A universal computer memory that combines the speed of RAM with the long-term storage capabilities of flash memory has long been a dream for scientists and engineers. And now, it may be one step closer to reality thanks to a new material called GST467.
In a recent study published in the journal Nature, scientists revealed that they have successfully built an extremely stable prototype using GST467 as one layer in a stacked-layer structure known as a superlattice. This new material could potentially pave the way for a universal memory that can replace both short- and long-term storage, while also being faster, cheaper, and more energy efficient.
The Current State of Computer Memory
Currently, computers use different types of memory for different purposes. RAM is fast but requires constant power and physical space, meaning its data is lost when the computer is turned off. Flash memory, on the other hand, retains data without power but is slower at transferring data to the processor.
While these two types of memory serve their own purposes well, there are limitations to each. This is where GST467 comes in.
The Potential of GST467
GST467 is a form of phase-change memory (PCM) that creates ones and zeros by switching between high- and low-resistance states on a glass-like material. When it crystallizes, it represents one and releases a large amount of energy with low resistance. When it melts, it represents zero and absorbs the same amount of energy with high resistance.
According to researchers, GST467 offers higher crystallization and lower melting temperatures than other alternatives made from antimony, terbium, and germanium in different ratios and crystal structures. In fact, in the study, the team designed and tested hundreds of working memory devices using GST467 and found that it achieved fast speeds while consuming very little power.
But that’s not all. The researchers also reported that GST467 can theoretically retain data for over 10 years, even at high temperatures above 248 degrees Fahrenheit. This goes beyond the fundamental trade-off for PCM technology and gives rise to superior device performance.
A Game-Changing Approach
The scientists behind this breakthrough describe GST467 as the most realistic and industry-friendly thing we’ve built and a key step towards a universal memory. It not only improves on a single metric but on several metrics simultaneously, making it a potential game-changer in the world of computer memory.
While there are still technical hurdles to overcome before a commercially viable universal memory can be created, this prototype using GST467 is as close as anyone has come. With its potential to revolutionize computer memory, we may soon see a new era of faster, more efficient, and more affordable computers.
References: livescience.com
