Compositions: ceramic – Ceramic compositions – Glass compositions – compositions containing glass other than...
Reexamination Certificate
2008-04-01
2008-04-01
Group, Karl E (Department: 1755)
Compositions: ceramic
Ceramic compositions
Glass compositions, compositions containing glass other than...
C501S005000, C501S134000, C501S136000, C501S137000, C501S122000, C428S210000, C428S432000, C428S701000, C428S702000
Reexamination Certificate
active
07351674
ABSTRACT:
An insulating ceramic composition forming insulating ceramic layers (3) stacked in a multilayer ceramic substrate (2) used in a monolithic ceramic electronic component, such as a multilayer ceramic module (1). The insulating ceramic composition contains a first ceramic powder mainly containing forsterite, a second ceramic powder mainly containing at least one compound selected from the group consisting of CaTiO3, SrTiO3, and TiO2, and a borosilicate glass powder. The borosilicate glass powder contains 3 to 15 percent by weight of lithium in terms of Li2O, 30 to 50 percent by weight of magnesium in terms of MgO, 15 to 30 percent by weight of boron in terms of B2O3, 10 to 35 percent by weight of silicon in terms of SiO2, 6 to 20 percent by weight of zinc in terms of ZnO, and 0 to 15 percent by weight of aluminum in terms of Al2O3. The insulating ceramic composition can be fired at a temperature of 1000° C. or less, and the resulting sintered compact has a low relative dielectric constant, a resonance frequency with a low temperature coefficient, and a high Q value.
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Written Opinion of the International Searching Authority dated May 31, 2005.
Mori Naoya
Moriya Yoichi
Sugimoto Yasutaka
Urakawa Jun
Dickstein , Shapiro, LLP.
Group Karl E
Murata Manufacturing Co. Ltd.
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