Dielectric ceramic composition and method for manufacturing multilayered components using the same
First Claim
1. A dielectric ceramic composition comprising, (A) at least one oxide selected from the group consisting of La2O3, Nd2O3, Al2O3 and Y2O3, and (B) at least one oxide selected from the group consisting of Nb2O5 and Ta2O5, at a molar ratio of 1:
- 1,wherein said composition is represented by the general formula;
2 Assignments
0 Petitions
Accused Products
Abstract
The present invention discloses dielectric ceramic compositions having dielectric properties suitable for high frequency bands, such as microwave and millimetric wave, and a method for manufacturing multilayered components, such as chip LC filters, chip duplexers, and dielectric filters for PCS, using the dielectric ceramic compositions. The dielectric ceramic composition not only possesses low dielectric loss, a high dielectric constant, and temperature stability, but are also capable of being sintered at low temperatures and simultaneously baked with metal electrodes, including silver, copper, silver/palladium. Therefore, the dielectric composition can be applied to temperature stable capacitors (NPO MLCC), microwave oscillators, substrates, filters, planar antenna and on the like. The dielectric composition are represented by the general formula:
where A′ and A″ are La, Nd, Y and Al; B′ and B″ are Nb and Ta.
-
Citations
17 Claims
-
1. A dielectric ceramic composition comprising, (A) at least one oxide selected from the group consisting of La2O3, Nd2O3, Al2O3 and Y2O3, and (B) at least one oxide selected from the group consisting of Nb2O5 and Ta2O5, at a molar ratio of 1:
- 1,
wherein said composition is represented by the general formula;
- View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
- 1,
-
13. A method for manufacturing multilayered components, comprising the steps of:
-
mixing a composition represented by the formula A′
xA″
1−
xB′
yB″
1−
yO4 with either one of a sintering aid and an additive, to form a slurry, said A′ and
said A″
being elements selected from the group consisting of La, Nd, Y and Al, said said B′ and
B″
being elements selected from the group consisting of Nb and Ta, and said x and said y being mole fractions, in the range of 0≦
x≦
1.0, and 0≦
y≦
1.0, respectively;
deaerating said slurry, followed by molding said slurry into a tape form;
printing an inner electrode on said molded tape form by use of a low melting point electrode paste with a melting point of about 1,000°
C. or lower;
laminating said inner electrode-printed tape to at least two layers; and
sintering said laminated tape in a sintering furnace at about 1000°
C. or lower.- View Dependent Claims (14, 15, 16, 17)
-
Specification