发明申请
US20120249159A1 Stacked Via Structure For Metal Fuse Applications 有权
金属保险丝应用的堆叠通孔结构

Stacked Via Structure For Metal Fuse Applications
摘要:
A back end of the line (BEOL) fuse structure having a stack of vias. The stacking of vias leads to high aspect ratios making liner and seed coverage inside the vias poorer. The weakness of the liner and seed layers leads to a higher probability of electromigration (EM) failure. The fuse structure addresses failures due to poor liner and seed coverage. Design features permit determining where failures occur, determining the extent of the damaged region after fuse programming and preventing further propagation of the damaged dielectric region.
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