Glass frit for dielectrics, dielectric ceramic composition, multilayer ceramic capacitor, and method for manufacturing the same
US7079374B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 30, 2005 |
| Grant date | Jul 18, 2006 |
| Priority date | — |
| Expiry date | Jun 30, 2025 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC04B2235/365
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A glass frit for dielectrics, a dielectric ceramic composition, a multilayer ceramic capacitor, and a method for manufacturing the same are disclosed. The glass frit has a composition represented by the formula aSiO2-bB2O3-cLi2O-dK2O-eCaO-fAl2O3-gTiO2-hZrO2, wherein the ratio of components satisfies the conditions of 20≦a≦35, 20≦b≦35, 20≦c≦30, 3≦d≦5, 2≦e≦12, 2≦f≦10, 1≦g≦12 and 1≦h≦7 in terms of mol % where a+b+c+d+e+f+g+h=100. The dielectric ceramic composition comprises 100 parts by weight of (Ca1-xRx)(Zr1-yTiy)O3, 0.5˜2.5 parts by weight of the glass frit, and 1.0˜5.0 parts by weight of a Mn compound. Additionally, the multilayer ceramic capacitor, and the method for manufacturing the same also use the glass frit having the above composition. The ratio of tetracoordinate boron to tricoordinate boron is increased in a lithium borosilicate glass, thereby enhancing structural property, and the components of Al2O3, TiO2 and ZrO2, enhance acid resistance.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.