March 2024

ByteDance (owner of TikTok) invested in InnoStar, a Shanghai-based RRAM developer established in 2019. ByteDance, through its Picoheart subsidiary, now holds a 9.5% share in InnoStar, making it the company's third largest stakeholder, after Memris Asia Pacific (28.8%) and Shanghai Alliance (26.3%). 

Picoheart is ByteDance's VR developer, which means that ByteDance likely hopes to adopt RRAM technology in future VR headsets.

US-based Tetramem published a paper that shows its form of RRAM-powered analog computing is capable of executing calculations with arbitrary precision. It says the ability to perform high-precision multiplication within single electronic devices that can be readily formed in arrays offers scope to reduce the power consumption of machine learning when based on artificial neural networks.

The Tetramem device is made of a mixture of Al3O2, above a layer of HfO2 sandwiched between a tantalum/titanium top electrode and a platinum bottom electrode. Each of the bilayers is less than 1nm thick so that after being laid down they appear to form a mixed layer rather than two separate continuous layers. The device was fabricated in a 240-nm diameter via above the CMOS peripheral circuitry.