<p>This work presents a novel Dual-Split Bottom Gate Bottom Contact (BGBC) 8T Static Random Access Memory (DS-pOTFT 8T SRAM) architecture featuring p+ doped pentacene ditched formation as the active channel material on LaxNb(1-x)Oy dielectric substrate. The innovative design addresses critical challenges in conventional silicon-based and organic thin-film transistor (OTFT) memory systems, including bitline (BL) leakage current, write-read conflicts, and subthreshold instability that increasingly plague System-on-Chip (SoCs) applications. Comprehensive Silvaco ATLAS simulations demonstrate exceptional performance improvements as 66% reduction in off-state leakage current compared to T6T designs and 39% versus DC8T architectures, while achieving 58% energy savings per bit operation. The dual data-aware word-line control mechanism enhances write static noise margin by 64%, increasing stability from 220 mV to 280 mV under low-voltage conditions. Read operations demonstrate 56<InlineEquation ID="IEq1"> <InlineMediaObject> <ImageObject Color="BlackWhite" FileRef="10470_2025_2461_Article_IEq1.gif" Format="GIF" Height="13" Rendition="HTML" Resolution="72" Type="Linedraw" Width="19" /> </InlineMediaObject> <EquationSource Format="TEX">\(\times\)</EquationSource> </InlineEquation>, 45<InlineEquation ID="IEq2"> <InlineMediaObject> <ImageObject Color="BlackWhite" FileRef="10470_2025_2461_Article_IEq1.gif" Format="GIF" Height="13" Rendition="HTML" Resolution="72" Type="Linedraw" Width="19" /> </InlineMediaObject> <EquationSource Format="TEX">\(\times\)</EquationSource> </InlineEquation>, 36<InlineEquation ID="IEq3"> <InlineMediaObject> <ImageObject Color="BlackWhite" FileRef="10470_2025_2461_Article_IEq1.gif" Format="GIF" Height="13" Rendition="HTML" Resolution="72" Type="Linedraw" Width="19" /> </InlineMediaObject> <EquationSource Format="TEX">\(\times\)</EquationSource> </InlineEquation>, and 28<InlineEquation ID="IEq4"> <InlineMediaObject> <ImageObject Color="BlackWhite" FileRef="10470_2025_2461_Article_IEq1.gif" Format="GIF" Height="13" Rendition="HTML" Resolution="72" Type="Linedraw" Width="19" /> </InlineMediaObject> <EquationSource Format="TEX">\(\times\)</EquationSource> </InlineEquation> performance improvements over 6T, 7T, 8T, and 9T configurations respectively, while write operations show 32<InlineEquation ID="IEq5"> <InlineMediaObject> <ImageObject Color="BlackWhite" FileRef="10470_2025_2461_Article_IEq1.gif" Format="GIF" Height="13" Rendition="HTML" Resolution="72" Type="Linedraw" Width="19" /> </InlineMediaObject> <EquationSource Format="TEX">\(\times\)</EquationSource> </InlineEquation>, 41<InlineEquation ID="IEq6"> <InlineMediaObject> <ImageObject Color="BlackWhite" FileRef="10470_2025_2461_Article_IEq1.gif" Format="GIF" Height="13" Rendition="HTML" Resolution="72" Type="Linedraw" Width="19" /> </InlineMediaObject> <EquationSource Format="TEX">\(\times\)</EquationSource> </InlineEquation>, 15<InlineEquation ID="IEq7"> <InlineMediaObject> <ImageObject Color="BlackWhite" FileRef="10470_2025_2461_Article_IEq1.gif" Format="GIF" Height="13" Rendition="HTML" Resolution="72" Type="Linedraw" Width="19" /> </InlineMediaObject> <EquationSource Format="TEX">\(\times\)</EquationSource> </InlineEquation>, and 7<InlineEquation ID="IEq8"> <InlineMediaObject> <ImageObject Color="BlackWhite" FileRef="10470_2025_2461_Article_IEq1.gif" Format="GIF" Height="13" Rendition="HTML" Resolution="72" Type="Linedraw" Width="19" /> </InlineMediaObject> <EquationSource Format="TEX">\(\times\)</EquationSource> </InlineEquation> enhancements. Power consumption analysis reveals substantial reductions by factors of 54<InlineEquation ID="IEq9"> <InlineMediaObject> <ImageObject Color="BlackWhite" FileRef="10470_2025_2461_Article_IEq1.gif" Format="GIF" Height="13" Rendition="HTML" Resolution="72" Type="Linedraw" Width="19" /> </InlineMediaObject> <EquationSource Format="TEX">\(\times\)</EquationSource> </InlineEquation>-79<InlineEquation ID="IEq10"> <InlineMediaObject> <ImageObject Color="BlackWhite" FileRef="10470_2025_2461_Article_IEq1.gif" Format="GIF" Height="13" Rendition="HTML" Resolution="72" Type="Linedraw" Width="19" /> </InlineMediaObject> <EquationSource Format="TEX">\(\times\)</EquationSource> </InlineEquation> during read operations and approximately 59x-82<InlineEquation ID="IEq11"> <InlineMediaObject> <ImageObject Color="BlackWhite" FileRef="10470_2025_2461_Article_IEq1.gif" Format="GIF" Height="13" Rendition="HTML" Resolution="72" Type="Linedraw" Width="19" /> </InlineMediaObject> <EquationSource Format="TEX">\(\times\)</EquationSource> </InlineEquation> during write operations compared to baseline architectures. The strategic p+ doped ditch layer formation significantly improves charge carrier mobility while maintaining ultra-low leakage power of 0.6 nW. Write latency reduction of 22% and 40% improvement in read stability, combined with fastest write operation of about 19 pS, position this architecture as superior to existing Hybrid 6T pOTFT (H6T), Takamiya’s 6T (T6T), dual-threshold 8T CNTFET (DC8T), Fukuda 6T (F6T), data-scheme PMOS-NMOS 10T (DS10T), and BLE10T based SRAM designs. With only 12–15% area overhead, the DS-pOTFT 8T SRAM offers exceptional scalability for Computing-in-Memory (CIM) applications, flexible electronics and edge AI accelerators where energy efficiency and noise tolerance are paramount, representing a transformative advancement in next-generation memory architecture design.</p>

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DS pOTFT 8T: Analysis of Dual data aware SRAM cell employing pentacene ditch formation on BGBC OTFT and LaxNb(1-x) Oy layer for high-speed, low-leakage flexible computing devices

  • Surbhi Bharti,
  • Ashwni Kumar

摘要

This work presents a novel Dual-Split Bottom Gate Bottom Contact (BGBC) 8T Static Random Access Memory (DS-pOTFT 8T SRAM) architecture featuring p+ doped pentacene ditched formation as the active channel material on LaxNb(1-x)Oy dielectric substrate. The innovative design addresses critical challenges in conventional silicon-based and organic thin-film transistor (OTFT) memory systems, including bitline (BL) leakage current, write-read conflicts, and subthreshold instability that increasingly plague System-on-Chip (SoCs) applications. Comprehensive Silvaco ATLAS simulations demonstrate exceptional performance improvements as 66% reduction in off-state leakage current compared to T6T designs and 39% versus DC8T architectures, while achieving 58% energy savings per bit operation. The dual data-aware word-line control mechanism enhances write static noise margin by 64%, increasing stability from 220 mV to 280 mV under low-voltage conditions. Read operations demonstrate 56 \(\times\) , 45 \(\times\) , 36 \(\times\) , and 28 \(\times\) performance improvements over 6T, 7T, 8T, and 9T configurations respectively, while write operations show 32 \(\times\) , 41 \(\times\) , 15 \(\times\) , and 7 \(\times\) enhancements. Power consumption analysis reveals substantial reductions by factors of 54 \(\times\) -79 \(\times\) during read operations and approximately 59x-82 \(\times\) during write operations compared to baseline architectures. The strategic p+ doped ditch layer formation significantly improves charge carrier mobility while maintaining ultra-low leakage power of 0.6 nW. Write latency reduction of 22% and 40% improvement in read stability, combined with fastest write operation of about 19 pS, position this architecture as superior to existing Hybrid 6T pOTFT (H6T), Takamiya’s 6T (T6T), dual-threshold 8T CNTFET (DC8T), Fukuda 6T (F6T), data-scheme PMOS-NMOS 10T (DS10T), and BLE10T based SRAM designs. With only 12–15% area overhead, the DS-pOTFT 8T SRAM offers exceptional scalability for Computing-in-Memory (CIM) applications, flexible electronics and edge AI accelerators where energy efficiency and noise tolerance are paramount, representing a transformative advancement in next-generation memory architecture design.