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    • 76. 发明公开
    • III-GROUP NITRIDE SINGLE-CRYSTAL INGOT, III-GROUP NITRIDE SINGLE-CRYSTAL SUBSTRATE, METHOD FOR MANUFACTURING III-GROUP NITRIDE SINGLE-CRYSTAL INGOT, AND METHOD FOR MANUFACTURING III-GROUP NITRIDE SINGLE-CRYSTAL SUBSTRATE
    • III族氮化物单晶锭,Ⅲ族氮化物晶体衬底,用于生产III族氮化物单晶锭AND METHOD FOR PRODUCING III族氮化物晶体衬底
    • EP2246462A1
    • 2010-11-03
    • EP08871801.0
    • 2008-12-24
    • Sumitomo Electric Industries, Ltd.
    • OKAHISA, TakujiNAKAHATA, SeijiUEMURA, Tomoki
    • C30B29/38C23C16/34C30B25/18
    • C30B29/403C30B25/02C30B29/406C30B33/12
    • Affords Group-III nitride single-crystal ingots and III-nitride single-crystal substrates manufactured utilizing the ingots, as well as methods of manufacturing III-nitride single-crystal ingots and methods of manufacturing III-nitride single-crystal substrates, wherein the incidence of cracking during length-extending growth is reduced. Characterized by including a step of etching the edge surface of a base substrate, and a step of epitaxially growing onto the base substrate hexagonal-system III-nitride monocrystal having crystallographic planes on its side surfaces. In order to reduce occurrences of cracking during length-extending growth of the ingot, depositing-out of polycrystal and out-of-plane oriented crystal onto the periphery of the monocrystal must be controlled. A layer of the base substrate edge surface, as just described, where it has been mechanically altered is removed beforehand by etching, whereby crystallographic planes form on the side surfaces of the III-nitride single-crystal ingot that is formed onto the base substrate, which therefore controls depositing-out of polycrystal and out-of-plane oriented crystal and reduces occurrences of cracking.
    • 得到III族氮化物单晶锭,Ⅲ族氮化物单晶衬底制造利用铸锭,以及制造III族氮化物单晶锭的方法及制造III族氮化物单晶衬底的方法,worin发病 时的裂纹的长度延伸的生长减少。 通过包括蚀刻基底基板的边缘表面的步骤,和外延生长在基体基板六方晶系III族氮化物单晶具有在​​其侧表面的结晶学平面的工序为特征。 为了减少锭的长度延伸的生长过程中裂纹发生率,多晶的沉积出和外的面取向的晶体走上单晶的周边必须控制。 基础基板的边缘表面的层,如刚刚描述的,在那里它已经被机械改变被去除预先通过蚀刻,由此晶面的III族氮化物单晶锭的侧面上形成并形成到基础基板, 其因此控制存入出多晶的和出不同面取向的晶体并减少裂纹的发生。