Patent · US Active

Low dielectric glass fiber

US7678721B2 · kind B2 · utility

1Cited by

9References

36Claims

0Family size

Assignee

AGY HOLDING CORPORATION · US

Inventors

Douglas S. Boessneck · Aiken, US
J. Ronald Gonterman · Cub Run, US
Oleg A. Prokhorenko · Saint Petersburg, RU

Key dates

Filing date	Oct 26, 2006
Grant date	Mar 16, 2010
Priority date	—
Expiry date	Jun 30, 2028

Classification

Technology area (CPC H)Electricity
CPC primaryH05K1/0366
WIPO fieldMaterials, metallurgy
WIPO sectorChemistry

Abstract

A glass fiber having a low dielectric constant and low dielectric loss tangent consists essentially of by weight, as a glass composition, 52 to 60% of SiO2, 11 to 16% of Al2O3, 20 to 30% of B2O3, and 4 to 8% of CaO, and substantially no MgO, substantially no Li2O, substantially no Na2O, substantially no K2O, and substantially no Ti2O. The glass fiber also may contain up to 2% F2 by weight. The glass fiber is ideal for use as reinforcement for printed wiring boards, and has excellent dielectric properties at frequencies of about 18 GHz or higher.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.