发明名称 |
OPTICAL MEMBER FOR DEEP ULTRAVIOLET AND PROCESS FOR PRODUCING SAME |
摘要 |
The present invention relates to an optical member for deep ultraviolet having a wavelength of 250 nm or shorter, containing a synthetic silica glass which does not substantially contain a halogen element, has a maximum OH group content of less than 10 ppm by weight, has contents of ODC (oxygen deficient centers) and E-prime center of each less than 1×10 14 cm -3 , does not substantially contain SiH and peroxy linkage, and has a fictive temperature of 1,050°C or lower. |
申请公布号 |
EP2495220(B1) |
申请公布日期 |
2016.07.06 |
申请号 |
EP20100826742 |
申请日期 |
2010.10.26 |
申请人 |
ASAHI GLASS COMPANY, LIMITED |
发明人 |
MORITA, RYUSUKE;NAKAGAWA, TAKUYA;IWATA, KEI;TAKATA, MASAAKI |
分类号 |
C03B20/00;C03B8/04;C03C3/06;C03C4/00;G02B1/02;G03F7/20;H01L21/027 |
主分类号 |
C03B20/00 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|