Method for fabricating non-volatile memory device with high precision of floating gate forming

    公开(公告)号:US10157991B2

    公开(公告)日:2018-12-18

    申请号:US15875304

    申请日:2018-01-19

    Inventor: Hsing-Chih Lin

    Abstract: A method for fabricating a memory device is provided. The method for fabricating a memory device includes forming a first dielectric layer over a substrate and forming a floating gate layer over the first dielectric layer. The method further includes forming a hard mask layer over the floating gate layer and etching the hard mask layer to form a recess in the hard mask layer. The method further includes patterning a portion of the hard mask layer under the recess to form a recessed feature having a first tip corner and etching the recessed feature and the floating gate layer to form a floating gate having a second tip corner. The method further includes depositing a second dielectric layer over the floating gate and forming a control gate partially over the floating gate and separating from the floating gate by the second dielectric layer.

    Method for forming RRAM cell including V-shaped structure
    59.
    发明授权
    Method for forming RRAM cell including V-shaped structure 有权
    用于形成包括V形结构的RRAM单元的方法

    公开(公告)号:US09577189B2

    公开(公告)日:2017-02-21

    申请号:US14989495

    申请日:2016-01-06

    Inventor: Hsing-Chih Lin

    Abstract: A method of forming an RRAM cell structure is provided. The method includes forming dummy features over a substrate, and the dummy features have a gap therebetween. The method also includes depositing an oxide layer over the dummy features while forming a first V-shaped valley on the oxide layer. The method further includes partially planarizing the oxide layer while leaving the first V-shaped valley. In addition, the method includes forming a first electrode over the oxide layer while forming a second V-shaped valley on the first electrode. The method further includes forming a resistance variable layer over the first electrode in a conformal manner. The method still includes forming a second electrode over the resistance variable layer.

    Abstract translation: 提供了形成RRAM单元结构的方法。 该方法包括在衬底上形成虚拟特征,并且虚拟特征在它们之间具有间隙。 该方法还包括在虚拟特征上沉积氧化物层,同时在氧化物层上形成第一V形谷底。 该方法还包括在离开第一V形谷的同时部分地平坦化氧化物层。 此外,该方法包括在氧化物层上形成第一电极,同时在第一电极上形成第二V形谷。 该方法还包括以保形方式在第一电极上形成电阻变化层。 该方法还包括在电阻变化层上形成第二电极。

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