Low-K And Mid-K LTCC Dielectric Compositions And Devices
AssigneeFerro Corporation
InventorWalter J. Symes, Jr.
Life of this patent
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Abstract
LTCC devices are produced from dielectric compositions comprising a mixture of precursor materials that, upon firing, forms a dielectric material comprising a barium-tungsten-silicon host.
Claims23
A composition comprising a mixture of precursor materials that, upon firing, forms a lead-free and cadmium-free dielectric material comprising a barium-tungsten-silicon oxide host material.
A host material comprising:
- (i) 30-50 wt % BaO,
- (ii) 45-65 wt % WO3,
- (iii) 1-10 wt % SiO2,
- (iv) no lead, and
- (v) no cadmium.
A lead-free and cadmium-free composition comprising a mixture of precursors that, upon firing, forms a lead-free and cadmium-free dielectric material comprising:
- (a) 10-55 wt % BaO,
- (b) 15-60 wt % WO3,
- (c) 0.5-15 wt % SiO2,
- (d) 0-27 wt % CaO,
- (e) 0-35 wt % TiO2,
- (f) 0-15 wt % SrO,
- (g) 0.05-5 wt % B2O3,
- (h) 0.05-5 wt % Li2O,
- (i) 0-5 wt % LiF,
- (j) 0-5 wt % CuO, and
- (k) 0-10 wt % ZnO.
8-10. (canceled)
16-18. (canceled)
A host material comprising:
- (a) 30-45 wt % BaO,
- (b) 50-60 wt % WO3,
- (c) 1-10 wt % SiO2,
- (d) no lead, and
- (e) no cadmium.
A lead-free and cadmium-free dielectric composition comprising:
- (a) 20-70 wt % BaO,
- (b) 20-70 wt % WO3,
- (c) 0.1-10 wt % SiO2,
- (d) 0-10 wt % CaO,
- (e) 0-10 wt % TiO2,
- (f) 0.10-5 wt % B2O3,
- (g) 0.1-5 wt % Li2O3, and
- (h) 0.1-5 wt % LiF.
24-26. (canceled)
(canceled)
Dependencies are inferred from the claim text.