Humans as Source of Particles

Here a few examples of humans as source of particles. The magnification is typically low; even particles not visible under these conditions would be deadly
particles from necklace
dirt fromball penwriter
particles from nail polish
Dirt on a necklace Tip of a ball point writer A piece of nail polish on a 256 k DRAM chip
     
 
hair spray
Particles from money
skin particles
Hair with hair spray Inside of finger ring Flakes of skin

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go to 4.3.1 Cleanrooms, Particles and Contamination

© H. Föll (Semiconductor Technology - Script)