People often think of contamination as particles, dust, dirt or some type of chemical residue. Lighthouse looks at contamination per the Institute of Environmental Sciences and Technology (IEST) definition: “Any foreign material or energy that has a detrimental effect on product or process.”

Examples could be:

  • Air or liquid borne particles
  • Gas phase or airborne molecular contamination
  • Electrostatic charge or electrostatic discharge
  • Electromagnetic interference
  • Fluctuations of cleanroom or minienvironment differential pressure
  • Fluctuations of cleanroom temperature & relative humidity
  • Vibration
  • Surface particles
  • Air changes