Lead free glass(es), thick film paste(s), tape composition(s) and low temperature cofired ceramic devices made therefrom

US7687417B2 · kind B2 · utility

Assignee

• E.I. DU PONT DE NEMOURS AND COMPANY · US

Inventors

• Kenneth Warren Hang · Hillsborough, US
• Kumaran Manikantan Nair · East Amherst, US
• Mark Frederick McCombs · Clayton, US

Key dates

• Filing date: Oct 5, 2006
• Grant date: Mar 30, 2010
• Expiry date: Oct 12, 2027

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T428/24926
• WIPO field: Materials, metallurgy
• WIPO sector: Chemistry

Abstract

A glass composition consisting essentially of, based on mole percent, 46-56% B2O3, 0.5-8.5% P2O5, SiO2 and mixtures thereof, 20-50% CaO, 2-15% Ln2O3 where Ln is selected from the group consisting of rare earth elements and mixtures thereof; 0-6% M′2O where M′ is selected from the group consisting of alkali elements; and 0-10% Al2O3, with the proviso that the composition is water millable.