1. ESD Control In Electronic Assembly Tom Watkins President Transforming Technologies

3. Effects of Static Charge

4. Physical damage

5. Contamination

6. Automation issues

7. Elements of ESD Control

8. Ionization

9. Ionizer Maintenance

12. Manual or Automated Handling ++++++ ++++++

13. Sources of TribochargingContact and Separation of Dissimilar Materials Product handling Tweezers Robots Rollers Suction cups Parts on reel Wet Processes Wipe Down Personnel In chairs On floor Against walls Product Storage In/Out of carriers Moving across work surfaces Plastics Packing material Plastic Sheet protectors

14. Latex Human Hands Quartz Nylon Aluminum Chrome Steel Polyurethane Polyethylene Polypropylene PVC (Vinyl) Polycarbonate Mylar Teflon Positive + Negative - Triboelectric Charging Charge generation: The Materials Used Encourage Transfer: Triboelectric Charging

15. Problems Related to Static Charge Electrostatics and Physical Damage

16. Fields from Static Charge Cause Micro Electronics to Spark and Die

17. Damage Can Happen Several Ways Charged operator contacts part (called HBM) Charged part contacts ground (Called CDM) ` Charged object (tool) contacts part (Called MM) `

18. Understanding the Three Models

19. Electrostatics and Contamination

20. Static Charge is a Contamination Issue Charged surfaces attract contamination strongly

21. Contaminated Contacts Makes Testing Unreliable

22. Electrostatics and EMI

28. Ionization

32. Used in most assembly applications

33. Requires no balance adjustment

34. Cleaning required only infrequently

35. Simplicity means reliability!

36. Separating points minimizes recombination

37. Used in ultra clean applications

38. Requires periodic adjustment of balance

39. Requires frequent cleaning

41. AC Technology Inherently balanced requiring NO adjustment Infrequent cleaning requirements compared to DC technology Transforming Technology’s ionizers have quick release grids or built in cleaner to minimize the time to clean an ionizer

43. Very light weight

44. High frequency virtually eliminates any swing

45. Use to 6” from product

46. Removable grilles for easy cleaning

47. Conventional AC

48. Transformer weight requires stiffer mounting bracket

49. Offers faster discharge

50. Use to 12” from product

51. Built in cleaning tool

53. These Bench Top Blowers Work Well in Workstations Inspection stations and microscopes Automated process steps Tester stations and Probe stations

55. Eliminates Dry Eyes – operators prefer overheads!

56. Not blocked by Obstacles on the Work Surface

61. Fast Discharge Time

63. Unique Air Nozzle Ionizer for Directed Flow Delivers the ions to a precise location Ideal for manual assembly of small subassemblies Foot switch for hands free operation IN4000

64. Measuring Ionizer Performance

65. Ionizers Require Cleaning and Some Also Require Adjustment

68. Material choiceEducation

69. Class Zero Control

70. Modern High Tech Products Are Extremely Sensitive To ESD

71. Conclusion Static charge is a normal consequence of any component handling process. The ESD hazard to ICs continues to increase as devices become more complex Grounding and ionization are the static control methods employed to eliminate static charge Ionizer maintenance is an important issue and must be considered when selecting an ionizer. Customers now require control of static charge levels to 100 volts or less.