EPP Europe P2.2023

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» PCB & ASSEMBLY The 5S lean manufacturing methodology in PCB production Improve benchtop cleaning, reduce waste with 5S Developed in Japan, 5S is a workplace organisation method used in physical manufacturing to eliminate waste. Elizabeth Norwood, Senior Chemist at cleaning solutions provider MicroCare, reveals how this lean, clean philosophy can be usefully applied in benchtop cleaning practices. extremely valuable process in PCB production, and especially benchtop cleaning. Adopting the 5S lean manufacturing method can help PCB manufacturers achieve better cleaning results at the benchtop, and thus increase efficiency and yield by reducing the number of faulty components and boards that land in the scrap pile. Optimising cleaning tools and workflow will lead to increased efficiency and reduced waste Although PCB shortages may be starting to stabilise, but the electronics industry continues to feel their impact. Exacerbating this issue for PCB manufacturers is the fact that the electronic components market continues to rapidly expand – with the sector predicted to grow by USD 122.44 billion (EUR 116 billion) between 2022 and 2027, at a CAGR of 7.02%. To avoid delays, PCB fabricators must find flexible and innovative strategies to ensure production continues. Options may include modifying designs or using alternative parts, but there is a more obvious solution: increase efficiency by decreasing waste. Electronics manufacturers must implement methods to ensure every electronic component is optimally utilised. An effective way to do this is to adopt tried and tested lean manufacturing processes such as the 5S methodology. This approach benefits all kinds of production environments and can be an Source: MicroCare What is 5S? The 5S philosophy can be summed up as: ‘a place for everything and everything in its place’. The name refers to five Japanese words beginning with ‘S’ that represent a 5-step process to organize the working environment. These terms can be translated into 5 comparable English words: • Seiri/Sort: Separate tools/components that are necessary from those that are not. • Seiton/Set: Organise and categorise tools/components for ease of access and ease of use. • Seiso/Shine: Clean up the working environment. • Seiketsu/Standardise: Create standards and guidelines to uphold these practices. • Shitsuke/Sustain: Follow the first four ‘S’s on a long-term basis by always maintaining the correct procedures. Toyota first introduced something akin to the 5S methodology into its production in the 1950s – hoping to reduce manufacturing waste and inefficiency. It was discovered that by applying what later became known as the 5S concept, production ran more effectively because the workplace was clean and well-organised. This made it easier to see defects, all of which ultimately reduced waste and improved quality and output. The 5S strategy offers a large number of benefits to companies that adopt it. As well as reducing waste and optimising productivity, it also helps to enhance safety, improve quality and reduce costs. It is estimated that efficiency gains of 10% to 30% can be achieved using this method. 44 EPP Europe » 11 | 2023
5S and cleaning processes One of the main causes of PCB failure is contamination. If not cleaned sufficiently, PCBs are susceptible to many problems – from electrochemical migration and delamination to parasitic leakage, dendrite growth and shorting. Cleaning is crucial to ensuring the reliable, long-term performance of a PCB. Cleaning processes should be quick and consistent. Implementing the 5S methodology helps achieve this goal. Seiri / Sort To begin, it is essential to look at all the items on the benchtop and ask yourself the following questions: • Is this item necessary to clean the PCB and electronic components? • When was it last used? • Does it clean effectively? In this way, you can determine which items on the benchtop are required for the job. Certain tools and cleaning fluids may have worked well last year but as new designs and components are introduced, these may no longer perform as they once did. A no-clean solder paste may have been added to the assembly process and the available flux remover may not be strong enough to remove the stubborn no-clean flux white residue, for instance. Perhaps a fragile or moisture-sensitive component has been added to the design which can only be hand-soldered. Selectively soldered PCBs usually undergo ‘spot-cleaning’ at the benchtop using aerosol flux remover and a brush but if the cleaning fluids are too strong for these delicate components, they can cause damage and result in scrapped boards. A controlled cleaning fluid dispensing system is an essential tool on every PCB cleaning bench. When appropriately used, this system improves PCB cleaning results by targeting dirty areas on the board, getting under low-mounted components and permeat- Contaminated PCBs typically will not pass final inspection Source: MicroCare Messe Frankfurt Group 11 – 13.6.2024 NUREMBERG, GERMANY DRIVING MANUFACTURING FORWARD Shape the future of electronics manufacturing and become part of the community. Join us an exhibitor smtconnect.com EPP Europe » 11 | 2023 45
Page 1 and 2: Issue 11 | 2023 www.epp-europe.eu E
Page 3 and 4: » EDITORIAL Dear readers, Waste no
Page 5 and 6: The NEXT EVOLUTION of SOLDER Single
Page 7 and 8: SPECIAL Road to sustainability ASMP
Page 9 and 10: the cost of capital; 88 percent sho
Page 11 and 12: Expanding digital twin applications
Page 13 and 14: Source: Pixabay IPC August 2023 Eco
Page 15 and 16: industrial automation is also an im
Page 17 and 18: AT A GLANCE Here, Koh Young explain
Page 19 and 20: Source: Koh Young Using advanced 3D
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Page 23 and 24: to connect power inverters and tria
Page 25 and 26: Product Updates « PCB & ASSEMBLY R
Page 27 and 28: Human error and inconsistency Manua
Page 29 and 30: Easy to integrate Laser marking met
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Page 39 and 40: Forces in X direction (transport di
Page 41 and 42: Yield points of various solder past
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Page 47 and 48: PCB & ASSEMBLY « Shitsuke / Sustai
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Page 53 and 54: changes in inspection technologies
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Page 59 and 60: ecwc16 ELECTRONIC CIRCUITS WORLD CO

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