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Ishimaru, Kazunari; Tamura, Mizuki; Fujii, Osamu
IEEE journal of the Electron Devices Society, 2021, Letnik: 9Journal Article
Static random-access memory (SRAM) is an essential component for realizing large-scale integration (LSI). The future transition to a 48 V DC supply in datacenters and electric vehicles acting as mobile edge servers will increase the demand for a bipolar-complementary metal-oxide semiconductor-double diffused metal-oxide semiconductor with high-capacity SRAM. When we scaled and optimized an SRAM cell from 130 nm nodes to 90 nm nodes, we observed the generation of crystal defects induced by mechanical stress in the p-channel MOS active area that cannot be explained by previous models. We performed simulations using the finite element method to identify the mechanism. In our results, the edge of the narrow active area showed a large deformation compared to the middle of the active area, which can be attributed to compressive stress from the gate electrode and sidewall. The cell layout and sidewall structure were optimized to suppress this defect generation while satisfying reliability requirements, and the design can be extended to 65 nm nodes.
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Leto | Faktor vpliva | Izdaja | Kategorija | Razvrstitev | ||||
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JCR | SNIP | JCR | SNIP | JCR | SNIP | JCR | SNIP |
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in: SICRIS
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