亚洲国产欧美中文丝袜日韩,欧美日韩精品成人网视频,国产人妻精品午夜福利免费不卡,亚洲中文字幕久久精品无码2021,国产99视频精品免费视频6

Empty coating will encounter film drop. What is the reason for this situation and how to solve these problems?
1. Surface cleanliness
The surface cleanliness of the product is not enough, you can consider argon amplification and longer time when cleaning the ion source.
2. Problems in the cleaning process
The cleaning was not in place before plating, or the cleaning solution was replaced.
3. The problem of craftsmanship
Whether the process parameters have changed, make appropriate adjustments in the coating time and current.
4. The problem with the target material
Whether the titanium target is poisoned, check and replace it.
5. Whether the vacuum chamber is leaking
Perform a leak detection.
6. Product surface oxidation
There are many reasons for oxidation, so you can judge and deal with it yourself.