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Phase-Change Memory for In-Memory Computing
Ghazi Sarwat Syed1, Manuel Le Gallo1, Abu Sebastian1
1IBM Research-Europe, Säumerstrasse 4, 8803 Rüschlikon, Switzerland.
Chemical Reviews
|May 22, 2025
Summary
In-memory computing (IMC) performs calculations within memory, overcoming processor-memory bottlenecks. Phase-change memory (PCM) is a key technology for developing these novel IMC chips.
Area of Science:
- Materials Science
- Computer Engineering
- Nanotechnology
Background:
- The processor-memory divide limits computational efficiency in conventional architectures.
- In-memory computing (IMC) offers a paradigm shift by performing computations directly within memory arrays.
- Phase-change memory (PCM) is a promising technology for realizing IMC due to its unique physical properties.
Purpose of the Study:
- To provide a comprehensive review of phase-change materials and PCM device physics for IMC.
- To examine the design and fabrication of PCM-based IMC chips.
- To offer insights into the application landscape and future directions of PCM-based IMC.
Main Methods:
- Review of current phase-change materials and their properties.
- Analysis of PCM device physics relevant to computational functions.
- Survey of existing PCM-based IMC chip designs and fabrication techniques.
- Exploration of potential applications and future research avenues.
Main Results:
- PCM devices exhibit suitable characteristics for in-memory computation.
- Various PCM-based IMC architectures have been designed and fabricated.
- Significant progress has been made in material selection and device optimization for IMC.
Conclusions:
- PCM technology is a viable and rapidly advancing platform for in-memory computing.
- Further research in materials, device engineering, and system integration is crucial for widespread adoption.
- IMC based on PCM holds potential to revolutionize computing by enhancing energy efficiency and performance.
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