SUBSTRATES FOR III-NITRIDE EPITAXY
    8.
    发明申请

    公开(公告)号:US20190390365A1

    公开(公告)日:2019-12-26

    申请号:US16448178

    申请日:2019-06-21

    IPC分类号: C30B25/18 H01L21/02 C30B29/40

    摘要: A wafer suitable for epitaxial growth of gallium nitride (GaN) in a Metal Oxide Chemical Vapor Deposition (MOCVD) process. The wafer includes a silicon substrate having a front side and a back side and an edge extending between the front side and the back side, the edge including a front bevel surface connected to the front side and a back bevel surface connected to the back side, wherein the silicon substrate comprises an oxygen denuded silicon layer surrounding a core. The wafer further includes a protection layer being a thermally grown silicon oxide (SiO2) layer substantially covering the front bevel surface and the back bevel surface of the edge, while leaving at least a central region of the front side of the silicon substrate exposed, for preventing meltback during the MOCVD process.

    Method For The Production Of Polymers By Means Of Ion Exchange
    9.
    发明申请
    Method For The Production Of Polymers By Means Of Ion Exchange 审中-公开
    通过离子交换生产聚合物的方法

    公开(公告)号:US20110002862A1

    公开(公告)日:2011-01-06

    申请号:US12866289

    申请日:2009-02-05

    IPC分类号: A61K8/81 B01J47/00 A61Q1/02

    CPC分类号: C08F228/00

    摘要: The invention relates to a method for the production of polymers, comprising one or more of the recurring structural units of formula (1), where R1 is hydrogen, methyl, or ethyl, A is C1-C8-alkylene, Q+ is H+, NH4+, Na+, K+, ½ Mg++, ½ Ca++, or ½ Zn++, and where Q+ has a different meaning than H+ or NH4+ in 50 to 100 mol % of the structural units of formula (1), and one or more structural units derived from one or more further monomers, characterized in that the corresponding salts of said polymers are suspended in an organic suspension, where however the cations Q+ in the structural units of the formula (1) are NH4+ and optionally also H+, and an ion exchange is carried out by adding one or more bases comprising Na+, K+, Mg++, Ca++, or Zn++ ions.

    摘要翻译: 本发明涉及一种制备聚合物的方法,其包含一种或多种式(1)的重复结构单元,其中R 1是氢,甲基或乙基,A是C 1 -C 8亚烷基,Q +是H +,NH 4 + ,Na +,K +,½Mg ++,½Ca ++或½Zn ++,并且其中Q +在50至100mol%的式(1)的结构单元中具有与H +或NH 4 +不同的含义,以及一种或多种衍生自 一种或多种另外的单体,其特征在于所述聚合物的相应盐悬浮在有机悬浮液中,然而式(1)的结构单元中的阳离子Q +是任选地还有H +,并且还带有离子交换 通过添加一种或多种包含Na +,K +,Mg ++,Ca ++或Zn ++离子的碱。