China’s semiconductor self-sufficiency drive could face another hurdle as the United States moves ahead to widen the scope of its equipment export ban to China, analysts say. US semiconductor equipment suppliers Lam Research and KLA Corp confirmed that the US government has been pushing for stricter export regulations to China by covering equipment needed for manufacturing chips at 14-nanometre and below, according to a Bloomberg report. If that is confirmed officially, it would mark an escalation from the previous ban covering 10-nm and below – the most advanced end of chip-making technology. The new restrictions come at a time when…