| 申请日期 | 2025-06-27 | 申请号 | JP2008041944 |
| 公开（公告）号 | JP2009200350A | 公开（公告）日 | 2009-09-03 |
| 公开国别 | JP | 申请人省市代码 | 全国 |
| 申请人 | HITACHI CHEMICAL CO LTD | ||
| 简介 | PROBLEM TO BE SOLVED : To provide a varnish of a fluorinated polyimide precursor, to which rare earth metal ions are added with high concentration, and to provide an optical waveguide amplifier using the same. SOLUTION : A material for optical doping is obtained by mixing salt of rare earth metal and a carboxylic acid compound or phenol compound in an organic solvent, and the varnish contains the fluorinated polyimide precursor. COPYRIGHT : (C)2009, JPO&INPIT | ||
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