1. Guanghua technology: 20 19 On September 25th, the company said on the interactive platform that its subsidiaries normally produce and sell photoresist. 2. Tongcheng New Materials: Tongcheng Electronics, a wholly-owned subsidiary of the company, acquired 33.70% equity of Kehua Microelectronics and completed the relevant industrial and commercial change registration on July 2, 2020. Established in August 2004, Beijing Kehua Microelectronics is the only photoresist enterprise in China with Dutch ASML exposure machine, a Sino-foreign joint venture integrating R&D, photoresist production, testing and sales, and the only national high-tech enterprise with independent R&D and high-grade photoresist production capacity in China. 3. Anji Technology: According to the different application fields of photoresist downstream, the company's photoresist remover includes integrated circuit manufacturing, wafer-level packaging, LED/ OLED and other products. The company's product photoresist remover is a high-end wet chemical used to remove photoresist residues during patterning. Photoresist remover is generally composed of remover, solvent, chelating agent and corrosion inhibitor. The key is to select the remover and solvent to obtain excellent removal of cross-linked photoresist polymer; Additives such as chelating agents and corrosion inhibitors provide molecular and atomic protection for metallic and nonmetallic substrates and selectively remove photoresist residues. The core technologies of the company's photoresist remover include metal anticorrosion technology and photoresist residue removal technology in photoresist cleaning. 4. Jiejie Microelectronics: 2065438+On July 26th, 2009, the interactive platform replied that the company owns the patent of "leveling device for high-viscosity photoresist adhesive-free wires" and its subsidiary Jiejie Semiconductor owns "a set of collection device for photoresist residual glue". 5. Jacques Technology: On February 26, 2020, Jacques Technology announced that its subsidiary Siyang International Co., Ltd. signed a business transfer agreement with LGCHEM, LTD.(LGChem) to purchase some operating assets of its color photoresist department for 58 billion won (equivalent to about RMB 335 million). The underlying assets mainly include some production machinery and equipment related to the color photoresist business. 6. Gold: Ultra-micro arc oxidation technology can be applied to the surface treatment of mask aligner equipment parts and other semiconductor chip integrated circuits. 7. Pulite: Shanghai Pulite Semiconductor Materials Co., Ltd., a holding subsidiary of the company, invested 20 million yuan in Suzhou Li Shuo Technology Co., Ltd. in cash, accounting for 25% of the equity of the target company after capital increase. Li Shuo Science and Technology is located in Suzhou Nano City, Suzhou Industrial Park, Suzhou City, Jiangsu Province. Is a high-tech enterprise engaged in the research and development and production of photoresist and lithography materials for flat panel displays and semiconductor chips. Based in China, the company devotes itself to the research and development of cutting-edge lithography technology, and customizes and develops various high-end electronic-grade chemicals for China flat panel display and semiconductor chip manufacturers.