Surface treatment method and apparatus thereof
US4919073A · kind A · utility
16Cited by
13References
5Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 28, 1989 |
| Grant date | Apr 24, 1990 |
| Priority date | — |
| Expiry date | Feb 28, 2009 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/469
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
Treatment baths for surface treatment of semiconductor wafers by dipping thereof into a treatment liquid are arranged in a treatment bath train. One or more selected treatment baths among these treatment baths are constructed to have a plurality of unit treatment vessels. The treatment liquid in these treatment vessels is replaced successively one by one of the unit treatment vessels. The semiconductor wafers are dipped in the treatment liquid contained in that unit treatment vessel that is not being subjected at that moment to the replacement of the treatment liquid.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.