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92 PCB007 MAGAZINE I JANUARY 2019 solvent system improved penetration on the high-Tg material, enabling the permanganate to increase the degree of resin removal and sufficiently roughen the resin to enhance the subsequent adhesion of the metalization layer. When the optimal solvent swell/permanganate system is utilized, you can expect the topography imparted to the resin (Figure 5). Summary Never assume that one desmear system or a single set-up will be sufficient for all types of resin systems and under all lamination conditions. In some cases, combinations of plasma and permanganate may be required. Regardless, ensure a clean capture pad and sufficient surface roughness for plating adhesion. PCB007 Michael Carano is VP of technology and business development for RBP Chemical Technology. To read past columns or contact Carano, click here. Figure 5: Alkaline permanganate with modified solvent swell with well-defined topography. The global printed circuit board (PCB) market was valued at $60.42 billion 2017 and is expected to reach $80.38 billion by 2024, at a CAGR of 4.2%. Factors driving the growth of the market are: rising adoption of automation in various end-user industries, growing demand for wireless devices, increasing miniaturization of devices, surging need for more efficient interconnect solutions, and rapid growth in flexible circuits. Owing to the implementation of processors and sensors in smart gadgets, the size of the PCB has reduced to 74%. Additionally, usage of flame retardant chemicals in PCBs to ensure fire safety, and increasing capital investment is further augmenting the market growth. Moreover, huge growth in global PCB market is also led by the increasing demand for smart tablets and smart phones in IT and consumer electronics sector. Growth in wearable electronics is emerging as a Global PCB Market to Witness a CAGR of 4.2% during 2018-2024 key opportunity in the growth of the global PCB market. With the rapid development in technology, electronics products will continue to emerge. But, massive production of PCB is becoming unfriendly to environment, due to the usage of wet chemicals while manufacturing. Moreover, lack of recycling ability also degrades the adoption rate of printed circuit boards. And to ensure less toxic emissions into the environment, inkjet printing technology is invented. This technology enables the cost-effective manufacturing of thin, flexible and disposable electrical devices. Moreover, Taiwan-based manufacturer (Wistron) is also looking to relocate a PCB manufacturing plant in Bengaluru, and has invested about $1 billion. Global Printed Circuit Board (PCB) Market — Regional Insight Geographically, the global printed circuit board market is segmented in Asia-Pacific, North America, Europe, and Rest of the World. Asia-Pacific is dominating the global PCB market in 2017 (77%), followed by North America. The growth in APAC region is attributed to the presence of many semi-conductor manufacturers, growing adoption of smart devices. North America is expected to hold the second largest market during the forecast period. (Source: Globe Newswire)