Platinum heater for electrical smoking article having ohmic contact
US5573692A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 28, 1994 |
| Grant date | Nov 12, 1996 |
| Priority date | — |
| Expiry date | Sep 28, 2014 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA24F40/20
- WIPO fieldOther consumer goods
- WIPO sectorOther fields
Abstract
A thin film layer of primarily platinum is deposited onto a ceramic substrate and electrical connections are applied to the platinum layer to form a heater. In a preferred embodiment, the electrical connections comprise two electrically conductive posts fixed to the ceramic substrate at a first end and electrically contacting the platinum heater layer near this first end. Preferably, the heater layer forms mounds at each post and a thinner region therebetween, resulting in a resistance profile which concentrates heating in the thinner region and reduces undesired heating of the post area. Such heaters can be employed individually or in conjunction with other similar heaters.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.