Shock-resistive printed circuit board and electronic device including the same
US6274821A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 15, 1999 |
| Grant date | Aug 14, 2001 |
| Priority date | — |
| Expiry date | Sep 15, 2019 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S428/901
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A printed circuit board has a layer including a resin material, which has a tensile breaking strain of approximately 1% or more at a tensile strain rate of 40%/sec at 25.degree. C., and an Izod impact strength of approximately 1 kgf.multidot.cm/cm or more at 25.degree. C. Otherwise, the resin material has a peak value of dynamic loss tangent of 0.05 or more in a range of -100.degree. C. to -50.degree. C. by .beta. relaxation, and a peak value of dynamic loss tangent of 0.02 or more in a range of 0.degree. C. to 100.degree. C. by .beta.' relaxation in a dynamic viscoelasticity spectral measurement. Accordingly, thermal shock resistance and drop shock resistance of the printed circuit board can be improved.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.