The MG Chemicals Professional Prototyping Process Introduction ..................................................................................................................................................................3 Before you begin ..........................................................................................................................................................4 Read the instructions in their entirety.......................................................................................................................4 Get everything you need...........................................................................................................................................4 Plan for safety...........................................................................................................................................................5 Plan for disposal .......................................................................................................................................................5 Design your circuit for the MG process ...................................................................................................................6 Step 1: Cutting and Routing .........................................................................................................................................6 Ingredients required..................................................................................................................................................6 Overview: .................................................................................................................................................................6 Step 2: Drilling, Deburring, and Reaming ...................................................................................................................6 Ingredients required..................................................................................................................................................7 Overview ..................................................................................................................................................................7 Creating the drilling pattern......................................................................................................................................7 Drilling the holes......................................................................................................................................................7 Deburring and reaming.............................................................................................................................................7 Step 3: Electroless Copper Plating ...............................................................................................................................8 Ingredients required..................................................................................................................................................8 Overview: .................................................................................................................................................................9 Cleaning the board....................................................................................................................................................9 Setting up the solutions ............................................................................................................................................9 Immersing the board sequentially in each solution ................................................................................................11 Step 4: Resist Application, Exposure, and Development...........................................................................................12 Ingredients required................................................................................................................................................12 Overview: ...............................................................................................................................................................13 Printing the circuits on transparencies....................................................................................................................13 Creating a safelight environment............................................................................................................................13 Application .............................................................................................................................................................14 Exposure.................................................................................................................................................................14 Development ..........................................................................................................................................................15 Step 5: Copper Electroplating ....................................................................................................................................15 Ingredients required................................................................................................................................................15 Overview: ...............................................................................................................................................................16 Calculating the required current .............................................................................................................................16 Micro-etching the board .........................................................................................................................................17 Setting up the electroplating tank...........................................................................................................................17 Copper Electroplating.............................................................................................................................................17 Clean up..................................................................................................................................................................18 Step 6: Tin Electroplating...........................................................................................................................................18 Ingredients required................................................................................................................................................18 Overview: ...............................................................................................................................................................19 Setting up the electroplating tank...........................................................................................................................19 Tin Electroplating...................................................................................................................................................19 Clean up..................................................................................................................................................................20 Step 7: Resist Stripping ..............................................................................................................................................20 Ingredients required................................................................................................................................................20 Overview: ...............................................................................................................................................................20 Procedure:...............................................................................................................................................................20 Step 8: Copper Etching...............................................................................................................................................21 Ingredients required................................................................................................................................................21 1 Overview: ...............................................................................................................................................................21 Instructions .............................................................................................................................................................21 Step 9: Tin Stripping ..................................................................................................................................................22 Ingredients required................................................................................................................................................22 Overview: ...............................................................................................................................................................22 Procedure................................................................................................................................................................22 Step 10: Solder Mask Application..............................................................................................................................22 Ingredients required................................................................................................................................................22