystal AlGaN layer to make the free-standing, single crystal AlGaN wafer. Forming the single crystal AlGaN layer may comprise depositing AlGaN by vapor phase epitaxy (VPE) using aluminum and gallium halide reactant gases and a nitrogen-containing reactant gas. The growth of the AlGaN layer using VPE provides commercially acceptable rapid growth rates. In addition, the AlGaN layer can be devoid of carbon throughout. Because the AlGaN layer produced is high quality single crystal, it may have a defect density of less than about 107cm−2.
摘要:
A method for making a free-standing, single crystal, aluminum gallium nitride (AlGaN) wafer includes forming a single crystal AlGaN layer directly on a single crystal LiAlO2 substrate using an aluminum halide reactant gas, a gallium halide reactant gas, and removing the single crystal LiAlO2 substrate from the single crystal AlGaN layer to make the free-standing, single crystal AlGaN wafer. Forming the single crystal AlGaN layer may comprise depositing AlGaN by vapor phase epitaxy (VPE) using aluminum and gallium halide reactant gases and a nitrogen-containing reactant gas. The growth of the AlGaN layer using VPE provides commercially acceptable rapid growth rates. In addition, the AlGaN layer can be devoid of carbon throughout. Because the AlGaN layer produced is high quality single crystal, it may have a defect density of less than about 107 cm−2.
摘要翻译:制造独立的单晶,氮化镓铝(AlGaN)晶片的方法包括:使用卤化铝反应物气体,镓(AlGaN)形成直接在单晶LiAl 2 O 3衬底上的单晶AlGaN层 卤化物反应物气体,并从单晶AlGaN层除去单晶LiAlO 2衬底以制造独立的单晶AlGaN晶片。 形成单晶AlGaN层可以包括使用铝和卤化镓反应物气体和含氮反应气体通过气相外延(VPE)沉积AlGaN。 使用VPE的AlGaN层的生长提供商业上可接受的快速生长速率。 此外,AlGaN层整体上不含碳。 因为所生产的AlGaN层是高质量的单晶,所以它的缺陷密度可能小于约10 -7 cm -2。
摘要:
Embodiments of the invention provide an electronic device, such as a laptop PC, with a keyboard having specialized keys. The specialized keys according to embodiments of the invention are chamfer-less, configured with a larger, “D” shaped striking surface having a concavity therein.
摘要:
The invention provides large, vertically elongated keyboard keys strategically chosen and positioned above the alphanumeric section of a standard keyboard (e.g. a laptop PC keyboard) to provide a more ergonomic keyboard arrangement. The invention provides for keys that appropriately address the needs of touch typists when striking frequently used keys located above the alphanumeric section of the keyboard.
摘要:
The present invention provides a method of treating a mammal with age-related macular degeneration (AMD) comprising administering a dosage of at least one of prostaglandin E1 (PGE1), papaverine, and an alpha-1-vasodilator, in a pharmaceutically acceptable carrier for a period of time effective to deliver a dosage effective to treat said AMD.
摘要:
A system and process for treating ballast water within an ocean going vessel by generating hypochlorite for treating the ballast water. The system comprises one or more hypochlorite electrolytic cells in fluid communication with ballast water. The total organic carbon content of the ballast water is ascertained and the amount of hypochlorite generated is modulated in response to the total organic carbon content of the ballast water. In one embodiment the system comprises a total organic carbon analyzer for measuring total organic carbon content.In one embodiment of the process of the invention, hypochlorite production is modulated so that the residual halogen-containing oxidizing agent is maintained in the ballast water. In another embodiment of the process, hypochlorite production is modulated to maintain a weight ratio of hypochlorite to total organic carbon in the ballast water ranging from about 1.0 to about 3.0.