High K glass and tape composition for use at high frequency

Details High K glass and tape composition for use at high frequency High K glass and tape composition for use at high frequency

2005-01-11

2005-01-11

Group, Karl (Department: 1755)

Compositions: ceramic

Ceramic compositions

Glass compositions, compositions containing glass other than...

C501S046000, C501S047000, C501S051000, C428S434000

Reexamination Certificate

active

06841493

ABSTRACT:
The present invention is directed to a glass composition comprising, based on mole %, 15-35% MO where M is selected from BaO, CaO, MgO, PbO, SrO and mixtures thereof, 30-60% TiO2, 10-30% B2O3, 1-7% P2O5, 0-3% Li2O and 2-16% Ln2O3where Ln is selected from the group of rare earth elements and mixtures thereof. The invention is further directed to the glass composition incorporated in a thick film composition or a castable dielectric composition comprising a dispersion of finely divided solids comprising, based on solids: (a) 30-100 wt. % the glass composition; (b) 0-50 wt. % ceramic filler; both dispersed in a solution of (c) an organic polymeric binder; and (d) a volatile organic solvent. The invention is still further directed to the castable dielectric composition used in a method of forming a high K green tape by casting a thin layer of the castable dispersion onto a flexible sheet and heating the cast layer to remove the volatile organic solvent.

REFERENCES:
patent: 6147019 (2000-11-01), Donohue
patent: 6217821 (2001-04-01), Donohue
patent: 6776861 (2004-08-01), Wang et al.
patent: 0 577 067 (2000-02-01), None
patent: 10-120435 (1998-05-01), None
patent: WO 0218285 (2002-03-01), None
O. Dernovsek, A. Naeini, G. Preu, W. Wersing, M. Eberstein, W. A. Schiller, LTCC glass-ceramic composites for microwave application, Journal of the European Ceramic Society 21 (2001) 1693-1697.

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