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At the beginning of August, Toshiba introduced a green computer NAPA notebook with a halogen-free and flawless circuit board, which fully realized lead-free soldering technology. At the same time, Chunlan Company also carried out lead-free transformation of the newly built 8 air-conditioning production lines, 3 air-conditioning compressor production lines and the original 4 washing machine production lines, focusing on the upgrading of welding equipment.
The domestic mobile phone brand "Ban" also achieved 75% lead-free production in mid-June, and completed lead-free deployment from production line to product.
It is not difficult to see from the changes in the deployment of welding technology in many enterprises. With the European WEEE regulations requiring the phase-use of lead in electronic soldering to be phased out before July 2006, TCL, Panasonic, Archos, Samsung and other brand-name products are in order to comply. Green standards have incorporated lead-free soldering technology into the production lines of mainstream products.
Undoubtedly, lead-free soldering technology has experienced rapid growth in China, and it has gradually begun to spread widely in the soldering industry, but this technology has also ushered in new challenges.
Technology faces new issues
Lead-free is a long-term process and is still in the period of coexistence with lead. Lead pollution is still a difficult problem to solve during this period. The technicians of a welding company believe that there are many welding equipments in China and many foreign brands. The relevant information can be easily found on the Internet. This technology has been used for several years, but lead-free soldering is still a new topic for the entire SMT process, because there are still many problems in the process of reliability, stability and the scope of the process window. solve.
From a technical point of view, lead-free soldering because of the high melting point of lead-free solder paste, it is necessary to adjust other components, so it is not just a simple welding process or equipment replacement, but to consider whether product design needs Changes, how to adjust the process parameters and other comprehensive factors.
Some technicians believe that almost all manufacturers now claim that their equipment fully meets the requirements of lead-free soldering, but compared with lead-based equipment, it only increases the total effective heating length, but the specific thermal efficiency and temperature curve effect is difficult. Judge. Some users report that it is best to do an actual test at the manufacturer's site, and also look at the management of the manufacturer's production process.
Lead-free is not a day's work
Although lead-free soldering technology has matured, many SMEs lack confidence in the promotion of lead-free products.
One expert believes that lead is mainly used for welding technology. If there is no lead, the stability will be affected. The lead-free soldering technology involves the control of the enterprise supply chain system, the upgrading of equipment and the research and application of new technologies. Therefore, the cost of testing is high. According to the survey, some lead materials for lead-free soldering will increase in price. For example, the price of lead-free solder paste is 2.2 times that of lead; no-clean solder wire: the price of lead-free is 1.48 times that of lead; the cleaning agent: the price of lead-free is 2.38 times that of lead. Overall assessment, lead-free will bring a substantial increase in costs.
It is understood that some companies have spent hundreds of thousands of dollars to purchase new equipment in response to the RoHs directive, and the cost of the product itself has increased by 5% to 10%.
A small business electronics manufacturer is very difficult to do this, he said, “Our advantage is that it is 'low price', but due to the substantial increase in production costs, to maintain the existing profits, you have to raise prices. This will undoubtedly weaken With the competitiveness of our products and foreign products, low-tech products will gradually withdraw from the European market. At present we have to give up some European markets and transfer these products to African and domestic markets."
Of course, it is not a day's work for products to be completely "lead-free". Although they are facing technical and financial problems, the successful development of lead-free products such as Panasonic and Chunlan has become the future of lead-free soldering technology. Opened a bright door.
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