ACCIS Automated Conformal Coating Inspection System Presentation

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A presentation on ACCIS an Automated Conformal Coating Inspection System developed by SCH Technologies.

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ACCIS Automated Conformal Coating Inspection System Presentation

  1. 1. ACCIS Automated Conformal Coating Inspection
  2. 2. <ul><li>Who are SCH? </li></ul><ul><li>Based in South Yorkshire, UK </li></ul><ul><li>UK conformal coating service </li></ul><ul><li>UK Humiseal materials </li></ul><ul><li>Manufacturer of equipment </li></ul>
  3. 3. What is coating inspection? <ul><li>Inspection is used to determine correct application of conformal coating: </li></ul><ul><li>Coating in the right areas </li></ul><ul><li>Areas not to be coated / to be coating free </li></ul><ul><li>Correctly applied coating i.e. defect free </li></ul>
  4. 4. Typical Coating Inspection
  5. 5. Conformal Coating Standards <ul><li>There are several standards: </li></ul><ul><li>IPC-CC-830B manufacturers standard </li></ul><ul><li>IPC-A-610 Inspection criteria </li></ul><ul><li>IPC-HDBK-830 Handbook for conformal coating </li></ul>
  6. 6. Standard IPC-A-610 requirements... <ul><li>No loss of adhesion </li></ul><ul><li>No voids or bubbles </li></ul><ul><li>No de-wetting, mealing, peeling, wrinkles, cracks, ripples, fisheyes or orange peel </li></ul><ul><li>No embedded / entrapped foreign material </li></ul><ul><li>No discolouration or loss of transparency </li></ul>
  7. 7. Inspection Standards Examples
  8. 8. Inspection Issues <ul><li>Manual process – prone to error by operator </li></ul><ul><li>Different standards between operators </li></ul><ul><li>Time consuming </li></ul><ul><li>No traceable recording of inspection </li></ul>
  9. 9. Solution - Automated Inspection <ul><li>Automated process – repeatable results </li></ul><ul><li>The same standard across all boards </li></ul><ul><li>High speed multiple board inspection </li></ul><ul><li>Traceable data of inspection stored </li></ul>
  10. 10. ACCIS - Automated Conformal Coating Inspection System <ul><li>Batch and SMEMA inline inspection processing </li></ul><ul><li>High speed multiple board inspection </li></ul><ul><li>Traceable data from inspection stored </li></ul>
  11. 11. ACCIS - Automated Conformal Coating Inspection System <ul><li>Confirmation of correctly applied coating </li></ul><ul><li>Detection where coating should not be </li></ul><ul><li>Identifies defects such as cracks, de-lamination and de-wetting </li></ul>
  12. 12. ACCIS – Example <ul><li>Application by selective robot system </li></ul><ul><li>High volume high speed application </li></ul><ul><li>Critical keep out areas </li></ul>KEEP OUT ZONES
  13. 13. ACCIS – Example <ul><li>Stage 1: </li></ul><ul><li>Image is captured under controlled UVA light set up </li></ul>
  14. 14. ACCIS – Example <ul><li>Stage 2: </li></ul><ul><li>Image is converted to greyscale using the software </li></ul><ul><li>Software checks for keep out areas for correct processing </li></ul>
  15. 15. ACCIS – Example <ul><li>Example of a badly coated PCB </li></ul>
  16. 16. ACCIS – Further Example
  17. 17. ACCIS – Further Example
  18. 18. ACCIS – Further Example
  19. 19. ACCIS – Standard System <ul><li>Uses TOM (Teachable Object Module) software for easily defined inspection </li></ul><ul><li>Allows varied board types and sizes to be tested </li></ul><ul><li>Easy to use GUI allows quick definition of where coating coverage should and should not be </li></ul><ul><li>With the built in identification algorithms, different defect types can be identified </li></ul>
  20. 20. ACCIS – Standard System System Capabilities Batch System Standard board size: 350 x 250mm SMEMA Inline System Standard board size: 350 x 250mm (Alternate set ups for larger fields available)
  21. 21. Any questions....?

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