The advantage of vacuum deposition is that it's possible to make veryhigh-quality films, which result in materials with higher conductivity.
真空沉积法的优势在于它可以制出高品质的薄膜,从而成为高导电性的材料。
2
As the Roots pump is a non-vacuum inside the compression, the compression ratio is usually very low, so high, medium and vacuum pumps need to pump before.
由于罗茨泵是一种无内压缩的真空泵,通常压缩比很低,故高、中真空泵需要前级泵。
3
Dry running linear diaphragm pumps. Two means of actuation: linear and vibrating armature. Veryhigh life time, low noise level and high efficiency. Used as compressors and vacuum pumps.