摘要:
A method of forming a SiGe layer having a relatively high germanium content and a relatively low threading dislocation density includes preparing a silicon substrate; depositing a layer of SiGe to a thickness of between about 100 nm to 500 nm, wherein the germanium content of the SiGe layer is greater than 20%, by atomic ratio; implanting H+ ions into the SiGe layer at a dose of between about 1·1016 cm−2 to 5·1016 cm−2, at an energy of between about 20 keV to 45 keV; patterning the SiGe layer with photoresist; plasma etching the structure to form trenches about regions; removing the photoresist; and thermal annealing the substrate and SiGe layer, to relax the SiGe layer, in an inert atmosphere at a temperature of between about 650° C. to 950° C. for between about 30 seconds and 30 minutes.
摘要:
An array of submicron silicon (Si) tubes is provided with a method for patterning submicron Si tubes. The method provides a Si substrate, and forms a silicon dioxide film overlying the Si substrate. An array of silicon dioxide rods is formed from the silicon dioxide film, and Si3N4 tubes are formed surrounding the silicon dioxide rods. The silicon dioxide rods are etched away. Then, exposed regions of the Si substrate are etched, forming Si tubes underlying the Si3N4 tubes. Finally, the Si3N4 tubes are removed.
摘要翻译:亚微米硅(Si)管的阵列具有用于构图亚微米Si管的方法。 该方法提供Si衬底,并形成覆盖Si衬底的二氧化硅膜。 由二氧化硅膜形成二氧化硅棒的阵列,并且在二氧化硅棒周围形成Si 3 N 4 N 4管。 二氧化硅棒被蚀刻掉。 然后,蚀刻Si衬底的暴露区域,形成Si 3 N 4 N 4管子下面的Si管。 最后,去除Si 3 N 4 N 4管。
摘要:
An array of submicron silicon (Si) tubes is provided with a method for patterning submicron Si tubes. The method provides a Si substrate, and forms a silicon dioxide film overlying the Si substrate. An array of silicon dioxide rods is formed from the silicon dioxide film, and Si3N4 tubes are formed surrounding the silicon dioxide rods. The silicon dioxide rods are etched away. Then, exposed regions of the Si substrate are etched, forming Si tubes underlying the Si3N4 tubes. Finally, the Si3N4 tubes are removed.
摘要翻译:亚微米硅(Si)管的阵列具有用于构图亚微米Si管的方法。 该方法提供Si衬底,并形成覆盖Si衬底的二氧化硅膜。 由二氧化硅膜形成二氧化硅棒阵列,在二氧化硅棒周围形成Si 3 N 4管。 二氧化硅棒被蚀刻掉。 然后,蚀刻Si衬底的暴露区域,形成Si 3 N 4管下面的Si管。 最后,去除Si3N4管。
摘要:
A method is provided for forming a matching thermal expansion interface between silicon (Si) and gallium nitride (GaN) films. The method provides a (111) Si substrate and forms a first aluminum (Al)-containing film in compression overlying the Si substrate. Nano-column holes are formed in the first Al-containing film, which exposes regions of the underlying Si substrate. A layer of GaN layer is selectively grown from the exposed regions, covering the first Al-containing film. The GaN is grown using a lateral nanoheteroepitaxy overgrowth (LNEO) process. The above-mentioned processes are reiterated, forming a second Al-containing film in compression, forming nano-column holes in the second Al-containing film, and selectively growing a second GaN layer. Film materials such as Al2O3, Si1-xGex, InP, GaP, GaAs, AlN, AlGaN, or GaN, may be initially grown at a low temperature. By increasing the growth temperatures, a compressed layer of epitaxial GaN can be formed on a Si substrate.
摘要翻译:提供了一种在硅(Si)和氮化镓(GaN)膜之间形成匹配的热膨胀界面的方法。 该方法提供(111)Si衬底并且在压缩覆盖Si衬底上形成第一含铝(Al)的膜。 在第一含Al膜中形成纳米柱孔,其暴露下面的Si衬底的区域。 从暴露区域选择性地生长GaN层,覆盖第一含Al膜。 使用横向纳米外延生长(LNEO)工艺生长GaN。 重复上述过程,在压缩中形成第二含Al膜,在第二含Al膜中形成纳米柱孔,并选择性地生长第二GaN层。 可以最初在低温下生长诸如Al 2 O 3 3,Si 1-x Ge x,InP,GaP,GaAs,AlN,AlGaN或GaN的膜材料。 通过增加生长温度,可以在Si衬底上形成外延GaN的压缩层。
摘要:
A method of fabricating a continuous layer of a defect sensitive material on a silicon substrate includes preparing a silicon substrate; forming a nanostructure array directly on the silicon substrate; depositing a selective growth enhancing layer on the substrate; smoothing the selective growth enhancing layer; and growing a continuous layer of the defect sensitive material on the nanostructure array.
摘要:
A thermal expansion interface between silicon (Si) and gallium nitride (GaN) films using multiple buffer layers of aluminum compounds has been provided, along with an associated fabrication method. The method provides a (111) Si substrate and deposits a first layer of AlN overlying the substrate by heating the substrate to a relatively high temperature of 1000 to 1200° C. A second layer of AlN is deposited overlying the first layer of AlN at a lower temperature of 500 to 800° C. A third layer of AlN is deposited overlying the second layer of AlN by heating the substrate to the higher temperature range. Then, a grading Al1-XGaXN layer is formed overlying the third layer of AlN, where 0
摘要:
A thermal expansion interface between silicon (Si) and gallium nitride (GaN) films using multiple buffer layers of aluminum compounds has been provided, along with an associated fabrication method. The method provides a (111) Si substrate and deposits a first layer of AlN overlying the substrate by heating the substrate to a relatively high temperature of 1000 to 1200° C. A second layer of AlN is deposited overlying the first layer of AlN at a lower temperature of 500 to 800° C. A third layer of AlN is deposited overlying the second layer of AlN by heating the substrate to the higher temperature range. Then, a grading Al1-XGaXN layer is formed overlying the third layer of AlN, where 0
摘要:
A multilayer thermal expansion interface between silicon (Si) and gallium nitride (GaN) films is provided, along with an associated fabrication method. The method provides a (111) Si substrate and forms a first layer of a first film overlying the substrate. The Si substrate is heated to a temperature in the range of about 300 to 800° C., and the first layer of a second film is formed in compression overlying the first layer of the first film. Using a lateral nanoheteroepitaxy overgrowth (LNEO) process, a first GaN layer is grown overlying the first layer of second film. Then, the above-mentioned processes are repeated: forming a second layer of first film; heating the substrate to a temperature in the range of about 300 to 800° C.; forming a second layer of second film in compression; and, growing a second GaN layer using the LNEO process.
摘要:
A method is provided for forming a matching thermal expansion interface between silicon (Si) and gallium nitride (GaN) films. The method provides a (111) Si substrate that is heated to a temperature in a range of about 300 to 800° C., and a first film is formed in compression overlying the Si substrate. The first film material may be InP, SiGe, GaP, GaAs, AlN, AlGaN, an AlN/graded AlGaN (Al1−xGaxN (0
摘要:
A method of fabricating silicon nanostructures includes preparing a silicon wafer as a substrate; forming an oxide layer hardmask directly on the silicon substrate; patterning and etching the oxide hardmask; wet etching the silicon wafer to remove oxide to reduce the size of the oxide hardmask and to form nanostructure elements; and dry etching, in one or more steps, the silicon wafer using the oxide hardmask to form a desired nanostructure having substantially parallel vertical sidewalls thereon.