IGZO Particle Memory Structure for Lateral Leakage Reduction
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Solution Overview
Problem
Non-volatile memory structures face challenges in reducing lateral leakage to ensure long-term operation and prevent information loss, as existing technologies are inadequate in managing charge carrier storage effectively.
Innovation Solution
A memory structure comprising a substrate, gate electrode, first isolation layer, thin metal layer with metal particles, indium gallium zinc oxide (IGZO) particles, second isolation layer, IGZO channel layer, and source/drain electrodes, where the IGZO particles act as a medium for charge carrier storage via tunneling effect, reducing lateral leakage through controlled thickness and material selection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional memory structures are used, then manufacturing is simpler, but lateral leakage increases causing information loss
Solution Approach 1:
The memory structure segments the charge storage function into discrete IGZO particles distributed within the insulating layer, rather than using a continuous storage layer. This segmentation reduces lateral leakage pathways while maintaining storage capacity, directly addressing the technical contradiction between reliability and structural simplicity.
Solution Approach 2:
The patent applies local quality by creating regions with different functional properties: IGZO particles are concentrated in specific areas to provide localized charge storage, while the surrounding insulating material provides electrical isolation. This localized approach reduces overall lateral leakage without requiring complete structural redesign.
2Reliability
If IGZO particles are used for charge storage, then lateral leakage is reduced, but manufacturing precision requirements increase
Solution Approach 1:
The patent uses an intermediary approach by forming IGZO particles through a two-step process: first depositing a uniform IGZO layer, then selectively removing portions to create particles. This intermediary step (selective removal) allows better control over particle formation and distribution, reducing manufacturing precision requirements compared to direct particle formation methods.
Solution Approach 2:
The patent applies parameter changes by controlling the thickness and composition of the IGZO layer, as well as the removal parameters, to optimize particle formation. By adjusting these parameters, the manufacturing process achieves the desired particle characteristics with standard fabrication capabilities, balancing reliability improvement with manufacturing feasibility.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The proposed structure effectively reduces lateral leakage, ensuring long-term operation and preventing information loss by utilizing IGZO particles to store charge carriers efficiently, thereby enhancing the stability and reliability of non-volatile memory devices.
Implementation Method 1
performing a thermal annealing treatment on the thin metal layer such that the thin metal layer has metal particles
Implementation Method 2
the IGZO particles may act as a medium to store charge carriers (electrons) that is induced by a tunneling effect
Data Source
AI summary
A memory structure includes a substrate, a gate electrode, a first isolation layer, a thin metal layer, indium gallium zinc oxide (IGZO) particles, a second isolation layer, an IGZO channel layer, and a source/drain electrode. The gate electrode is located on the substrate. The first isolation layer is located on the gate electrode. The thin metal layer is located on the first isolation layer, and has metal particles. The IGZO particles are located on the metal particles. The second isolation layer is located on the IGZO particles. The IGZO channel layer is located on the second isolation layer. The source/drain electrode is located on the IGZO channel layer.