Composite sheet material selection method for use in ultra-fast laser patterning
US7773216B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 10, 2005 |
| Grant date | Aug 10, 2010 |
| Priority date | — |
| Expiry date | Dec 1, 2027 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB32B2310/0843
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
The present invention is a method of selecting composite sheet materials for use in ultra-fast laser patterning of layers of organic thin film material such as OLEDs. The material is selected to accomplish patterning of upper layers without damaging underlying layers by using an ultra-fast laser programmed with the appropriate laser processing parameters. These parameters are derived by examining each layer's absorption spectra, thermal, and chemical characteristics. The method of the present invention includes measuring each layer's absorption spectrum, examining each layer's thermal and chemical characteristics, determining if the layer is ablatable, determining the laser setup, patterning the layer through laser ablation processing, and determining if more layers need to be ablated. Further, the method includes a sub-method of selecting an alternate material if a layer's material characteristics are not favorable for ablation without damaging underlying layers.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.