Slide bead coating with a low viscosity carrier layer
US6579569B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 28, 2001 |
| Grant date | Jun 17, 2003 |
| Priority date | — |
| Expiry date | Feb 28, 2021 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03C2001/7492
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
An improved method of thin film coating is taught that uses a multi-slot coating apparatus to apply multiple liquid layers to a moving substrate. The lowermost layer contacting the substrate is comprised of an organic solvent. The lowermost layer may be a single organic solvent or a blend of several organic solvents. Whether comprised of a single organic solvent or a blend of organic solvents, the viscosity of the lowermost layer is less than 1 cp and the wet thickness of the lowermost layer is not more than about 5 &mgr;m. Additional liquid layers are applied to the moving substrate on the top of the lowermost layer. This method allows for application of coatings at high substrate speeds. This method also allows for the reduction of coating artifacts caused by contamination of the surface of the die.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.