消除循环诱导的双层3DNAND闪存存储器联合形细胞干扰的调查
Kaikai You1,2, Lei Jin1,2, Jianquan Jia1,2
1Institute of Microelectronics, Chinese Academy of Sciences, Beijing 100029, China.
Micromachines
|October 28, 2023
概括
解决了3D NAND Flash多层架构中的可靠性问题. 联合区域的模拟文字线 (WL) 经历值电压变化,在删除循环过程中影响相邻的数据WL.
科学领域:
- 电气工程 电气工程
- 材料科学 材料科学 材料科学
背景情况:
- 3D NAND闪存技术正在随着多层架构的发展而发展,以满足日益增长的存储需求.
- 多甲板3D NAND闪存中甲板之间的联合区域带来了独特的可靠性挑战.
研究的目的:
- 为了调查3D NAND闪存中的异常可靠性问题,与甲板关节区域的虚拟文字线 (WL) 干扰有关.
- 为了确定在擦除循环过程中模拟WL中值电压转移的根本原因.
- 提出一个解决方案来缓解这种可靠性问题.
主要方法:
- 分析双层和三层3D NAND Flash架构中的可靠性问题.
- 利用技术计算机辅助设计 (TCAD) 模拟来建模电子行为.
- 开发和测试一个优化的删除方案.
主要成果:
- 确定了一个异常的可靠性问题,其特点是擦除循环后在关节区域的模拟WL中增加值电压 (Vt).
- TCAD模拟表明,在删除过程中通过Fowler-Nordheim (FN) 道向后注入的电子是虚拟WL干扰的原因.
- 提出的最佳除方案有效地减少了反向电子注入.
结论:
- 这项研究阐明了多层3DNAND闪存中异常的模拟WL干扰背后的机制.
- 建议采用优化的删除方案来抑制这种干扰,从而提高先进的3D NAND闪存的可靠性.
相关概念视频
Non-ohmic Devices
1.1K
In most substances, the current flow is proportional to the voltage applied to it. A simple relationship between the values of current, voltage, and resistance is known as Ohm's law. Nonohmic devices do not exhibit a linear relationship between voltage and current. One such device is the semiconducting circuit element known as a diode. A diode is a circuit device that allows current flow in only one direction.
Consider a simple circuit consisting of a battery, a diode, and a resistor. A...
Consider a simple circuit consisting of a battery, a diode, and a resistor. A...
1.1K
Diode: Reverse bias
762
A diode is reverse-biased when the positive terminal of an external voltage source is connected to the n-type material and the negative terminal to the p-type material. This configuration opposes the natural direction of current flow through the diode, effectively increasing the width of the depletion region and the barrier potential. The reverse bias condition produces a minimal leakage current, primarily due to minority charge carriers. This leakage becomes significant when the reverse...
762
Understanding Memory
320
Memory is the retention of information or experiences over time, facilitated through three main processes: encoding, storage, and retrieval. Encoding is the process of inputting information into the memory system. For instance, when listening to a lecture, watching a play, reading a book, or having a conversation, the brain is actively encoding information. This initial stage involves transforming sensory input into a form that can be processed and stored by the brain. Various factors, such as...
320
Diode: Forward bias
1.1K
In semiconductor devices, diodes play a crucial role in directing current flow, and its operation is primarily categorized into forward bias and reverse bias. A diode is said to be forward-biased when its p-type region is connected to the positive terminal of a battery and its n-type region is linked to the negative terminal. This configuration reduces the potential barrier within the diode, allowing current to flow easily from the p to the n-type region.
The behavior of a diode in forward bias...
The behavior of a diode in forward bias...
1.1K
MOSFET: Depletion Mode
368
Depletion-mode MOSFETs represent a unique subset of MOSFET technology, functioning fundamentally differently from their enhancement-mode counterparts. Unlike enhancement MOSFETs, which require a positive gate-source voltage (Vgs) to turn on, depletion-mode MOSFETs are inherently conductive and "normally on" devices.
The primary characteristic of depletion-mode MOSFETs is their ability to conduct current between the drain and source terminals without gate bias. This inherent conductivity...
The primary characteristic of depletion-mode MOSFETs is their ability to conduct current between the drain and source terminals without gate bias. This inherent conductivity...
368
Dielectric Polarization in a Capacitor
4.7K
The presence of a dielectric medium in a capacitor not only changes the voltage and capacitance but also affects the electric field. In general, dielectrics can be of two types: polar and nonpolar. In a polar dielectric, the positive and negative charges in the molecules are separated by a distance and hence have a permanent dipole moment. In contrast, no such charge separation exists in a nonpolar dielectric, however the nonpolar molecules get polarized in the presence of an external electric...
4.7K


