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    • 6. 发明授权
    • Method of manufacturing deep trench capacitor
    • 制造深沟槽电容器的方法
    • US06680237B2
    • 2004-01-20
    • US09967709
    • 2001-09-27
    • Shih-Lung ChenHsiao-Lei WangHwei-Lin ChuangYueh-Chuan Lee
    • Shih-Lung ChenHsiao-Lei WangHwei-Lin ChuangYueh-Chuan Lee
    • H01L2120
    • H01L27/10867
    • A method of manufacturing a deep trench capacitor. A deep trench is formed in a substrate. A conformal capacitor dielectric layer and a first conductive layer are sequentially formed, completely filling the deep trench. The first conductive layer has a seam. The first conductive layer is etched to open up the seam. A collar oxide layer is formed over the interior surface of the deep trench. A collar liner layer is formed over the collar oxide layer inside the deep trench. Using the collar liner layer as a mask, the collar oxide material above the first conductive layer and within the seam is removed. The collar liner layer is removed. Finally, a second conductive layer and a third conductive layer are sequentially formed inside the deep trench.
    • 一种制造深沟槽电容器的方法。 在衬底中形成深沟槽。 依次形成保形电容器电介质层和第一导电层,完全填充深沟槽。 第一导电层具有接缝。 蚀刻第一导电层以打开接缝。 在深沟槽的内表面上形成环状氧化物层。 在深沟槽内部的轴环氧化物层上方形成轴环衬层。 使用套环内层作为掩模,去除第一导电层上方和接缝内的环氧化物材料。 衣领衬里层被去除。 最后,在深沟槽内依次形成第二导电层和第三导电层。