Combined material layering technologies for electric heaters
US8680443B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 6, 2004 |
| Grant date | Mar 25, 2014 |
| Priority date | — |
| Expiry date | Oct 10, 2029 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH05B3/28
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A layered heater is provided with a dielectric layer formed by a first layered process, a resistive layer formed on the dielectric layer, the resistive layer formed by a second layered process, and a protective layer formed on the resistive layer, wherein the protective layer is formed by one of the first or second layered processes or yet another layered process. The first layered process is different than the second layered process in order to take advantage of the unique processing benefits of each of the first and second layered processes for a synergistic result. The layered processes include, by way of example, thick film, thin film, thermal spraying, and sol-gel. Additional functional layers are also provided by the present invention, along with methods of forming each of the individual layers.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.