Figure 13 shows that cryo pumpis cooling pump. It means thispumpis cooling, liquefaction and store air, not pumping. Generally, it has 3 processes like condensation, absorption and trap at low temperature. The cooled air or molecules do not have any momentum so it is no possibility to heat any molecules. It means vacuum.
Cryo pump have High emission velocity and high emission capacity so it
1. Cleaning
- For elimination particle
2. Deposition
- Formation some material layer on the substrate
3. Photolithography
- Formation some pattern
4. Etching
- Elimination substrate or PR layer
Material to be evaporated is heated to
increase vapor pressure
In a reasonably highvacuum, material
atoms fly to a target and stick onto the
surface
Source materi
vacuum-packing, canning, preserving in syrup, sugar crystallization, food irradiation, and adding preservatives or inert gases such as carbon dioxide. Other methods that not only help to preserve food, but also add flavor, include pickling, salting, smoking, preserving in syrup or alcohol, sugar crystallization and curing.
As the preceding paragraphs say, many kinds of food preservation technolo
About permeability importance
From the inside which will bite flowing in the water
– Gap among is connected each other and from the place which ishigh flowing with the low-end place
Is caused by with permeation and power affects in stability
(When there is permeation type, gap hydraulic pressure increase -> Effective stress decrease -> Shear strength decrease -> In stability fa
2. 표면처리 (전처리)
도료는 도장을 하기 위한 제품에 불과하며 도장 작업에 관계없이 도료의 품질에 따라 도장효과가 좋게 나타나는 것은 아니다. 도장 효과(도막 성능)에 미치는 도료의 기여도는 5%에 불과하며 나머지 95%는 여러 가지 도장에 관계되는 기타 인자 (표면처리도, 도장 환경, 도막 두께,