发明名称 |
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 |
摘要 |
<p>Provided are a III-group nitride single-crystal ingot reduced in a cracking percentage at a long-growing time, a III-group nitride single-crystal substrate manufactured by using the ingot, a method for manufacturing the III-group nitride single-crystal ingot, and a method for manufacturing the III-group nitride single-crystal substrate. The manufacturing method is characterized by comprising a step of etching the side face of a backing substrate, and a step of epitaxially-growing a III-group nitride single-crystal of a hexagonal system having crystal faces on the side faces, over a backing substrate. For reducing the cracking at the long growing time of the ingot, it is necessary to suppress the deposition of a polycrystal or a different-plane orientation crystal on the periphery of the single crystal. By etching off the processing-degenerated layer in advance from the side face of the backing substrate, as described above, a crystal plane is formed on the side face of the III-group nitride single-crystal ingot formed on the backing substrate, so that the deposition of the polycrystal or the different-plane orientation crystal is suppressed to reduce the cracking.</p> |
申请公布号 |
WO2009096125(A1) |
申请公布日期 |
2009.08.06 |
申请号 |
WO2008JP73368 |
申请日期 |
2008.12.24 |
申请人 |
SUMITOMO ELECTRIC INDUSTRIES, LTD.;OKAHISA, TAKUJI;NAKAHATA, SEIJI;UEMURA, TOMOKI |
发明人 |
OKAHISA, TAKUJI;NAKAHATA, SEIJI;UEMURA, TOMOKI |
分类号 |
C30B29/38;C23C16/34;C30B25/18 |
主分类号 |
C30B29/38 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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