IT 318: M12 PWB Manufacturing IT 318 - M11.

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Presentation transcript:

IT 318: M12 PWB Manufacturing IT 318 - M11

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 IT 318 - M11

BT = Bismaleimide-Triazine, an epoxy resin PTFE = PolyTetraFluoroEthylene, or Teflon IT 318 - M11

IT 318 - M11

PWB: Basic Construc-tion IT 318 - M11

Vias IT 318 - M11

PWB: What is this? IT 318 - M11

PWB: What is this? IT 318 - M11

COB (Chip-on-Board): Why do this? IT 318 - M11

COB (Chip-on-Board): Why do this? IT 318 - M11

Glob-tops: Why do this? IT 318 - M11

But watch out for this! IT 318 - M11

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 318 - M11

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