Semiconductor startup Positron has secured $230 million in Series B funding, TechCrunch has exclusively learned. The outfit plans to use the capital to speed up deployment of its high-speed memory chips, a critical component for the chips used for AI workloads, sources familiar with the matter told TechCrunch.  Investors in the round include Qatar Investment Authority (QIA), the country’s sovereign wealth fund, which has been increasingly focused on building out AI infrastructure, the sources said. The Reno-based startup’s Series B comes as hyperscalers and AI firms push to reduce their reliance on longstanding leader Nvidia. These firms include OpenAI, which, despite being one of Nvidia’s largest and most important customers, is reportedly unsatisfied with some of the firm’s latest AI chips and has been seeking alternatives since last year.  Meanwhile, Qatar, through QIA, has been accelerating a broader push into so-called “sovereign” AI infrastructure – a priority repeatedly underscored at Web Summit Qatar in Doha this week. Several sources told TechCrunch the country views compute capacity as critical to staying competitive on the global economic …