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US 4,309,507 AGranted
Glass and hermetic seal
AssigneeMotorola, Inc.
InventorsEarl K. Davis, Robert W. Hey
Life of this patent
Estimating the term…
Abstract
An improved sealing glass composition for making compression glass electrical feedthroughs in semiconductor device packages is described wherein the improved sealing glass consists essentially of (by weight percent) 63-68% SiO.sub.2, 3-6% Al.sub.2 O.sub.3, 8-9% K.sub.2 O, 5-6% Na.sub.2 O, 0.5-1.5% Li.sub.2 O, 2-4% BaO, 5-7% SrO, 2-4% CaO, 0.5-1.5% MgO, 0.5-1.5% TiO.sub.2, and 0.5-1.5% B.sub.2 O.sub.3.
Claims2
A sealing glass consisting essentially of percentages of ingredients, by weight, in the range of:
- ______________________________________ SiO.sub.2 63-68 Al.sub.2 O.sub.3 3-6 K.sub.2 O 8-9 Na.sub.2 O 5-6 Li.sub.2 O 0.5-1.5 BaO 2-4 SrO 5-7 CaO 2-4 MgO 0.5-1.5 TiO.sub.2 0.5-1.5 B.sub.2 O.sub.3 0.5-1.5. ______________________________________
Dependencies are inferred from the claim text.