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    • 1. 发明授权
    • Method and kit for growing cross-shaped crystals
    • 生长十字形晶体的方法和试剂盒
    • US06793732B1
    • 2004-09-21
    • US10060928
    • 2002-01-29
    • Stacy Williams
    • Stacy Williams
    • C30B2504
    • C30B29/12C30B5/00C30B29/56
    • The present invention provides a method for growing crystals in a gel matrix by reacting tartrate anions with cations, the cations selected from the group consisting of K+, Ca2+, Na+, Mg2+ and Li+. A method particularly adapted for crowing cross-shaped crystals includes forming a gel matrix through cooling of a mixture of potassium bitartrate, boiling water and gelatin to less than 65° F. until the matrix solidifies, adding calcium chloride to the gel matrix to react the calcium chloride with the potassium bitartrate at a temperature of preferably less than 65° F. until crystals form, and separating cross-shaped crystals that have reached a desired size from the gel matrix by warming the gel to a liquid state and removing the crystals.
    • 本发明提供了一种通过使酒石酸盐阴离子与阳离子反应而在凝胶基质中生长晶体的方法,所述阳离子选自K +,Ca 2+,Na +,Mg 2+和 李+。 特别适于挤压十字形晶体的方法包括通过将酒石酸钾,沸水和明胶的混合物冷却至小于65°F形成凝胶基质,直到基体固化,向凝胶基质中加入氯化钙 氯化钾与酒石酸钾在优选低于65°F的温度下反应,直至形成晶体,并且通过将凝胶升温至液体状态并除去晶体,从凝胶基质中分离已达到所需尺寸的十字形晶体。
    • 3. 发明授权
    • Method for improving CVD film quality utilizing polysilicon getterer
    • 利用多晶硅吸收器提高CVD膜质量的方法
    • US06749684B1
    • 2004-06-15
    • US10250181
    • 2003-06-10
    • Huajie ChenDan MocutaRichard J. MurphyPaul RonsheimDavid Rockwell
    • Huajie ChenDan MocutaRichard J. MurphyPaul RonsheimDavid Rockwell
    • C30B2504
    • C30B29/06C30B25/02C30B29/08C30B29/52
    • A method is disclosed for forming an epitaxial layer on a front side of a substrate formed of a monocrystalline material, using a chemical vapor deposition system. In this method, a plurality of gettering wafers formed of a gettering material are arranged in the CVD system, such that the front side of each substrate is facing one of the gettering wafers. Impurities present in the CVD system during formation of the epitaxial layer are gettered by the gettering wafers. Alternatively, a layer of a gettering material is deposited on a back side of each of the plurality of substrates, and the substrates are arranged such that the front side of each substrate is facing the backside of another of the substrates. In another embodiment, a layer of a gettering material is deposited on an interior surface of the CVD system. Impurities removed from the CVD system during epitaxial formation include oxygen, water vapor and other oxygen-containing contaminants.
    • 公开了一种使用化学气相沉积系统在由单晶材料形成的基板的正面上形成外延层的方法。 在该方法中,在CVD系统中配置由吸气材料形成的多个吸气晶片,使得每个基板的前侧面对吸气晶片之一。 在形成外延层期间存在于CVD系统中的杂质被吸杂晶片吸收。 或者,在多个基板的每一个的背面上沉积吸气材料层,并且将基板布置成使得每个基板的前侧面对另一个基板的背面。 在另一个实施例中,吸气材料层沉积在CVD系统的内表面上。 在外延形成期间从CVD系统中除去的杂质包括氧,水蒸气和其它含氧污染物。
    • 5. 发明授权
    • Axial gradient transport apparatus and process
    • 轴向梯度输送装置及工艺
    • US06800136B2
    • 2004-10-05
    • US10221426
    • 2002-09-11
    • David W. SnyderWilliam J. Everson
    • David W. SnyderWilliam J. Everson
    • C30B2504
    • C30B23/06C30B23/00C30B23/002C30B29/36C30B35/00Y10T117/1032
    • Disclosed is an apparatus and a method for growing single crystals of materials such as silicon carbide through axial gradient transport. A source of the material (10) is placed at one end of a reaction chamber (2) opposite a seed crystal (13). Separate heating elements (16 and 60; 20 and 62) are positioned at opposite ends of the reaction chamber. The reaction chamber (2) is placed in a growth chamber (26). By appropriately controlling the pressure in the growth chamber (26) and the temperature of the heating elements (16, 20), including the temperature differential therebetween, a uniaxial temperature gradient is generated in the reaction chamber (2). In this manner, planar isotherms are generated and a high quality crystal can be grown through a physical vapor transport process.
    • 公开了一种用于通过轴向梯度输送生长单晶材料如碳化硅的装置和方法。 材料源(10)放置在与晶种(13)相对的反应室(2)的一端。 单独的加热元件(16和60; 20和62)位于反应室的相对端。 将反应室(2)放置在生长室(26)中。 通过适当地控制生长室(26)中的真空度和包括它们之间的温差的加热元件(16,20)的温度,在反应室(2)中产生单轴温度梯度。 以这种方式,产生平面等温线,并且可以通过物理蒸气传输过程生长高质量的晶体。
    • 7. 发明授权
    • Single step process for epitaxial lateral overgrowth of nitride based materials
    • 用于氮化物基材料外延横向过度生长的单步法
    • US06478871B1
    • 2002-11-12
    • US09676938
    • 2000-10-02
    • James R. ShealyJoseph A. Smart
    • James R. ShealyJoseph A. Smart
    • C30B2504
    • C30B25/02C30B29/403C30B29/406H01L21/02378H01L21/0242H01L21/02458H01L21/0254H01L21/0262H01L21/02639H01L21/02647
    • An epitaxial deposition process produces epitaxial lateral overgrowth (ELO) of nitride based materials directly a patterned substrate (10). The substrate (10) is preferably formed from SiC or sapphire, and is patterned with a mask (12), preferably formed of silicon nitride, having a plurality of openings (13) formed therein. A nucleation layer (14), preferably formed of AlGaN, is grown at a high reactor temperature of 700-1100 degrees C., which wets the exposed substrate surface, without significant nucleation on the mask (12). This eliminates the need for regrowth while producing smooth growth surfaces in the window openings (13) as well as over the mask (12). Subsequent deposition of a nitride based material layer (16), preferably GaN, results in a relatively defect free planar surfaced material grown laterally over the mask (12).
    • 外延沉积工艺直接对图案化的衬底(10)产生氮化物基材料的外延横向过度生长(ELO)。 衬底(10)优选地由SiC或蓝宝石形成,并且用在其中形成有多个开口(13)的掩模(12)图案化,优选由氮化硅形成。 优选由AlGaN形成的成核层(14)在700-1100℃的高反应器温度下生长,其在暴露的基底表面上润湿,而在掩模(12)上没有显着的成核。 这消除了在窗口(13)中以及面罩(12)上方产生光滑生长表面的同时需要再生长。 随后沉积氮化物基材料层(16),优选GaN,导致在掩模(12)上横向生长的相对缺陷的平坦表面材料。