Glass-ceramic materials and electronic packages including same

Details Glass-ceramic materials and electronic packages including same Glass-ceramic materials and electronic packages including same

2007-03-06

2007-03-06

McNeil, Jennifer C. (Department: 1775)

Stock material or miscellaneous articles

Composite

Of quartz or glass

C501S004000

Reexamination Certificate

active

11084718

ABSTRACT:
A glass-ceramic is provided having a thermal expansion coefficient in a range of 4.0 to 8.5 ppm/° C., a dielectric constant in a range of 5–7 and a Quality factor Q of at least 400. The glass-ceramic consists essentially of SiO2in a range of 40–55 wt %, Al2O3in a range of 7–22 wt %, MgO in a range of 6 to less than 26 wt %, and at least one of BaO in an amount up to 35 wt %, SrO in an amount up to 37 wt % and ZnO in an amount up to 17 wt %. An electronic package is also provided, including one of a metal and sintered ceramic base member and a glass-ceramic substrate bonded to the base member.

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U.S. Appl. No. 11/084,722, filed Mar. 18, 2005, Rita.

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