对d为300 mm blanket铜膜进行了低压低浓度化学机械抛光实验,分析了抛光工艺参数和抛光液组分对铜膜去除速率及其非均匀性的影响.通过实验表明,当抛光压力为13.780kPa,抛光液流量为175 mL/min,抛光机转速为65 r/min,0.5%磨料,0.5%氧化剂,7%鳌合剂,铜膜去除速率为1 120 nm/min,片内速率非均匀性为0.059,抛光后铜膜表面粗糙度大幅度下降,表面状态得到显著改善.
参考文献
[1] | Christopher M Sulyma,Dipankar R .Electrochemical characterization of surface complexes formed on Cu and Ta in succinic acid based solutions used for chemical mechanical planarization[J].Applied Surface Science,2010,256 |
[2] | Oh S,Seok J .An Integrated Material Removal Model for Silicon Dioxide Layers in Chemical Mechanical Polishing Processes[J].Wear,2009,266:839-849.,2009. |
[3] | Tsai T C,Tsao W C,Lin W,et al .CMP process development for the via-middle 3D TSV apphcations at 28 nm technology node[J].Microeletronic Engineering,2012,92(3):29-33.,2012. |
[4] | 刘玉岭,檀柏梅,张楷亮.微电子技术工程[M].北京:电子工业出版社,2004:420-567.,2004. |
[5] | Zheng J P,Roy D .Electrochemical Examination of Surface Films Formed During Chemical Mechanical Planarization of Copper in Acetic Acid and Dodecyl Sulfate Solutions[J].Thin Solid Films,2009,517(16):4587-4592.,2009. |
[6] | Yang J C,Oh D W,Lee G W,et al .Step Height Removal Mechanism of Chemical Mechanical Planarization (CMP) for Sub-Nano-Surface Finish[J].Wear,2010,268:505-510.,2010. |
[7] | 王新,刘玉岭,王弘英.Cu-CMP中磨料粒子的机械作用实验分析[J].电子器件,2002(03):220-223. |
[8] | 张楷亮,宋志棠,张建新,檀柏梅,刘玉岭.ULSI介质CMP用大粒径硅溶胶纳米研磨料的合成及应用研究[J].电子器件,2004(04):556-558,563. |
[9] | 张磊,汪海波,张泽芳,王良咏,刘卫丽,宋志棠.一种新型复合磨料对铜的化学机械抛光研究[J].功能材料与器件学报,2011(05):520-525. |
[10] | Lei H,Luo J J .CMP of hard disk substrate using a colloidal SiO2 slurry:pr eliminary experimental investigation[J].Wear,2004,257:461-470.,2004. |
[11] | Kristin G,Shattuck,Jeng Yu Lin,et al .Characterization of phosphate electrolytes for use in Cu electrochemical mechanical planarization[J].Electrochemical Acta,2008,53 |
[12] | Noh K,Saka N,Chun J H .Effect of Slurry Selectivity on Dielectric Erosion and Copper Dishing in Copper Chemical-Mechanical Polishing[J].CIRP Annals-Manufacturing Technology,2004,53(1):463-466.,2004. |
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