华为7nm芯片第二条路被堵：美商务部叫停华虹设备出货！
美国商务部上周向多家芯片设备公司发出禁令信函，要求停止向中国第二大代工厂华虹的两座工厂出货特定设备和材料。Lam Research、Applied Materials 和 KLA 均被认为收到了信函，三家周二股价分别跌 3.1%、4.7%、5.8%。 商务部的顾虑是华虹旗下华力微
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