三安光电(600703.SH)：12吋碳化硅衬底尚处于研发阶段，已生产出工程样品

Group 1 - The core point of the article is that Sanan Optoelectronics (600703.SH) is currently in the research and development phase for its 12-inch silicon carbide substrates, having produced engineering samples and is focused on equipment debugging, improving yield rates, and product performance [1]