| Patent Number |
Title Of Patent |
Date Issued |
| 6589893 |
Glass-ceramics having hexacelsian as a primary crystal phase, magnetic disk substrate and magnet |
July 8, 2003 |
| A glass-ceramic has a hexacelsian as a primary crystal phase and is characterized by satisfying a relation of 0.ltoreq.I(101)/I(110).ltoreq.1.5 when a diffraction intensity of (101) face of hexacelsian in an X-ray diffraction is I(101) and a diffraction intensity of (110) face thereo |
| 6556419 |
Electronic component and method for producing same |
April 29, 2003 |
| Ag powder particles each having a surface coated with alumina form a material. A conductor paste is prepared from the material. The conductor paste is printed on a dielectric layer by means of screen printing, for example. Accordingly, an electrode pattern of the conductor paste is f |
| 6372319 |
Nucleating agents for crystallized glasses, crystallized glasses, magnetic discs substrate and m |
April 16, 2002 |
| A nucleating agent for producing a crystallized glass, which nucleating agent is to make fine particles at least in the cristobalite phase when added into the crystallized glass containing at least the cristobalite phase, and includes one or more kinds of metallic compounds selected from |
| 6284340 |
Crystallized glass, magnetic disc substrate and magnetic disc |
September 4, 2001 |
| A crystallized glass has a main crystal phase of petalite (Li.sub.2 O.Al.sub.2 O.sub.3.8SiO.sub.2) phase and lithium disilicate (Li.sub.2 O.2SiO.sub.2) phase and an auxiliary crystal phase of .alpha.-quartz phase. In the crystallized glass, a crystal phase composition measured by Rie |
| 6270876 |
Crystallized glass, substrate for magnetic disc, magnetic disc and method of producing crystalli |
August 7, 2001 |
| A crystallized glass has a main crystal phase of .alpha.-quartz (SiO.sub.2) and lithium disilicate (Li.sub.2.multidot.2SiO.sub.2) and has a thermal expansion coefficient of (90.about.130).times.10.sup.-7 /K at -50.degree. C..about.70.degree. C. The crystallized glass mentioned above, has |
| 6086977 |
Substrates for magnetic discs, magnetic discs and process for producing magnetic discs |
July 11, 2000 |
| A magnetic disc substrate is provided, which includes a magnetic disc substrate body made of glass and is characterized in that a metal element capable of absorbing light is present in at least a surface portion of the magnetic disc substrate body, and a texture is formed on a surface of |
| 6048589 |
Substrates for magnetic discs, magnetic discs and process for producing magnetic discs |
April 11, 2000 |
| A magnetic disc substrate is provided, which includes a magnetic disc substrate body made of glass and is characterized in that a metal element capable of absorbing light in at least a surface portion of the magnetic disc substrate body, and a texture is formed on a surface of the magnet |
| 5872069 |
Glass-ceramics for magnetic disc substrate, magnetic disc substrate and magnetic disc |
February 16, 1999 |
| A novel Li.sub.2 O--Al.sub.2 O.sub.3 --SiO.sub.2 series glass-ceramics for magnetic disc substrate use, which can prevent deformation of the substrate at a large temperature change and provide a strong, small and compact magnetic disc substrate without trouble and much reading and/or |
| 5493262 |
Dielectric ceramic composition containing ZnO-B.sub.2 O.sub.3 -SiO.sub.2 glass, method of prepar |
February 20, 1996 |
| A dielectric ceramic composition is disclosed which consists essentially of: a main ceramic composition containing barium oxide, titanium oxide, rare earth oxide and bismuth oxide as major components, which composition is represented by xBaO.yTiO.sub.2.z[(1-a)RE.sub.2 O.sub.3.aBi.sub.2 |
| 5488019 |
Dielectric ceramic composition containing ZnO-B.sub.2 O.sub.3 -SiO.sub.2 glass, method of prepar |
January 30, 1996 |
| A dielectric ceramic composition is disclosed which consists essentially of: a main ceramic composition containing barium oxide, titanium oxide, rare earth oxide and bismuth oxide as major components, which composition is represented by xBaO.yTiO.sub.2.z[(1-a)RE.sub.2 O.sub.3.aBi.sub.2 |
| 5485132 |
Dielectric ceramic composition containing ZnO-B.sub.2 O.sub.3 -SiO.sub.2 glass, method of prepar |
January 16, 1996 |
| A dielectric ceramic composition is disclosed which consists essentially of: 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 |
| 5479140 |
Dielectric ceramic composition containing ZnO-B.sub.2 O.sub.3 -SiO.sub.2 glass, method of prepar |
December 26, 1995 |
| A dielectric ceramic composition is disclosed which consists essentially of: 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 |
| 5458981 |
Method of producing low temperature firing dielectric ceramic composition containing B.sub.2 O.s |
October 17, 1995 |
| A method of producing a dielectric ceramic composition is disclosed which includes the steps of: preparing a main ceramic composition comprising BaO, TiO.sub.2 and RE.sub.2 O.sub.3 (where RE represents at least one rare earth metal) as major components; calcining a mixture of starting |
| 5378663 |
Method of preparing a dielectric ceramic composition for producing a dielectric resonator or fil |
January 3, 1995 |
| A dielectric ceramic composition is disclosed which includes: a main ceramic composition of barium oxide and titanium oxide, or barium oxide, titanium oxide and at least one of strontium oxide, calcium oxide, zirconia and zinc oxide, which composition is represented by (1-a-b)BaO.mul |
| 5350721 |
Dielectric ceramic composition containing ZNO-B203-SI02 glass, method of preparing the same, and |
September 27, 1994 |
| A dielectric ceramic composition is disclosed which consists essentially of: a main ceramic composition containing barium oxide, titanium oxide, rare earth oxide and bismuth oxide as major components, which composition is represented by xBaO.yTiO.sub.2.z[(1-a)RE.sub.2 O.sub.3.aBi.sub.2 |
| 5332984 |
Dielectric resonator or filter for microwave application, and method of producing the dielectric |
July 26, 1994 |
| A dielectric ceramic composition is disclosed which includes: a main ceramic composition of barium oxide and titanium oxide, or barium oxide, titanium oxide and at least one of strontium oxide, calcium oxide, zirconia and zinc oxide, which composition is represented by (1-a-b)BaO.aSr |
| 5304521 |
Dielectric ceramic composition containing ZnO-B.sub.2 O.sub.3 -SiO.sub.2 glass, method of prepar |
April 19, 1994 |
| A dielectric ceramic composition is disclosed which consists essentially of: a main ceramic composition containing barium oxide, titanium oxide, rare earth oxide and bismuth oxide as major components, which composition is represented by xBaO.yTiO.sub.2.z[(1-a)RE.sub.2 O.sub.3.aBi.sub.2 |
| 5292694 |
Method of producing low temperature firing dielectric ceramic composition containing B.sub.2 O.s |
March 8, 1994 |
| A method of producing a dielectric ceramic composition is disclosed which includes the steps of: preparing a main ceramic composition comprising BaO, TiO, and RE.sub.2 O.sub.3 (where RE represents at least one rare earth metal) as major components; calcining a mixture of starting mat |
| 5290740 |
Dielectric ceramic composition used for producing dielectric resonator or filter for microwave a |
March 1, 1994 |
| A dielectric ceramic composition is disclosed which includes: a main ceramic composition of barium oxide and titanium oxide, or barium oxide, titanium oxide and at least one of strontium oxide, calcium oxide, zirconia and zinc oxide, which composition is represented by (1-a-b)BaO.aSr |
| 5264403 |
Dielectric ceramic composition containing ZnO-B.sub.2 O.sub.3 -SiO.sub.2 glass |
November 23, 1993 |
| A dielectric ceramic composition is disclosed which consists essentially of: 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 |
| 5185304 |
Dielectric ceramic composition of BaO, TiO.sub.2, Nd.sub.2 O.sub.3, Sm.sub.2 O.sub.3 and Bi.sub. |
February 9, 1993 |
| A dielectric ceramic composition is disclosed which consists principally of barium oxide, titanium oxide, neodymium oxide, samarium oxide and bismuth oxide, which are represented by the following formula xBaO--yTiO.sub.2 --z[(1-a-b)Nd.sub.2 O.sub.3 --aSm.sub.2 O.sub.3 --bBi.sub.2 O.sub.3 |
