申请日期 | 2025-07-18 | 申请号 | US15329478 |
公开(公告)号 | US20170211204A1 | 公开(公告)日 | 2017-07-27 |
公开国别 | US | 申请人省市代码 | 全国 |
申请人 | TDK CORPORATION | ||
简介 | An alumina substrate wherein an AlN layer is formed on a surface of the alumina substrate and a rare earth elements-containing layer and/or rare earth elements-containing regions is/are formed in the interior of the AlN layer or in the interface between the AlN layer and the alumina substrate. |
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