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公开(公告)号:US06899596B2
公开(公告)日:2005-05-31
申请号:US10121370
申请日:2002-04-12
申请人: Michael Antonell , Jennifer A. Antonell , Erik Cho Houge , Ryan Keith Maynard , Darrell L. Simpson
发明人: Michael Antonell , Jennifer A. Antonell , Erik Cho Houge , Ryan Keith Maynard , Darrell L. Simpson
IPC分类号: B24B37/04 , C09G1/02 , C09K3/14 , C09K13/00 , H01L21/304 , H01L21/306 , B24B1/00
CPC分类号: C09G1/02 , B24B37/044
摘要: A chemical mechanical polishing (CMP) process using a chemically active slurry having a polarity selected to affect the relative oxidation rates of respective crystalline planes of a polycrystalline surface being polished. The slurry polarity is controlled to equilibrate the material removal rates from the respective crystalline planes during the CMP process. A polar solute may be added to a base solvent to achieve the desired polarity. A CMP process for a tungsten film may utilize a water-based slurry containing an abrasive agent, an oxidizing agent, and a solute having a polarity less than that of water. The abrasive agent may be colloidal silica, the oxidizing agent may be hydrogen peroxide, and the solute may be benzene.
摘要翻译: 使用具有极性的化学活性浆料的化学机械抛光(CMP)方法,其选择为影响被抛光的多晶表面的各个晶面的相对氧化速率。 控制浆料极性以在CMP过程期间平衡来自相应结晶平面的材料去除速率。 可以将极性溶质加入到碱性溶剂中以获得所需的极性。 用于钨膜的CMP方法可以使用含有研磨剂,氧化剂和极性小于水的极性溶质的水基浆料。 研磨剂可以是胶体二氧化硅,氧化剂可以是过氧化氢,溶质可以是苯。