磁控溅射是一种能够在低温条件下生长大面积优质薄膜的工艺,广泛用在磁传感器和存储等领域.本文研究了在巨磁电阻(Giant Magneto Resistance:GMR)多层膜周围溅射接触紧密的CoCrPt硬磁膜的工艺,使得硬磁膜能为GMR提供磁场偏置,以解决小尺度GMR的噪声问题.研究中采用了1:5的BHF溶液的湿法刻蚀工艺,刻蚀速率为25 A/s,实现了刻蚀深度的精确控制,解决了薄膜对准的问题.同时改进了CoCrPt薄膜溅射的种子层,使得CoCrPt能在常温下溅射得到很好的晶体结构.这种工艺为基于GMR的小尺寸器件设计提供了可能性.
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