The production of a Printed Circuit Board (PCB) may be achieved in a number of ways. The most common are:-

• By drawing using a etch resist pen followed by chemically etching.
• By laying transfers and chemically etching.
• By photo processing and chemically etching.

 Two further methods may also be used:-

• By directly etching, mechanically using a computer controlled router.
• By directly drawing onto copper using a plotter, followed by chemically etching.

The method adopted was that of directly plotting the tracks onto copper board and chemicaly etching. This way elliminates one stage, that of producing a mask either photographically or by using transfers.

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• Hints and tips
  
  
• Simple plot
  
  
• The HP 7475A plotter.
  
  
• File store. Protel DOS software for editing & plotting
  
  
• A PIC16F84 Emulator software
  
  
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