Due to the combination of the flexible circuit board and the hard board, it can replace the traditional connector, which not only improves the stability of the circuit, but also reduces the design height and weight of the mobile phone. The PI Cover Layer (covering film) used to protect the cable on the current flexible circuit board can be replaced by high-quality flexible ink that is resistant to flexing, which can greatly reduce the cost of mobile phones.
However, in the past, the dominance of soft circuit board materials was controlled by Japanese manufacturers. Taking soft solder resist ink as an example, Taiwan's self-sufficiency rate is less than 10%. Based on material cost considerations, flexible circuit board manufacturers hope to receive support from Taiwan-based material suppliers, and Taiwan-based material factories also hope to gain material autonomy. After years of hard work, Taiwanese factories have begun to show results. Among them, soft ink suppliers such as Guanpin Chemicals have been adopted by 80% of Taiwan’s soft board factories. The company’s soft solder mask ink can replace the cover layer. Not only is it extremely resistant to flexing, it will not crack after multiple flexing, and it can withstand high temperatures even up to 400 degrees Celsius.
Zheng Chuanghuang, Associate Associate of Guanpin Chemical Business Department, said that the company's soft ink is a thermosetting soft rubber soft ink. In addition to its solder resist function, it also has surface heat dissipation characteristics. When used to replace the PI cover film, the soft ink will fully wrap the flexible cable, so that the flexible ink extension protection will not break when the cable is bent. The heat dissipation characteristics of the crown soft ink will dissipate the heat energy of the current flowing on the line through the ink from the surface layer, which can improve the signal stability of the circuit. Now the company's soft ink has been designated as a dedicated mobile phone soft plate ink by several mobile phone brand manufacturers, and began to carry out the integrated development of other applications.