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Current IssueThe Hole Truth: Via Integrity in an HDI World
From the drilled hole to registration across multiple sequential lamination cycles, to the quality of your copper plating, via reliability in an HDI world is becoming an ever-greater challenge. This month we look at “The Hole Truth,” from creating the “perfect” via to how you can assure via quality and reliability, the first time, every time.
In Pursuit of Perfection: Defect Reduction
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An Examination of Glass-fiber and Epoxy Interface Degradation in Printed Circuit Boards
July 12, 2019 | Bhanu Sood, Michael Osterman, and Michael Pecht, Center for Advanced Life Cycle EngineeringEstimated reading time: 9 minutes
1. Lathi, J.N., Delaney, R.H., and Hines, J.N. “The Characteristic Wear-out Process in Epoxy Glass Printed Circuits for High Density Electronic Packaging,” Reliability Physics 17th Annual Proceeding, pp. 39–43, 1979.
2. Sood, B., and Pecht, M. “Conductive filament formation in printed circuit boards: effects of reflow conditions and flame retardants,” Journal of Materials Science: Materials in Electronics, 22:1602–1615, 2011.
3. Rogers, K., Hillman, C., Pecht, M., and Nachbor, S. “Conductive Filament Formation Failure in a Printed Circuit Board,” Circuit World, Vol. 25 (3), pp. 6–8, 1999.
4. Lando, D.J., Mitchell, J.P., and Welsher, T.L. “Conductive Anodic Filaments in Reinforced Polymeric Dielectrics: Formation and Prevention,” Reliability Physics 17th Annual Proceeding, pp. 51–63, 1979.
5. Domeier, L., Davignon, J., and Newton, T. “A Survey of Moisture Absorption and Defects in PWB Materials,” Proceedings of the 1993 Fall IPC Meeting, pp. 3–5, 1993.
6. William, V. “Conductive Anodic Filament Resistant Resins,” Proceedings of the IPC Printed Circuits Expo, 2002.
7. Mack, H. “Choosing the Right Silane Adhesion Promoters for SMP Sealants,” Adhesive and Sealant Council Meeting in Orlando, Florida, 2001.
8. Rogers K. “An analytical and experimental investigation of filament formation in glass/epoxy composites,” ProQuest Dissertations and Theses, 2005.
9. Materne, T., de Buyl, F., and Witucki, G.L. “Organosilane Technology in Coating Applications: Review and Perspectives,” Dow Corning S.A. and Dow Corning Corporation, 2006.
10. Plueddemann, E. P. In Proc. ICCI-II. “Interfaces in polymer, ceramic, and metal matrix composites,” Hatsuo Ishida, Ed., pp. 17–33, 1988.
11. Hodzic, A., Kim, J. K., and Stachurski, Z. H. Polymer 42:5701-5710, 2001.
12. Gurumurthy, C. K., Kramer, E.J., and Hui, C.Y. “Hydro-Thermal Fatigue of Polymer Interfaces,” Acta Materialia, Vol. 49, pp. 3309–3320, 2001.
13. Ritter, J. E., and Huseinovic, A. “Adhesion and Reliability of Epoxy/Glass Interfaces,” Journal of Electronic Packaging, Vol. 123, pp. 401–403, 2001.
14. Leung, S.Y.Y., Lam, D.C.C., and Wong, C.P. “Experimental Investigation of Time Dependent Degradation of Coupling Agent Bonded Interfaces,” IEEE Electronic Components and Technology Conference, 2001.
Page 3 of 3Suggested Items
The Evolution of Picosecond Laser Drilling
06/19/2025 | Marcy LaRont, PCB007 MagazineIs it hard to imagine a single laser pulse reduced not only from nanoseconds to picoseconds in its pulse duration, but even to femtoseconds? Well, buckle up because it seems we are there. In this interview, Dr. Stefan Rung, technical director of laser machines at Schmoll Maschinen GmbH, traces the technology trajectory of the laser drill from the CO2 laser to cutting-edge picosecond and hybrid laser drilling systems, highlighting the benefits and limitations of each method, and demonstrating how laser innovations are shaping the future of PCB fabrication.
Day 2: More Cutting-edge Insights at the EIPC Summer Conference
06/18/2025 | Pete Starkey, I-Connect007The European Institute for the PCB Community (EIPC) summer conference took place this year in Edinburgh, Scotland, June 3-4. This is the third of three articles on the conference. The other two cover Day 1’s sessions and the opening keynote speech. Below is a recap of the second day’s sessions.
Day 1: Cutting Edge Insights at the EIPC Summer Conference
06/17/2025 | Pete Starkey, I-Connect007The European Institute for the PCB Community (EIPC) Summer Conference took place this year in Edinburgh, Scotland, June 3-4. This is the second of three articles on the conference. The other two cover the keynote speeches and Day 2 of the technical conference. Below is a recap of the first day’s sessions.
Preventing Surface Prep Defects and Ensuring Reliability
06/10/2025 | Marcy LaRont, PCB007 MagazineIn printed circuit board (PCB) fabrication, surface preparation is a critical process that ensures strong adhesion, reliable plating, and long-term product performance. Without proper surface treatment, manufacturers may encounter defects such as delamination, poor solder mask adhesion, and plating failures. This article examines key surface preparation techniques, common defects resulting from improper processes, and real-world case studies that illustrate best practices.
RF PCB Design Tips and Tricks
05/08/2025 | Cherie Litson, EPTAC MIT CID/CID+There are many great books, videos, and information online about designing PCBs for RF circuits. A few of my favorite RF sources are Hans Rosenberg, Stephen Chavez, and Rick Hartley, but there are many more. These PCB design engineers have a very good perspective on what it takes to take an RF design from schematic concept to PCB layout.