Compositions: ceramic – Ceramic compositions – Titanate – zirconate – stannate – niobate – or tantalate or...
Reexamination Certificate
2005-01-25
2005-01-25
Group, Karl (Department: 1755)
Compositions: ceramic
Ceramic compositions
Titanate, zirconate, stannate, niobate, or tantalate or...
Reexamination Certificate
active
06846767
ABSTRACT:
A dielectric ceramic composition of high dielectric constant and low dielectric loss, which can be co-fired with Ag electrodes, is provided for use in various parts of electric and electronic appliances. Based on a base composition with a high dielectric constant, the composition comprises glass frit and optionally CuO, as represented by the following formula:in-line-formulae description="In-line Formulae" end="lead"?awt. % {xCaO-y1Sm2O3-y2Nd2O3-wLi2O-zTiO2}+bwt. % (ZnO—B2O3—SiO2based or Li2O—B2O3—SiO2based glass frit)+cwt. % CuOin-line-formulae description="In-line Formulae" end="tail"?wherein, 13.0 mol %≦x≦20.0 mol %; 10.0 mol %≦y1+y2≦17.0 mol %; 6.0 mol %≦w≦11.0 mol %; 60.0 mol %≦z≦67.0 mol % with the proviso that x+y1+y2+w+z=100; 85.0 wt. %≦a≦97.0 wt. %; 3.0 wt. %≦b≦15.0 wt. %; and c≦7.0 wt. %.
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“Dielectric Properties of Ca1-xSM2x/3TiO3Li1/2Ln1/2TiO3Ceramics”, by Ki Hyun Yoon et al, Jap. J. Appl. Phys.Vol 35 (1996) pp. 5145-5149, Park 1, No. 9B, Sep. 1996.
Hur Kang Heon
Kim Jong Han
Kim Joon Hee
Kim Woo Sup
Group Karl
Lowe Hauptman & Gilman & Berner LLP
Samsung Electr-Mechanics Co., Ltd.
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