Powder metallurgy crucible for aluminum nitride crystal growth
    94.
    发明授权
    Powder metallurgy crucible for aluminum nitride crystal growth 有权
    粉末冶金坩埚用于氮化铝晶体生长

    公开(公告)号:US07211146B2

    公开(公告)日:2007-05-01

    申请号:US10822336

    申请日:2004-04-12

    IPC分类号: C30B11/06

    摘要: A crucible for growing III-nitride (e.g., aluminum nitride) single crystals is provided. The crucible includes an elongated wall structure defining an interior crystal growth cavity. Embodiments include a plurality of grains and a wall thickness of at least about 1.5 times the average grain size. In particular embodiments, the crucible includes first and second layers of grains the first layer including grains forming an inside surface thereof and the second layer being superposed with the first layer. The crucible may be fabricated from tungsten-rhenium (W—Re) alloys; rhenium (Re); tantalum monocarbide (TaC); tantalum nitride (Ta2N); hafnium nitride (HfN); a mixture of tungsten and tantalum (W—Ta); tungsten (W); and combinations thereof.

    摘要翻译: 提供了用于生长III族氮化物(例如氮化铝)单晶的坩埚。 坩埚包括限定内部晶体生长腔的细长壁结构。 实施例包括多个晶粒和至少约平均晶粒尺寸的1.5倍的壁厚。 在具体实施方案中,坩埚包括第一和第二颗粒层,第一层包括形成内表面的颗粒,第二层与第一层重叠。 坩埚可以由钨 - 铼(W-Re)合金制成; 铼(Re); 钽单体碱(TaC); 氮化钽(Ta 2 N); 氮化铪(HfN); 钨和钽的混合物(W-Ta); 钨(W); 及其组合。

    Method for polishing a substrate surface
    95.
    发明授权
    Method for polishing a substrate surface 有权
    抛光基材表面的方法

    公开(公告)号:US07037838B2

    公开(公告)日:2006-05-02

    申请号:US10300481

    申请日:2002-11-20

    IPC分类号: H01L21/302 H01L21/461

    摘要: According to one aspect of the invention, an improved process for preparing a surface of substrate is provided wherein the surface of the substrate is prepared for a chemical mechanical polishing (CMP) process, the CMP process is performed on the surface of the substrate, and the surface of the substrate is finished to clear the substrate surface of any active ingredients from the CMP process. Also, an improved substrate produced by the method is provided. According to one aspect of the invention, particular polishing materials and procedures may be used that allow for increased quality of AlN substrate surfaces.

    摘要翻译: 根据本发明的一个方面,提供了一种用于制备衬底表面的改进方法,其中衬底的表面准备用于化学机械抛光(CMP)工艺,在衬底的表面上进行CMP工艺,以及 完成基材的表面以从CMP工艺中清除任何活性成分的基材表面。 此外,提供了通过该方法制备的改进的基板。 根据本发明的一个方面,可以使用允许增加AlN衬底表面质量的特定抛光材料和程序。

    Powder metallurgy tungsten crucible for aluminum nitride crystal growth
    96.
    发明授权
    Powder metallurgy tungsten crucible for aluminum nitride crystal growth 有权
    粉末冶金钨坩埚用于氮化铝晶体生长

    公开(公告)号:US06719843B2

    公开(公告)日:2004-04-13

    申请号:US10251106

    申请日:2002-09-20

    IPC分类号: C30B1114

    摘要: A crucible for growing III-nitride (e.g., aluminum nitride) single crystals is provided. The crucible includes an elongated wall structure defining an interior crystal growth cavity. The crucible includes a plurality of tungsten grains and a wall thickness of at least about 1.5 times the average tungsten grain size. In particular embodiments, the crucible includes first and second layers of tungsten grains the first layer including grains forming an inside surface thereof and the second layer being superposed with the first layer. The crucible may be machined from a bar, plate, or billet of powder metallurgy tungsten.

    摘要翻译: 提供了用于生长III族氮化物(例如氮化铝)单晶的坩埚。 坩埚包括限定内部晶体生长腔的细长壁结构。 坩埚包括多个钨颗粒和至少约1.5倍平均钨粒度的壁厚。 在具体实施方案中,坩埚包括第一和第二层钨颗粒,第一层包括形成内表面的颗粒,第二层与第一层重叠。 坩埚可以从棒,板或粉末冶金钨的坯料加工。