Uprecision, Piotech, ISabers look like they are big three in bonding technology in China. Piotech and ISabers looks like they have a more complete with metrology and surface treatment. U-precision seems to be weaker in that part but given that they do wafers stages for lithography machines, I estimate that their tools are the most precise in the market, thought HB precision is in the range of 200nm to a few microns.
U-Precision delivering its W2W Fusion Bonding Equipment to customer. Another milestone for the company after its D2W chiplet hybrid bonding equipment got delivered in 2026/2/4
This equipment/technology can be used for 3D IC stacking. It fills a whole in China's advanced packaging equipment, especially HBM supply chain, where domestic market share is 5%.
Can be used to vertically stack multiple DRAM chip layers