Mask Layer Structuring for Solid Electrolyte Memory

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Solution Overview

Problem

Existing methods for manufacturing solid electrolyte memory devices face challenges in maintaining the smoothness of electrode surfaces due to chemical reactions between plasma gases and electrode materials, leading to the formation of clusters that affect the electrical characteristics and reproducibility of the devices.

Innovation Solution

A method involving a mask layer structure with a first substance used to create a first vertical level above the electrode layer, followed by a second substance that does not chemically react with the electrode material, ensuring no cluster formation, is employed. This method uses plasma gases like fluorine for the first substance and noble gases like argon for the second substance, preventing chemical reactions that damage the electrode surface.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Manufacturing precision

If plasma gases are used to structure the mask layer, then the mask layer can be effectively patterned, but chemical reactions occur between the plasma gases and electrode material causing cluster formation

Engineering Contradiction:

Improvemask layer structuring precisionVSAvoidchemical reaction damage to electrode surface

Core Design Contradiction:

Manufacturing precisionVSObject-affected harmful factors

Solution Approach 1:

The mask layer is divided into multiple segments at different vertical levels, with the first portion being structured to a first vertical level and the second portion to a second vertical level. This segmentation allows different substances to be used for structuring different portions, preventing harmful chemical reactions while maintaining effective pattern transfer.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The mask layer acts as an intermediary between the plasma gases and the electrode layer. By structuring the mask layer in two stages with different substances, the harmful direct contact between reactive plasma gases and the electrode material is prevented, while still achieving the desired pattern transfer to the solid electrolyte layer.

Inventive Principle:

Principle #24Intermediary (Mediator)

2Ease of manufacture

If a single substance is used to structure the mask layer, then the process is simpler, but it cannot prevent chemical reactions with the electrode material

Engineering Contradiction:

Improvemask layer structuring process simplicityVSAvoidchemical reaction and cluster formation

Core Design Contradiction:

Ease of manufactureVSObject-affected harmful factors

Solution Approach 1:

The mask layer structuring process is segmented into two distinct steps: first structuring to a first vertical level using a first substance, then structuring to a second vertical level using a second substance. This segmentation enables the process to maintain simplicity while avoiding harmful chemical reactions through careful selection of substances for each step.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The mask layer is preliminarily structured to the first vertical level before the final structuring to the second vertical level. This preliminary action allows the process to establish a protective configuration early, preventing harmful chemical reactions before they can occur during subsequent processing steps.

Inventive Principle:

Principle #10Preliminary action

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 ensures the smoothness and electrical integrity of the electrode surface, enhancing the reproducibility and quality of the solid electrolyte memory devices by avoiding the formation of clusters and maintaining the smoothness of the electrode layer.

Implementation Method 1

structuring the mask layer to a first vertical level using a first substance, the first vertical level lying above the vertical level of the top surface of the electrode layer

Methodology Applied

Scientific EffectPlasma etching: Plasma

Implementation Method 2

structuring the mask layer to at least the vertical level of the top surface of the electrode layer (second vertical level) using a second substance, wherein the second substance does not react chemically with the electrode layer material

Methodology Applied

Scientific EffectPlasma: Plasma

Data Source

PatentUS7799696B2Method of manufacturing an integrated circuit

Publication Date: 2010.09.21 SAMSUNG ELECTRONICS CO LTD

AI summary

A method of manufacturing an integrated circuit including a memory device that includes the following processes: forming a mask layer structure above a composite structure including a resistivity changing layer and an electrode layer disposed above the resistivity changing layer; partially patterning the mask layer structure using a first substance; stopping patterning the mask layer structure before exposing the top surface of the electrode layer; at least partially exposing the top surface of the electrode layer using a second substance, the second substance chemically not reacting with the electrode layer material.