Key sheet and production method thereof
US7781690B2 · kind B2 · utility
65Cited by
10References
7Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Oct 24, 2006 |
| Grant date | Aug 24, 2010 |
| Priority date | — |
| Expiry date | Sep 1, 2027 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T29/49105
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
Portable phones are getting a trend that s design and thinner configuration becomes more important. Therefore, in order to meet this demand, the entire key top is made of a thin metal, and a thin resin layer is provided on the back surface of the key top and further letter holes are filled with a resin. According to those, the adhesiveness of the key top is improved as well as improvement of hand feeling. In addition, a printed layer for coloring the letters can be provided on the back surface of the key top.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.