Design007 Magazine

44 The PCB Design Magazine • October 2015 layers pre-defined to get you started. Figure 3(c), is similar to Lee Ritchey's favorite stackup. This has all the good attributes that I have described, throughout this series, although 18 layers may- be overkill in some cases. But this basic configu- ration could be cut-down to 14 or 10 layers by removing groups of dual stripline layers. Be creative. You can use more layers for planes, single or dual stripline routing layers but keep them symmetrical and most importantly, watch the return paths. The layer count always increments by even numbers. So, follow the ba- sic rules I have set out in this stackup planning series and you cannot go wrong. Remember that beyond design STACKuP PLANNING, PART 4 Figure 3: image illustrating the signal/plane configuration for 12–18 layers.

• Cover
• Feature Articles — Accelerating the PCB Design Cycle
• Table of Contents
• Column — Squeezing Seconds Out of the Design Cycle
• Feature — Don't Be Held Hostage by Design Cycle Time
• Short — Whelen Engineering: The First New Captive in Decades?
• Feature — Accelerating the Design Cycle: Moving from Discipline-Centric to Product-Centric Design
• Short — Discovery about New Battery Overturns Decades of False Assumptions
• Feature — The Readers Speak: Tips on Accelerating Your Design Cycle
• Short — Superconductivity Trained to Promote Magnetization
• PCB007 Highlights
• Feature Column — Speeding up the Design Cycle: 10 Things to Remember
• Column — Stackup Planning, Part 4
• Short — Big Range of Behaviors for Tiny Graphene Pores
• Column — Avoiding the Black Spot of Negative Expectations
• Short — Back to the Future: Science Fiction Turns Science Fact
• Column — Impact of Final Plated Finish on PCB Loss
• Short — How Leaky is Your Device?
• MilAero007 Highlights
• Article — The Gerber Guide, Chapter 3
• Article — Analyzing Condensation and Evaporation in Headlights with Thermal Simulation
• Short — Energy Out of Thin Air
• Top Ten Recent Highlights from PCBDesign007
• Events Calendar
• Advertiser Index and Masthead