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Published byEgbert Shields Modified over 8 years ago
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The Conformal Coating Journey Marie Kaing Key Account Manager
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Summary History of Conformal Coating Current global market share Factors influencing industry trends Test specification evolution
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History of Conformal Coating
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50 years- Parylene (Vacuum deposition) Protection with thin layer (25-75microns) Technology reserved for high reliability military and aerospace Only the most expensive PCB coated Material + process = Too high cost
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History of Conformal Coating Electronics becoming more fragile due to: Circuit size reduction Higher component densities Increased features & capabilities Cheaper circuit costs, Constant growing need for more protection Expanded use of Conformal Coatings Developments of new technologies, new needs for new markets
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Reliability Reliability is becoming a “must have” for today’s electronic devices Demands are filtering down to everyday consumer goods Conformal Coating enable to: Reduce premature failure Provide longer warranty Enhance perception of quality What is the cost argument?
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Reliability cost Electronic for a car radio Apply a Conformal Coating: PCB size: 100mmX100mm Material volume/board: 100mmX100mmX0.050mm = 0.5cm3 Material cost/board= €0.06 Labour &equip/board = €0.02 Total approx coating cost = €0.10/board
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Reliability cost Without a conformal coating 1 field failure = €130 to replace the radio (€60 radio + €70 labour) Coating costs equate to 1 field failure in 1300 boards Coating costs equate to 0.1% of radio cost
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Evolution of Technologies Parylene Solvent based acrylic ? 5o years ago Today Tomorrow
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Conformal Coating Global Market
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Global market value of conformal coatings Source BCC Research
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Global market share by application Source BCC Research
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Market segment growth areas Automotive Industrial Controls White Goods LED signage systems Consumer electronics
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Global market share by region Source BCC Research
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Global market share by product Source BCC Research
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Factors affecting industry trends
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Factors influencing industry trends
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Cost performance expectations Cost Performance PAST FUTURE LOW cost LOW performance LOW cost HIGH performance HIGH cost HIGH performance HIGH cost LOW performance FUTURE
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Test Specifications Evolution
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Test specifications origins Standards and specifications provide benchmarks to the industry to maintain a certain level of quality on CC 1960: MIL-I-46058C 1 st conformal coating standard 1984: IPC-CC-830 commercial version of Mil spec Relatively easy to pass All conformal coatings pass MIL and IPC spec.
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Test specifications evolution Changes in specifications are being driven by: Increasing use of electronics in unusual environments. Generate industry competitiveness For example: Greater Tshock More fuels/vapors/chemicals exposure Corrosive atmospheres Higher temperature excursions
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Example of harsher test conditions MIR test: 164h 500h 1000h 1500h T-shock: 100cycles 500cycles 1000cycles 1649cycles Visual inspection done under stronger magnification ie 40X instead of 10X Total water immersion test
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IPC test IPC-CC-830 specification
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Customer test Customer specification IPC-CC-830 specification
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Individual test sequence Temperature cycle Thermal shock Humidity cycle Salt spray test Visual inspection Different boards go through each test sequence
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Cumulative test sequence Same board goes through the entire test sequence Temperature cycle Thermal shock Humidity cycle Salt spray test MIR test Visual inspection Damp heat
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Example of new test spec New CL12 test for Peugeot and Volvo: Cumulative test on PCB: Thermal shock: 500 cycles (-40C+125C) Spray test with drops of acid solution 85/85 for 1000 hours under 50V Today there is no conformal coating in the market capable of passing this new test specification
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Evolution of Technologies Parylene Solvent based acrylic ? 5o years ago Today Tomorrow
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Evolution of Technologies Parylene Solvent based acrylic UV 5o years ago Today Tomorrow WATER BASED SILICONE
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Conformal Coating trends 3 solvent free solutions UV curable: Fast curing and chemical resistance Silicone: Superior flexibility and waterproofness Water based: Dipping application Material choice is a compromise Today the perfect Conformal coating does not exist
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Thank you for your attention
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