New materials: The general trend of localization is accelerating, and attention is paid to the leader of independent innovation materials

2.3 Wet electronic chemicals

Wet electronic chemicals, also known as ultra-clean high-purity reagents, are various electronic chemical materials used in the wet process of microelectronics and photoelectronics. It is mainly used for cleaning and etching of electronic components such as semiconductors, solar silicon wafers, LED and flat panel displays. It is mainly divided into general chemicals and functional chemicals by use, of which general chemicals are mainly high-purity solvents, such as hydrogen oxide, hydrofluoric acid, sulfuric acid, phosphoric acid, hydrochloric acid, nitric acid, etc. Functional chemicals refer to formulations or compound chemicals that achieve special functions and meet special process requirements in manufacturing by means of compounding, mainly including developer, stripping solution, cleaning solution, etching solution, etc.

3 Carbon fiber

Carbon fiber is a kind of fibrous carbon material with more than 90% carbon content. It is composed of organic fibers such as flake graphite microcrystals stacked along the axial direction of the fibers, and obtained by carbonization and graphitization. Carbon fiber has high specific strength, high specific modulus, creep resistance, electrical conductivity, thermal conductivity and other characteristics, strength is larger than steel, density is smaller than aluminum, corrosion resistance than stainless pot, high temperature resistance than heat-resistant steel, and can conduct electricity like copper, set excellent electrical, thermal and mechanical properties in one. World carbon fiber industrialization pattern - developed countries form technological monopoly: the earliest breakthrough in research and development and mass production of carbon fiber originated in Japan in the late 20th century, and then Japan and the United States and other countries have achieved large-scale and stable production.