1. IT 318: M12
PWB Manufacturing
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2. PWB: Functions Mechanically fix components in place (solder primarily)
Electrically connect components (solder, again; and PWB lands)
Electrically separate individual signals, voltages (dielectric)
Remove heat and spread it out
Provide testability
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3. BT = Bismaleimide-Triazine, an epoxy resin
PTFE = PolyTetraFluoroEthylene, or Teflon
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4. IT M11

5. PWB: Basic Construc-tion
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6. Vias
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7. PWB: What is this?
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8. PWB: What is this?
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9. COB (Chip-on-Board):
Why do this?
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10. COB (Chip-on-Board):
Why do this?
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11. Glob-tops:
Why do this?
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12. But watch out for this!
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13. PWB: Challenges Lower costs, especially multi-layer PWBs
Lower dielectric constant materials (higher frequencies)
Higher thermal conductivity materials
Finer resolution for IC pins/leads
IT M11