| 摘要 |
A cell array includes a semiconductor substrate including an active region comprising a first region, a second region, and a transition region, the second region being separated from the first region by the transition region, wherein a top surface of the second region is at a different level than a top surface of the first region. The cell array also includes a plurality of word lines crossing over the first region. The cell array also includes a selection line crossing over the active region, wherein at least a portion of the selection line is located over the transition region. |
