Study on UV Curing Inks for Laminates (Part 2)

3.2 Japan Photovoltaic Liquid Insulating Resin

The product is developed in alkaline developer. Its main component is a soluble phenolic epoxy resin, in addition to a photosensitive acid initiator (PAG), a photosensitizer, and an acid catalyst for cross-linking curing reactions. The photosensitive resin coating under ultraviolet light irradiation, the acid generated by the PAG to the exposed part of the curing. The post-bake is then used to generate an acid-catalyzed cross-linking reaction at the exposed sites. The unexposed resin can be removed in alkaline development to form a blind buried hole.

3.3 Enthone-OMI ENVISIONPDD-9016G-SC liquid UV curable ink

The product is soluble in water and is a photoimageable dielectric insulator material designed specifically for microcircuit products. The content of epoxy resin in PDD-9016G-SC products accounts for about 65%. In addition, aromatic amine compounds, aromatic hydrocarbon compounds and other additives are also added. Its features include:

(1) All operations are performed in the aqueous phase;
(2) Wide operating range;
(3) Short operating time;
(4) has excellent resolution, electrical and mechanical properties.

4 Conclusion

Since the rise of various non-machined micro-blind holes and buried holes in early 1990, the manufacturing and assembly technology of circuit boards has seen a major revolution after SMT. Overall, it is the advent of a new era of Build-Up Process.

According to the evaluation of the well-known N&T Information Corporation, the BUM board market worldwide was 647 million U.S. dollars in 1997, and it tripled to 1.94 billion U.S. dollars in 1999, and will continue to grow at a high rate in 2000, with an estimated value of 2.8 billion U.S. dollars and 4 billion U.S. dollars in 2001. The BUM output value accounted for 25% of the total PCB output value in 1999 and is expected to increase to about 40% in 2001. There is great room for future development.

At present, Japan, Mainland China, Taiwan Province of China, and the United States and Europe, which account for 70% of the world's total output value, are the major producers of BUM plates worldwide. Once the components can be significantly and smoothly thinned, various fine electrical products such as earphone type personal stereos, watch type midrange wireless telephones (Elder brothers), palm computers, hat-type camcorders, wall-mounted televisions and various Small medical electronic products, etc. will continue to be introduced, and the progress of BUM is unsurpassed.

Author/Zhou Liang Yang Zhuoru Xiao Jing
Information Source: Aging and Application of Synthetic Materials