Method for making high refractive index (HRI) film by adjusting the flow rate of a vaporized material
US6194031A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 21, 1999 |
| Grant date | Feb 27, 2001 |
| Priority date | — |
| Expiry date | Apr 21, 2019 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC23C14/562
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
This invention includes a method for heating a deposition material to form a vapor that may be deposited on a polymer film and thereby create a holographic film or similar material. Included within this method is a vaporizer that has an adjustable aperture. The vaporizer may have (i) a flexible wall that defines a cavity in which a deposition material is heated (ii) a first lip extending outward from a first side of the flexible wall and (iii) a second lip extending outward from a second side of the flexible wall. The aperture size can be adjusted to a desired cross-sectional opening by adjusting the distance of separation between the first lip and the second lip. By adjusting the size of the aperture, the flow rate of the vapor from the vaporizer can be adjusted to achieve a desired flow rate. Heat from a heat source in thermal communication with the vaporizer may be employed to heat the deposition material to form a vapor. The vaporizer may be disposed within a vacuum chamber, which has a feed roll and a take up roll. Film may be transferred from the feed roll to the take up roll so that, the vapor is deposited on the film.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.