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高性能突触阵列用于通过浮式门工程IGZO突触晶体管通过神经形态计算.
Junhyeong Park1, Yumin Yun1, Sunyeol Bae1
1Department of Electrical and Computer Engineering, and Inter-university Semiconductor Research Center (ISRC), Seoul National University, Seoul, 08826, Republic of Korea.
Advanced science (Weinheim, Baden-Wurttemberg, Germany)
|March 20, 2025
概括
新的--氧化物 (IGZO) 突触晶体管与-氧化物 (ITO) 浮式门改善了神经形态计算. 这些人造突触克服了保留问题,在神经网络模拟中实现了高精度.
科学领域:
- 材料科学 材料科学 材料科学
- 电气工程 电气工程
- 计算机科学 计算机科学
背景情况:
- 神经形态计算模仿人类大脑,为传统·诺伊曼架构提供了替代方案.
- 人工突触对于构建硬件神经形态系统至关重要.
- 基于--氧化物 (IGZO) 的突触晶体管提供低温处理和CMOS兼容性,但电荷脱落和保留不佳.
研究的目的:
- 开发先进的IGZO突触晶体管,以提高神经形态计算的性能.
- 为了解决低电荷脱陷效率和现有IGZO突触器件中不充分保留的局限性.
- 为了证明氧化 (ITO) 浮式门在改善突触晶体管特性方面的有效性.
主要方法:
- 制造具有 ITO 浮动门 (FG) 的 IGZO 突触晶体管.
- 采用原子层沉积 (ALD) 为Al2O3道层 (TL),以确保光滑的FG/TL接口.
- 使用半脉冲编程方案测试一个8x8的突触阵列.
- 在MNIST和时尚-MNIST数据集上执行尖端神经网络模拟.
主要成果:
- 新的ITO FG设计显著提高了电气性能和设备保留.
- 制造的8x8突触阵列显示出100%的产量和无干扰的编程.
- 尖端神经网络模拟实现了98.31% (MNIST) 和87.76% (时尚-MNIST) 的高精度,即使考虑了设备变化和保留.
结论:
- 具有ITO浮动门的IGZO突触晶体管有效地克服了以前的性能限制.
- 这些改进的设备显示了实际神经形态计算应用的巨大潜力.
- 这项研究突出了开发高性能人工突触的可行途径,用于大脑启发的计算.
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