Reverse Partial Etching Scheme for Magnetic Device Applications
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    发明申请
    Reverse Partial Etching Scheme for Magnetic Device Applications 有权
    磁性器件应用的反向部分蚀刻方案

    公开(公告)号:US20130244342A1

    公开(公告)日:2013-09-19

    申请号:US13419507

    申请日:2012-03-14

    IPC分类号: H01L21/8246

    CPC分类号: H01L43/12 H01L27/222

    摘要: A magnetic tunnel junction (MTJ) structure is provided over a device wherein the MTJ comprises a tunnel barrier layer between a free layer and a pinned layer; and a top and bottom electrode inside the MTJ structure. A hard mask layer is formed on the top electrode. The hard mask layer, top electrode, free layer, tunnel barrier layer, and pinned layer are patterned to define the magnetic tunnel junction (MTJ) structures. A first dielectric layer is deposited over the MTJ structures and planarized to expose the top electrode. Thereafter, the top electrode and free layer are patterned. A second dielectric layer is deposited over the MTJ structures and planarized to expose the top electrode. A third dielectric layer is deposited over the MTJ structures and a metal line contact is formed through the third dielectric layer to the top electrode to complete fabrication of the magnetic device.

    摘要翻译: 在一个器件上提供一个磁性隧道结(MTJ)结构,其中MTJ包括在自由层和钉扎层之间的隧道势垒层; 以及MTJ结构内的顶部和底部电极。 在顶部电极上形成硬掩模层。 将硬掩模层,顶电极,自由层,隧道势垒层和钉扎层图案化以限定磁隧道结(MTJ)结构。 第一电介质层沉积在MTJ结构上并且被平坦化以暴露顶部电极。 此后,对顶部电极和自由层进行图案化。 第二电介质层沉积在MTJ结构上并且被平坦化以暴露顶部电极。 在MTJ结构上沉积第三电介质层,并且通过第三电介质层形成金属线接触到顶部电极以完成磁性器件的制造。