DOI QR코드

DOI QR Code

Dielectric and Electric Properties of Mutilayer Ceramic Capacitor with SL Temperature Characteristics

SL 온도특성을 가지는 적층 칩 세라믹 캐패시터용 유전체의 유전 및 전기적 특성

  • 윤중락 (삼화콘덴서공업(주) 연구소) ;
  • 이상원 (삼화콘덴서공업(주) 연구소) ;
  • 김민기 (삼화콘덴서공업(주) 연구소) ;
  • 이경민 (삼화콘덴서공업(주) 연구소)
  • Published : 2008.07.01

Abstract

To reduce noise in high frequency and distortion of signal, the composition of $(Ca_{0.7}Sr_{0.3})(Zr_{0.97}Ti_{0.03})O_3$ and $(Ba_{0.2}Ca_{0.4}Sr_{0.4})TiO_3$ was developed. The composition was not solid solution, but mixtures of various phases composed of Ca, Sr, Zr, Ti and Ba oxides. The dielectric constant increased, the quality factor and the insulation resistance decreased with $(Ba_{0.2}Ca_{0.4}Sr_{0.4})TiO_3$ content. The composition of $0.4(Ba_{0.2}Ca_{0.4}Sr_{0.4})TiO_3$ satisfied the electric characteristics and the temperature coefficient of dielectric constant (TCC). In addition, the glass frit and $MnO_2$ also affected the electric characteristics. From the result of the best fit simulation, $MnO_2$ 0.3 mol%, the glass frit 0.6 wt% showed the insulation resistance $906{\Omega}{\cdot}F$, the quality factor 821, and the dielectric constant 92. With the selected composition, MLCC capacitors sized $4.5{\times}3.2{\times}2.5mm$ were manufactured with 105 layered of the dielectric thickness $16{\mu}m$ using Ni inner electrode, They represented the capacitance $98{\sim}102$ nF, the quality factor 1,200 and the insulation resistance $1,500{\Omega}{\cdot}F$. Also, they had high break-down voltage with $107{\sim}115V/{\mu}m$, and satisfied the SL TCC characteristics.

References

  1. H. Kishi, Y. Mizuno, and H. Chazono, 'Base- metal electrod-multilayer ceramic capacitors: Past, present and future perspectives', Jpn. J. Appl. Phys., Vol. 42, No. 1, p. 1, 2003 https://doi.org/10.1143/JJAP.42.1
  2. N. Inoue, K. Kawasaki, H. Sano, and T. Morimoto, 'Relationship between dielectric properties and microphonics of mulutilayer ceramic capacitors', Japanese Journal of Applied Physics, Vol. 45, No. 9B, p. 7365, 2006 https://doi.org/10.1143/JJAP.45.7365
  3. M. Laps, R. Grace, and B. Slola, 'Capacitors for Reduced Microphones and Sound Emission', 2007, Electronic Components, Assembiles & Materials Association(ECA), Arlington, Va, CARTS 2007 Symposium Proceedings, 2007
  4. Yoon J. R., Lee S. W., and Lee H. Y., 'Effect of the dielectric properties for (Ca,Sr)(ZrTi)O3 MLCC with Ni electrode', International Conference on Electrical Engineering 2002, Proceedings : Vol. III, p. 1109, 2002
  5. 윤중락, 정태석, 최근묵, 이석원, '반응표면분석법에 의한 적층 칩 배리스터의 전기적 특성', 전기전자재료학회논문지, 20권, 6호, p. 496, 2007 https://doi.org/10.4313/JKEM.2007.20.6.496
  6. 윤중락, 이석원, 이헌용, 'Glass frit 및 $TiO_2$ 첨가에 따른 LTCC용 마이크로파 유전체의 유전 특성', 전기전자재료학회논문지, 17권, 9호, p. 942, 2004
  7. Electronic Industries Association, Specification, #RS198
  8. 문환, 김민기, 전현표, 안재평, 윤중락, 정태석, '첨가물의 형태가 MLCC X7R 조성의 유전 특성 및 미세구조에 미치는 영향', 한국세라믹학회, 40권, 7호, p. 644, 2003