Invention Grant
US08169055B2 Chip guard ring including a through-substrate via 有权
芯片保护环包括贯通基板通孔

Chip guard ring including a through-substrate via
Abstract:
At least one through-substrate via is formed around the periphery of a semiconductor chip or a semiconductor chiplet included in a semiconductor chip. The at least one through-substrate via may be a single through-substrate via that laterally surrounds the semiconductor chip or the semiconductor chiplet, or may comprise a plurality of through-substrate vias that surrounds the periphery with at least one gap among the through-substrate vias. A stack of back-end-of-line (BEOL) metal structures that laterally surrounds the semiconductor chip or the semiconductor chiplet are formed directly on the substrate contact vias and electrically connected to the at least one through-substrate via. A metallic layer is formed on the backside of the semiconductor substrate including the at least one through-substrate via. The conductive structure including the metallic layer, the at least one through-substrate via, and the stack of the BEOL metal structures function as an electrical ground built into the semiconductor chip.
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