Cleanrooms and equipment

Which item, placed on the floor at cleanroom entrances and elsewhere, removes dust stuck to shoe soles?

  1. AGrating
  2. BSticky mat (tacky mat)
  3. CFFU
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Answer: B. Sticky mat (tacky mat)

A sticky mat has an adhesive surface that removes dust from the shoe soles and cart wheels that step on it. When it gets dirty, the top sheet is peeled off to expose a fresh surface. Placed in anterooms and at cleanroom doorways, it reduces dirt carried in from outside.

  • A. A grating is a perforated floor panel that lets air pass under the floor.
  • B. Correct. It removes dust from shoe soles with an adhesive surface.
  • C. An FFU is a unit that blows clean air from the ceiling.
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More Cleanrooms and equipment questions

  1. Which statement about the amount of particles shed by cleanroom workers is correct?
  2. As circuits are scaled down, how does the size of particles that must be controlled in the cleanroom change?
  3. What is the main reason wafers must not be touched with bare hands?
  4. Which statement about ISO 14644-1 cleanliness classes is correct?
  5. Which type of cleanroom blows clean air from parts of the ceiling and maintains cleanliness by mixing with and diluting the room air? Its cleanliness is lower than with unidirectional flow, but its equipment cost is lower.