Annular Chalcogenide Memory Cell Structural Integrity

Resolve Bottlenecks,
Find Innovative SolutionsGenerate Solutions

Solution Overview

Problem

Achieving high density memory structures with good component symmetry and structural integrity is challenging due to complex fabrication processes and disparities in material characteristics in traditional phase change memory cells.

Innovation Solution

The use of chalcogenide materials configured in an annular shape or substantially circumscribing an interior conductive material, with specific electrode and conductive materials to form memory cells and structures that enhance symmetry and integrity, along with a planar architecture for memory devices.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If traditional phase change memory cell structures are used, then memory functionality is achieved, but component symmetry and structural integrity deteriorate

Engineering Contradiction:

Improvestructural integrityVSAvoidcomponent symmetry

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The patent applies asymmetry by configuring the chalcogenide material in an annular shape that deliberately breaks the symmetry of traditional PCM cell structures. This asymmetric annular configuration allows for improved structural integrity and component symmetry in the overall device architecture while maintaining memory functionality through the phase change properties of the chalcogenide material.

Inventive Principle:

Principle #4Asymmetry

2Quantity of substance

If high density memory structures are achieved, then storage capacity increases, but fabrication complexity and material disparity increase

Engineering Contradiction:

Improvememory densityVSAvoidfabrication process complexity

Core Design Contradiction:

Quantity of substanceVSEase of manufacture

Solution Approach 1:

The patent employs parameter changes by modifying the geometric configuration of the chalcogenide material to an annular shape and adjusting material composition parameters. These parameter changes enable high density memory structures to be fabricated with improved ease of manufacture, as the annular configuration simplifies the fabrication process while maintaining high storage capacity through efficient space utilization.

Inventive Principle:

Principle #35Parameter changes

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

This approach enables the fabrication of high density memory structures with improved symmetry and structural integrity, addressing the limitations of traditional methods and enhancing memory device performance.

Implementation Method 1

different physical states of the chalcogenide material can have different levels of electrical resistance. As one specific example, one state of a chalcogenide material, such as an amorphous state, can have a high electrical resistance, while another state, such as a crystalline state, can have a low electrical resistance.

Methodology Applied

Scientific EffectPhase change: Phase Change

Data Source

PatentUS11283016B2Chalcogenide-based memory architecture

Publication Date: 2022.03.22 INTEL CORP

AI summary

A memory cell can include a chalcogenide material configured in an annular shape or a chalcogenide material substantially circumscribing an interior conductive channel. Such memory cells can be included in memory structures having an interior conductive channel and a plurality of alternating dielectric layers and memory layers oriented along the interior conductive channel. Individual memory layers can include a chalcogenide material substantially circumscribing the interior conductive channel.