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公开(公告)号:US20120289126A1
公开(公告)日:2012-11-15
申请号:US13472179
申请日:2012-05-15
申请人: Brahmanandam V. Tanikella , Palaniappan Chinnakaruppan , Robert A. Rizzuto , Isaac K. Cherian , Ramanujam Veddantham
发明人: Brahmanandam V. Tanikella , Palaniappan Chinnakaruppan , Robert A. Rizzuto , Isaac K. Cherian , Ramanujam Veddantham
IPC分类号: B24B1/00
CPC分类号: C30B29/20 , B24B7/228 , B24B27/0633 , B24D3/06 , B24D5/06 , H01L21/0242 , H01L23/15 , H01L2924/0002 , H04L29/12028 , H04L29/12594 , H04L61/103 , H04L61/3065 , H04L67/327 , Y10T428/21 , Y10T428/24355 , H01L2924/00
摘要: A sapphire substrate includes a generally planar surface having a crystallographic orientation selected from the group consisting of a-plane, r-plane, m-plane, and c-plane orientations, and having a nTTV of not greater than about 0.037 μm/cm2, wherein nTTV is total thickness variation normalized for surface area of the generally planar surface, the substrate having a diameter not less than about 9.0 cm.
摘要翻译: 蓝宝石衬底包括具有选自由a面,r面,m面和c面取向组成的组的结晶取向并且具有不大于约0.037μm/ cm 2的nTTV的大致平坦表面, 其中nTTV是对于大致平坦的表面的表面积进行标准化的总厚度变化,所述基底的直径不小于约9.0cm。
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公开(公告)号:US20080166951A1
公开(公告)日:2008-07-10
申请号:US11963454
申请日:2007-12-21
申请人: Brahmanandam V. Tanikella , Palaniappan Chinnakaruppan , Robert A. Rizzuto , Isaac K. Cherian , Ramanujam Vedantham
发明人: Brahmanandam V. Tanikella , Palaniappan Chinnakaruppan , Robert A. Rizzuto , Isaac K. Cherian , Ramanujam Vedantham
摘要: A sapphire substrate includes a generally planar surface having a crystallographic orientation selected from the group consisting of a-plane, r-plane, m-plane, and c-plane orientations, and having a nTTV of not greater than about 0.037 μm/cm2, wherein nTTV is total thickness variation normalized for surface area of the generally planar surface, the substrate having a diameter not less than about 9.0 cm.
摘要翻译: 蓝宝石衬底包括具有选自由a面,r面,m面和c面取向组成的组的晶体取向的大致平坦的表面,并且具有不大于约0.037μm/ cm 3的nTTV, SUP> 2,其中nTTV是对于大体上平坦的表面的表面积归一化的总厚度变化,所述基底具有不小于约9.0cm的直径。
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公开(公告)号:US06238450B1
公开(公告)日:2001-05-29
申请号:US09553968
申请日:2000-04-21
IPC分类号: C04B3550
CPC分类号: C01F17/0043 , C01P2004/01 , C01P2004/03 , C01P2004/62 , C01P2006/12 , C09K3/1463 , H01L21/30625
摘要: A polishing slurry, useful in optical or CMP applications, comprises a ceria with a BET surface area of at least 10 m2/gm. The slurry may be made by subjecting a commercial ceria slurry comprising agglomerates to a mechano-chemical treatment at a pH of from 9 to 11 using media that are low purity alpha alumina or zirconia. Preferred slurries maintain a positive surface charge at all pH values. CMP slurries preferably comprise in addition an anionic surfactant to aid in removal of surface residues.
摘要翻译: 可用于光学或CMP应用的抛光浆料包含BET表面积至少为10m 2 / gm的二氧化铈。 可以通过使用低纯度α氧化铝或氧化锆的介质,使包含附聚物的商业二氧化铈浆料在pH为9至11的机械化学处理下进行制备浆料。 优选的浆料在所有pH值下保持正表面电荷。 CMP浆料优选还包含阴离子表面活性剂以帮助除去表面残留物。
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