Interestingly, CXMT (ChangXin Memory Technologies) also started with Siemens technology: CXMT bought a big DRAM patent portfolio from Polaris Innovations, a Canadian patent-monetisation firm. The patents were originally from Qimonda which used to be Infineon. Qimonda’s Xi’an R&D center, with 400-500 engineers, was one of the largest Qimonda built outside Germany. After Qimonda’s collapse, their the whole Xi’an R&D center was acquired. In addition, CXMT successfully attracted Karl-Heinz Kuesters, a senior engineer, from Qimonda’s German site to Hefei, China. Kuesters had spent 24 years as a VP of technology and pre-development across Siemens, Infineon, and Qimonda.