Physical and dielectric properties of BaTiO3-fluoride-glass systems for nitrogen-fireable embedded capacitors

Byeong Kon Kim, Dong Joo Shin, Ik Jin Choi, Jong Won Lee, Jun Chul Kim, Nam Kee Kang, Jun Kwang Song, Yong Soo Cho

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)


BaTiO3-based dielectrics containing the selective additive combinations from Pb-free glasses and fluoride compounds such as AlF 3, BaF2, CaF2, LiF and ZnF2 were studied mainly for a potential N2-fireable embedded capacitor in printed circuit board with Cu metallization. The physical and dielectric properties, such as dielectric constant (k), loss tangent (tanδ) and T c, strongly depended on the choice of additive combination. A bismuth borosilicate glass was most promising in terms of the degree of densification and dielectric constant. The samples containing LiF and ZnF2 and sintered at 950 °C looked most beneficial in that these additives produced high k of >1,200 and low tanδ of < 0.022 at room temperature regardless of sintering atmosphere. As an example, the 95BaTiO 3-2LiF-3(Bi borosilicate) sample exhibited k∼1,340 and tanδ∼0.022 at room temperature when fired at 950 °C in N 2.

Original languageEnglish
Pages (from-to)277-283
Number of pages7
JournalJournal of Electroceramics
Issue number2-4
Publication statusPublished - 2009 Oct

Bibliographical note

Funding Information:
Acknowledgement We would like to express sincere acknowledgment for the financial support by Korea Electronics Technology Institute through a research project.

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Ceramics and Composites
  • Condensed Matter Physics
  • Mechanics of Materials
  • Materials Chemistry
  • Electrical and Electronic Engineering


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