Reconfigurable mmWave microchips co-integrating hBN switches on GaN - Nature

This research represents a significant advancement in mmWave microchip technology, demonstrating the successful integration of reconfigurable mmWave switches based on two-dimensional hexagonal boron n... Read original →

This hBN-GaN co-integrated mmWave switch disrupts conventional RFIC design by offering sub-0.3 dB insertion loss and >15 dB isolation up to 100 GHz—outperforming PIN diodes and scaled FETs. Technically, it alleviates the high-frequency limitations of sub-3nm EUV nodes and enables monolithic 6G front-end integration. From a compliance standpoint, while 2D materials aren’t yet export-controlled, U.S. regulators could restrict EDA or deposition tools under the CHIPS Act if this architecture gains traction in 6G standards, raising R&D barriers for Chinese firms. Competitively, Qorvo and Skyworks may rush to acquire memristive or 2D-material startups, while Taiwan, China-based foundries like Win Semiconductors face strategic retooling pressure. Over the next 12–24 months, expect a race to standardize hybrid GaN/2D platforms; if SMIC or Hua Hong establishes compatible pilot lines early, they could carve out a niche in 6G RF foundry services.