Amorphous Conductive Buffer for Magnetic Memory Patterning
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The formation of accurate patterns in magnetoresistive effect elements within magnetic memory devices is challenging due to difficulties in etching and patterning processes, which can lead to issues like increased film thickness, etching residues, and short-circuits.
Innovation Solution
The use of an amorphous conductive portion formed before the stacked structure, which acts as a buffer layer, allows for precise formation of the magnetoresistive effect element by avoiding the need for patterning the amorphous conductive layer during the etching process, thus preventing issues like increased film thickness, etching residues, and short-circuits.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If conventional etching and patterning processes are used to form magnetoresistive effect elements, then the device structure can be created, but the pattern formation accuracy deteriorates due to etching residues and short-circuits
Solution Approach 1:
The amorphous conductive portion is formed in advance before the stacked structure is created. This preliminary formation allows the subsequent stacked structure to be patterned with high precision without the interference of etching processes, as the amorphous conductive layer serves as a pre-formed base that eliminates the need for complex etching and patterning steps that normally cause residues and short-circuits.
2Manufacturing precision
If the amorphous conductive portion is formed before the stacked structure, then pattern accuracy is improved, but the manufacturing process complexity increases
Solution Approach 1:
The invention extracts and separates the amorphous conductive portion formation step from the conventional integrated etching and patterning process. By forming the amorphous conductive layer independently before the stacked structure, the complex multi-step etching and patterning sequence is simplified into more manageable, less error-prone steps, reducing overall process complexity while maintaining high precision.
3Ease of manufacture
If conventional patterning methods are used, then the process is simpler, but film thickness control deteriorates leading to increased thickness variations
Solution Approach 1:
The amorphous conductive portion is formed preliminarily with controlled thickness before the stacked structure is deposited. This pre-formed layer serves as a thickness reference and buffer that helps maintain uniform film thickness throughout the subsequent stacking process, eliminating the thickness variations that normally occur during conventional in-situ patterning operations.
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 accurate patterning of the stacked structure, improving the performance and reliability of the magnetoresistive effect element by ensuring the amorphous conductive portion is formed within the recess before the stacked structure, thereby avoiding common etching-related problems.
Implementation Method 1
an amorphous conductive portion provided on the electrode plug and including a part provided in the insulating region
Data Source
AI summary
According to one embodiment, a magnetic memory device includes a semiconductor substrate, an insulating region provided on the semiconductor substrate, an electrode plug provided in the insulating region, an amorphous conductive portion provided on the electrode plug and including a part provided in the insulating region, and a stacked structure provided on the amorphous conductive portion and including a magnetic layer.