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PCB Design Basics
Engineering Innovation Center – EIC
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Engineering Innovation Center – EIC
What is PCB Design?
• Creation of Schematics
• Layout of Components
• Routing of Traces
Involves the use of CAD software!
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Engineering Innovation Center – EIC
Eagle – Modules
• Schematic Editor
• Layout Editor
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Engineering Innovation Center – EIC
Eagle – Modules
• Autorouter
– Leaves a mess
– Lots of setup
– In most cases, Doesn’t save time
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Engineering Innovation Center – EIC
Eagle – Integration
• Schematic Part and Footprint
• Back Annotation
• Library Editor
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Engineering Innovation Center – EIC
Schematic Capture
• Logical Flow
• Use Net Ports
• Decoupling Capacitors
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Engineering Innovation Center – EIC
PCB Layout
• Layer Stackup
• Material Considerations
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Engineering Innovation Center – EIC
PCB Layout
• Group by Function
• Watch Spacing (Soldering!)
• Flow
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Engineering Innovation Center – EIC
Trace Routing
• Current Capacity
– Trace Width
– Copper Thickness
• Voltage Isolation
– Distance (Clearance/Creepage)
– Environment
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Engineering Innovation Center – EIC
Trace Routing
• Signal Integrity
– Short Traces
– No Right Angles
• Coupling
– Parallel Traces
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Engineering Innovation Center – EIC
Trace Routing
• Ground Planes
– They’re that important
– A ground plane on a printed circuit board (PCB) is a large area or layer of copper foil connected to the circuit's ground point, usually one terminal of the power supply. It serves as the return path for current from many different components.
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Engineering Innovation Center – EIC
Design Rule Check (DRC)
• DRC
– Enforces Specifications
– Helps Prevents Mistakes
• Specifications
– Clearance / Trace Width (Track/Gap)
– Drill Size / Annular Ring
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Engineering Innovation Center – EIC
Design Rule Check (DRC)
Annular Ring
Drill Size
Trace Width
Clearance
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Engineering Innovation Center – EIC
Fabrication
• Production
– Milling VS Chemical Etch VS Laser
– Through Hole Plating
• Submission
– Gerber Files (Layers)
– NC Drill File
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Engineering Innovation Center – EIC
Fabrication
• Generate Files
– Eagle - ‘Cam Processor’
– Check files first!
• Submission
– EIC Specifications Online
– Google Form Submission – ‘Prototyping Request’