Claims
- 1. A dielectric resonator comprising:
- a dielectric ceramic obtained by firing a dielectric ceramic composition which consists essentially of (i) a main ceramic composition containing barium oxide, titanium oxide, rare earth oxide and bismuth oxide as major components, which composition is represented by xBaO.multidot.yTiO.sub.2 .multidot.z((1-a)RE.sub.2 O.sub.3 .multidot.aBi.sub.2 O.sub.3), wherein RE represents at least one rare earth metal, 0.10.ltoreq.x.ltoreq.0.20, 0.60.ltoreq.y.ltoreq.0.75, 0.10.ltoreq.z.ltoreq.0.25, x+y+z=1 and 0<a.ltoreq.0.3, and (ii) a glass composition comprised of ZnO, B.sub.2 O.sub.3 and SiO.sub.2, which is represented by k(wt. %) ZnO.multidot.m(wt. %)B.sub.2 O.sub.3 .multidot.n(wt. %)SiO.sub.2 where 30.ltoreq.k.ltoreq.85, 5.ltoreq.m.ltoreq.50, 2.ltoreq.n.ltoreq.40, k+m+n=100, said glass composition being contained in an amount of at least 0.1 parts by weight, but not more than (18-62.5a) parts by weight (where0<a.ltoreq.0.2) or not more than 5.5 parts by weight. (where 0.2<a.ltoreq.0.3), per 100 parts by weight of said main ceramic composition; and
- a conductor layer which is co-fired with said dielectric ceramic so that said conductor layer pattern is embedded in said dielectric ceramic.
- 2. A dielectric resonator comprising:
- a dielectric ceramic obtained by firing a dielectric ceramic composition which consists essentially of (i) a main ceramic composition containing barium oxide, titanium oxide and rare earth oxide as major components, which composition is represented by xBaO.multidot.yTiO.sub.2 .multidot.zRE.sub.2 O.sub.3, wherein RE represents at least one rare earth metal, 0.10.ltoreq.x.ltoreq.0.20, 0.60.ltoreq.y.ltoreq.0.75, 0.10.ltoreq.z.ltoreq.0.25, and x+y+z=1, and (ii) a glass composition comprised of ZnO, B.sub.2 O.sub.3 and SiO.sub.2, which is represented by k(wt. %)ZnO.multidot.m(wt. %)B.sub.2 O.sub.3 .multidot.n(wt. %)SiO.sub.2 where 30.ltoreq.k.ltoreq.85, 5.ltoreq.m.ltoreq. 5.0, 2.ltoreq.n.ltoreq.40, k+m+n=10.0, said glass composition being contained in an amount of 0.1.about.18 parts by weight per 100 parts by weight of said main ceramic composition; and
- a conductor layer which is co-fired with said dielectric ceramic so that said conductor layer is embedded in said dielectric ceramic.
- 3. A dielectric resonator comprising:
- a dielectric ceramic obtained by firing a dielectric ceramic composition which consists essentially of (i) a main ceramic composition containing barium oxide, strontium oxide, calcium oxide, titanium oxide, rare earth oxide and bismuth oxide as major components, which composition is represented by x((1-c-d)BaO.multidot.cSrO.multidot.dCaO).multidot.yTiO.sub.2 .multidot.z((1-e) RE.sub.2 O.sub.3 .multidot.eBi.sub.2 O.sub.3), wherein RE represents at least one rare earth metal, 0.10.ltoreq.x<0.20, 0.60.ltoreq.y.ltoreq.0.75, 0.10.ltoreq.z.ltoreq.0.25, x+y+z=1, 0.ltoreq.c.ltoreq.0.40, 0.ltoreq.d.ltoreq.0.20, 0.ltoreq.e.ltoreq.0.30 and 0<c+d, and (ii) a glass composition comprised of ZnO, B.sub.2 O.sub.3 and SiO.sub.2, which is represented by k(wt. %)ZnO.multidot.m(wt. %)B.sub.2 O.sub.3 .multidot.n(wt. %)SiO.sub.2 where 30.ltoreq.k.ltoreq.85, 5 .ltoreq.m.ltoreq.50, 2.ltoreq.n.ltoreq.40, k+m+n=100, said glass composition being contained in an amount of at least 0.1 parts by weight, but not more than (18.about.62.5e) parts by weight (where 0<e.ltoreq.0.2) or not more than 5.5 parts by weight (where 0.2<e.ltoreq.0.3), per 100 parts by weight of said main ceramic composition; and
- a conductor layer which is co-fired with said dielectric ceramic so that said conductor layer is embedded in said dielectric ceramic.
Priority Claims (7)
Number |
Date |
Country |
Kind |
3-276587 |
Sep 1991 |
JPX |
|
4-92180 |
Mar 1992 |
JPX |
|
4-92182 |
Mar 1992 |
JPX |
|
4-98862 |
Mar 1992 |
JPX |
|
4-276594 |
Sep 1992 |
JPX |
|
4-276595 |
Sep 1992 |
JPX |
|
4-276596 |
Sep 1992 |
JPX |
|
Parent Case Info
This is a division of application Ser. No. 08/251,567 filed May 31, 1994, now pending, which in turn is a division of application Ser. No. 08/181,423 filed Jan. 14, 1994, which has issued as U.S. Pat. No. 5,350,721 and in turn is a division of application Ser. No. 08/102,059 filed Aug. 4, 1993, which has issued as U.S. Pat. No. 5,304,521 and in turn is a division of application Ser. No. 07/948,585 filed Sep. 23, 1992 which has issued as U.S. Pat. No. 5,264,403.
US Referenced Citations (8)
Foreign Referenced Citations (1)
Number |
Date |
Country |
0222303 |
May 1987 |
EPX |
Divisions (4)
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Number |
Date |
Country |
Parent |
251567 |
May 1994 |
|
Parent |
181423 |
Jan 1994 |
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Parent |
102059 |
Aug 1993 |
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Parent |
948585 |
Sep 1992 |
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