In microchip production the highest possible purity requirements must be fulfilled in all production processes. This also applies for the working media required for production, transport containers and distribution plants for the various production areas. The reason for this are the miniature switching circuits of the semiconductors. Furthermore, no electrically conductive particles such as metal ions or molecules must get onto the wafers or be near them. If this was the case, these particles could fill the small spaces between the strip conductors and cause a short circuit. They would also effect the electrical properties of the semiconductors and thus their function.