磁性复合流体对砷化镓晶片的超精密表面抛光(英文)

被引:0
|
作者
王有良 [1 ]
梁博 [1 ]
张文娟 [2 ]
机构
[1] 兰州理工大学机电工程学院
[2] 兰州理工大学省部共建有色金属先进加工与再利用国家重点实验室
关键词
磁性复合流体; 砷化镓晶片; 抛光; 表面粗糙度; 材料去除;
D O I
暂无
中图分类号
TG664 [高速流体加工设备及其加工];
学科分类号
摘要
研究了磁性复合流体(MCF)浆料对砷化镓(Ga As)晶片表面纳米精密抛光的影响。通过混合CS羰基铁颗粒(CIPs)、Al2O3磨料颗粒、α-纤维素和磁性流体制备MCF浆料。首先,通过设计用于产生旋转磁场的MCF单元,建立了抛光装置。然后,对Ga As晶片表面进行了点抛光实验,以阐明MCF成分对不同抛光位置的表面粗糙度Ra和材料去除(MR)的影响。最后,使用含有不同直径颗粒的水基MCF浆料进行了扫描抛光实验。结果表明,在点抛光的情况下,水基和油基MCF处理后的初始表面粗糙度从954.07 nm分别降至1.02和20.06 nm。此外,MR的深度随着抛光时间的增加而线性增加。使用水基MCF的MR深度是使用油基MCF抛光的2.5倍。同时,抛光区的横截面轮廓显示出W型,这表明点抛光工件表面的MR不均匀。通过扫描抛光,抛光区的横截面轮廓显示出U型,这表明在给定的实验条件下,无论使用何种MCF,MR都是均匀的。使用含有直径为0.3μm的磨粒的MCF能够获得Ra为0.82 nm的最光滑工作表面,同时MR速率为13.5μm/h。
引用
收藏
页码:377 / 385
页数:9
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