Faster = Signal Speed Development

• Switch and router
  • Internet / network interface
  • High volume, 7,000 panels/year
    • 20,000/year by 2009

• 26 layer design
  • 120.0 mils thick
  • FR406 material
  • (45) 1.0mm pitch BGA's, mostly 2 track routing

Bias glass weave

• Develop improvements to reduce fluctuation of propagation delay for woven laminates (FR4 and others) when used in high speed signal applications

Copper roughness versus signal quality

• As signal speeds increase the signal moves closer to the surface “skin depth”
• Copper roughness is an emerging area for development, rough copper degrades the signal
• Improvements must not sacrifice bond strength

High speed signals and materials selection

• Designers are being forced to consider high performance low loss materials for signal frequency bandwidths in excess of 6 GHz
• These materials must also be lead free assembly capable
• Top candidates include:
  • Low loss: Nelco -13EP
  • Very low loss: Megtron 6 (early in testing, expensive)
  • Additional materials are being improved and developed by our suppliers and evaluated by TTM