Dec 19 (Reuters) - The Chinese unit of Netherlands-based Nexperia has locked in supplies of silicon wafers from local firms to cover its entire 2026 production for one type of power chip, a document showed, after the Dutch firm ​stopped supplying the raw material in a corporate dispute. The development will allow the Chinese unit, which declared itself independent of ‌Nexperia's European management two months ago, to continue manufacturing Insulated-Gate Bipolar Transistor (IGBT) power chips and modules, ...