Patent Number: 6,309,993

Title: Low-fire microwave dielectric compositions

Abstract: The present invention relates to a dielectric composition which can be densified at a temperature no higher than 1000.degree. C. and can provide ceramic products with a dielectric constant of 20 to 45 and a quality constant of 1000 to 1300 at 7 GHz. The dielectric composition comprises 20-90 vol % borosilicate glass and 10-80 vol % TiO.sub.2 ceramic. Multilayered microwave dielectric ceramic elements can be prepared by mixing the composition of the present invention with an organic solvent, a polymer binder and a plasticizer, forming a green sheet from the mixture by tape casting, screen-printing and laminating the green sheet, and then cofiring the multilayer ceramic laminate with a high electrical conductivity metal, such as Ag and Cu.

Inventors: Jean; Jau-Ho (Taipei, TW), Lin; Shih-Chun (Taipei, TW)

Assignee: National Science Council of Republic of China

International Classification: C03C 14/00 (20060101); C03C 3/076 (20060101); C03C 8/20 (20060101); C03C 8/00 (20060101); C03C 3/091 (20060101); C03C 003/091 ()

Expiration Date: 10/30/2018