Topic:
Glossary: W
Here you are going to find explications of important terms in plasma technology:
- wafer etcher
- Plasma installation for etching silicon wafers.
- water varnish
- For water varnish, the main solvent and dilatant is water. Besides, about ten percents organic solvents and diluting agents are added. The binders of water varnishes are epoxies such as polyurethane, polyester, alkyd, and acrylate resins. Water varnishes are generally processed like other resins. In addition, the drying time is longer. Water varnishes are dilutable with water, but rests or the varnish have to be disposed as hazardous waste because of the solvent content and the preservatives.
- wettability
- Wettability means a solid body’s property to accept a second material, e.g. a coating. By definition, wetting is a process where a solid body’s surface that used to abut on a gas phase gets in touch with a liquid. In order to determine the wettability, a measurement of the contact angle can be executed which makes it possible to determine the surface tension. If there is an objectionable wetting problem, the wettability can be improved by means of a suitable plasma treatment under atmosphere or in vacuo in order to enable e.g. gluing, printing, and varnishing.
- wetting
- see “wettability”
- wetting angle
- see "contact angle"
- wetting problem
- see “wettability”
