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Aging effect for Dk/ Df Dielectric constant (Dk) Time (hrs) Measurement method：Balanced type circular disk resonance method Aging Temperature：125℃ (without humidity control) Measurement frequency：18GHz 0 200 400 600 800 1000 1200 Time (hrs) 0 200 400 600 800 10001200 3.0 3.2 3.4 3.6 3.8 Dissipation factor (Df) 0.002 0.003 0.004 0.005 0.006 R-5575 R-5575 Other company Other company

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• Column — (Signal) Integrity for All
• Short — New IPC Studies Show World PCB Market up in 2016 as North American Market Shrinkage Slows
• Feature Column — Planning a PCB: Signal Integrity and Controlled Impedance Considerations
• Feature Column — Fabricating for Signal Integrity
• Supply Lines Highlights
• Feature — Experts Discussion: Signal Integrity and Impedance Control
• Feature — PCB Signal Integrity Optimization Using X-ray Metrology
• EIN Market Highlights
• Feature — HDI's Beneficial Influence on High-Frequency Signal Integrity
• Column — The Critical Importance of Rinsing, Part 2
• Short — Bringing Signals into Phase
• Column — Become an Expert!
• MilAero007 Highlights
• Column — Steve's Particular Set of Skills (to become a World-Class Quality Manager)
• Column — Pursuing New Solutions to the Electronics Sectors' Skills Gap
• Top Ten Recent Highlights from PCB007
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• Advertiser Index and Masthead