云南锗业：公司控股子公司主营业务为磷化铟晶片（衬底）、砷化镓晶片（衬底）的生产、销售

Core Viewpoint - Yunnan Zheye (002428) is focusing on the production and sales of indium phosphide and gallium arsenide wafers through its subsidiary, Yunnan Xinyao Semiconductor Materials Co., Ltd, while facing uncertainties in scaling up to larger wafer sizes [1] Group 1: Company Operations - The main business of Yunnan Xinyao includes the production and sales of indium phosphide and gallium arsenide wafers [1] - Currently, the actual sizes of indium phosphide wafers used by downstream customers range from 2 to 4 inches, with a focus on 2-inch and 3-inch wafers in China [1] Group 2: Future Development - The company is conducting research and development for larger wafer sizes to meet future market demands, but there are significant uncertainties from R&D to mass production [1] - There are no specific plans for the mass production of 6-inch indium phosphide wafers at this time, and any future plans will be disclosed publicly if they arise [1] Group 3: Market and Technical Challenges - The transition to larger wafer sizes is influenced by various factors, including technological breakthroughs across the entire industry chain, process reliability, costs, capacity, policies, and market conditions [1] - The company will consider related plans under the premise of manageable market and technical risks [1]