无转移高品质石墨烯晶圆,衬底为蓝宝石,1层(单层率90%以上),透光率85.7%,4英寸 , 4英寸
High quality graphene wafer without transfer, substrate is sapphire, 1 layer (single-layer rate more than 90%), light transmittance 85.7%, 4 inches, Four inches
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