Here’s what investors need to know about ReRAM and how ASX chip stocks can make big bucks from it!

Our longer term readers would know we are big fans of Weebit Nano (ASX:WBT), a company commercialising its own version of a technology known as ReRAM (Resistive Random-Access Memory). We’ve spoken a lot about Weebit and certain other chip stocks embracing it (which we’ll get into shortly), but we’ve never written an article focused on the technology. We thought it was time for that to change.

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What is ReRAM?

ReRAM is a next-generation type of non-volatile memory. Memory is what makes it possible  for electronic devices to operate by processing and storing date. Non-volatile memory is so-called because it retains data even when the device is turned off.

ReRAM’s way of storing data involves changing the resistance across a dielectric solid-state material. It creates or disrupts a conductive path through a dielectric material, usually using metal oxides. This resistive switching allows it to store a “0” or “1” without needing a continuous power supply.

Why is it important?

ReRAM is viewed as one of the most promising candidates to replace or supplement previous generation memory technologies, like flash memory and DRAM, in various applications. It is also viewed as more promising than other competing emerging technologies, such as MRAM (Magnetic RAM). This is for many reasons, including that ReRAM:

• Has read/write speeds comparable to DRAM,
• Is far more energy efficient than current flash memory,
• Can handle more write-erase cycles, and
• Can be scaled down (i.e. made smaller) much better than flash.

It is the latter that is arguably the most important. As devices get smaller and smaller while being expected to do more and more, flash memory becomes technically less reliable and viable from a financial standpoint. This is why alternatives to flash are being sought.

Given all of the above, ReRAM is being considered for various emerging tech areas, including AI and edge computing, the Internet of Things (IoT), Smartphones and wearables, neuromorphic computing and data centres.

Weebit Nano is starting to commercialise ReRAM, and other companies may follow

The ASX company most advanced is Weebit Nano (ASX:WBT), which is commercialising its own version of ReRAM. Of the ASX-listed ReRAM players, it is the most advanced as it is already commercialising its technology, with four commercial partners – American semiconductor fab SkyWater (NDQ:SKYT), South Korean fab DB HiTek, chip designer and manufacturer onsemi, and one (currently anonymous) product company. In FY25, the company made $4.4m in revenue, up 333% from the year before.

What’s so special about WBT’s ReRAM specifically? Well, it can perform 10-100x better than Flash memory because it can handle 100k-1m read/write cycles, can store and retain data for 10 years at 175C or 20 years at 125C, has a 100x faster access time, and can withstand up to 350x more radiation than Flash.  

All the while, it adds far less to the cost of a semiconductor wafer than flash or other technologies and has lower power consumption levels and lower voltage requirements, thus enabling a longer battery life. And most critically, it can scale down further than Flash Memory, i.e. Weebit’s technology has been taped-out at 22nm already and can likely be scaled down further below 20nm. Flash on the other hand is currently manufactured at 40nm for large scale storage solutions, like in mobile phones and laptops. But it can’t economically scale down much beyond that.

Other companies embracing ReRAM

The most noteable other ReRAM player on ASX was 4DS Memory (ASX:4DS). To make a long story short about this company, several forks in the road have delayed its progress and now it is all but dead.

So, that leaves only Dorsavi (ASX:DVL), which has sensor technology – intended to identify and correct the risk of injuries in workplaces and to monitor recovery from injuries. In June 2025, the company acquired the rights to a ReRAM technology from NTU in Singapore, a technology that it aims to integrate into its own sensor technology. Of course, there are other chip stocks with differing technologies serving different purposes. Investors interested in finding out more should read this article, but we’ll stick to talking about ReRAM in this article. 

The big chip makers are embracing ReRAM too, led by TSMC, which makes chips for some of the world’s biggest companies, including Apple. The latter has been using TSMC’s ReRAM in its latest generation iPhones. This may seem bad for WBT at first glance – but when TSMC first started shipping ReRAM in chipsets for the iPhone 14, it essentially validated the use of that technology going forward. This has actually helped WBT a lot in its conversations with prospects!

Conclusion

There’s a lot to know about ReRAM, much of it is very technical. But we hope this article has given investors a broad overview of the technology and why it will be important going forward.

You can read all you want to know about ReRAM in Pitt Street Research’s research coverage of Weebit Nano here!