Process for fabricating a positive-temperature-coefficient heating device
US5077889A · kind A · utility
20Cited by
8References
5Claims
0Family size
Assignees
Inventors
Key dates
| Filing date | Dec 14, 1990 |
| Grant date | Jan 7, 1992 |
| Priority date | — |
| Expiry date | Dec 14, 2010 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T29/49085
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A process for fabricating a PTC thermistor device. A pair of opposing electrodes are formed on either major surface of a ceramic plate PTC thermistor element. Metallic plate heat radiation fins are secured to the opposing electrodes by brazing in a non-oxidizing environment. The PTC thermistor element is then heat treated in an oxidizing environment. Optionally, the opposing electrodes may include shield layers for preventing emission of gas from the PTC thermistor element during brazing.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.