Dielectric ceramics and electronic parts using the same

Details Dielectric ceramics and electronic parts using the same Dielectric ceramics and electronic parts using the same

1995-08-28

1997-05-20

Marcantoni, Paul

Electrical resistors

With base extending along resistance element

Resistance element coated on base

338322, 29621, 501134, 501135, 501136, 501137, H01C 114

Patent

active

056316240

ABSTRACT:
A dielectric ceramics contains, at least, two kinds of metal ions and a dielectric constant changes continuously or step by step as a function of position. The metal ions contained in the dielectric ceramics are, at least, two kinds which are selected from Mg, Ca, Sr, Ba, Zn, Pb, Bi, Y, La, Ce, Nd, Sm, Gd, Er, Ti, Zr, Sn, Si and Mn, and the dielectric constant .epsilon. changes in the range of 7.ltoreq..epsilon..ltoreq.90. This dielectric ceramics is used in a dielectric substrate for stripline device, a dielectric substrate for monolithic IC and a dielectric block for polarizer. For example, when used as the dielectric substrate for stripline device, it is so formed that a dielectric constant at its center portion is constant, and that those at an outer portion becomes smaller step by step or continuously towards ends. In the case of forming a stripline on the dielectric substrate, when characteristic impedance is constant, a line width at a center portion of the dielectric substrate is narrow and it becomes wider towards ends.

REFERENCES:
patent: 2063357 (1936-12-01), Williams
patent: 2648804 (1953-08-01), Steigerwalt et al.
patent: 4215333 (1980-07-01), Huang
patent: 4759965 (1988-07-01), Kato et al.
patent: 4952538 (1990-08-01), Kumagai et al.
patent: 5335139 (1994-08-01), Nomura et al.
Introduction to Ceramics Kingery et al. (1976) John Wiley & Sons pp. 968-969.

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