# Concentrated Piss

| According to Jim Mayer, who worked at the crucial time at Bell Labs, the abbreviation "CP" really stands for "concentrated piss" and not for "chemical polish" as is generally believed.
|  | While Jim is a colorful person, not above pulling a few legs here and there, it may well be true!
|  | The stuff does look like CP, smells bad, and is something you don't want to touch.
|  | However, while real P is asolutely harmless (some people drink it for health reason), CP is absolutely deadly if you drink it, and not much fun if you get it on your skin either.

With frame

4.2.2 Chemical Etching

© H. Föll (Semiconductors - Script)