PCB process is relatively complicated
The main substrate of smt PCB assembly is CCL, which is CCL. CCL is composed of glass fiber, copper foil and resin. The PCB process is relatively complicated. First, it is necessary to make the inner circuit board, which mainly includes materializing, coating, exposing, developing, etching and film-removing. After the inner layer is completed, the pressing is performed, and the pressing process includes browning-pre-stacking-pressing, and then the laminated multilayer inner layer is subjected to drilling, copper immersion, electroplating, development, etching, and film detachment.

Electronic chemicals throughout the PCB production process
PCB chemicals can be divided into four categories based on their use:
Substrate chemicals;
Photographic photoresist and screen printing ink for line imaging;
Electroplating chemicals;
Compounds required for development and etching;
PCB chemicals run through the entire production process.

From the demand side, global PCB demand has achieved steady growth, and domestic growth rate is higher than the global
In 2015-2016, due to factors such as the slowdown in sales of personal computers and smartphones, the PCB market scale declined slightly for two consecutive years. In 2017, global PCBs resumed growth. The PCB market size in 2017 is expected to reach US$58.84 billion, up 8.6% year-on-year. China's PCB market is expected to reach US$29.73 billion, up 9.6% year-on-year, higher than the growth rate of the global PCB market. We expect that the PCB market is expected to achieve steady growth in the future driven by factors such as increased demand for automotive electronics.

From the supply side, environmental protection is becoming stricter, and it is expected to accelerate the elimination of backward production capacity of PCB chemicals.
After years of development of domestic PCB chemicals, product quality has gradually shortened the distance from foreign chemicals, but high-end products are still monopolized by European, American and Japanese Koreans. We believe that materials with low technical barriers such as epoxy resin, wet electronic chemicals, and some photoinitiators and inks are gradually localized, but there are waste water, waste gas, waste residue and noise pollution in the production of PCB electronic chemicals. Taking epoxy resin as an example, a large amount of wastewater with high salinity and high organic content will be produced during the production of epoxy resin. The pollutants mainly include epichlorohydrin, volatile phenol, benzene, toluene, etc., salt content 5-14 %, organic pollutant content of up to 50000mg / L. The discharged atmospheric pollutants also include toluene, xylene, and epichlorohydrin. Due to many environmental problems in the production process of PCB electronic chemicals, the environmental protection will accelerate the elimination of backward production capacity and help the price of products rise. Leading companies are expected to benefit first.

At present, from the demand side, driven by factors such as increased demand for automotive electronics, the global PCB market has grown steadily, and the domestic PCB market has grown faster than the global market. From the supply side, the environmental protection is becoming stricter, and the backward production capacity of PCB electronic chemicals is facing elimination. The domestic PCB electronic chemicals industry is expected to be further concentrated in large factories, and domestic leading enterprises will benefit first.

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