Transactions on Electrical and Electronic Materials

The Korean Institute of Electrical and Electronic Material Engineers (한국전기전자재료학회)
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Development of Miniature Quad SAW Filter Bank based on PCB Substrate

  • Lee, Young-Jin (Electronic Components and Materials Division, Korea Institute of Ceramic Eng. & Tech) ;
  • Kim, Chang-Il (Electronic Components and Materials Division, Korea Institute of Ceramic Eng. & Tech) ;
  • Paik, Jong-Hoo (Electronic Components and Materials Division, Korea Institute of Ceramic Eng. & Tech)
  • Published : 2008.02.29
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Abstract

This paper describes the development of a new $5.0{\times}3.2mm$ SAW filter bank which is consist of 12 L, C matching components and 4 SAW bare chips on PCB substrate with CSP technology. We improved the manufacturing cost by removing the ceramic package through direct flip bonding of $LiTaO_3$ SAW bare chip on PCB board after mounting L, C passive element on PCB board. After that we realized the hermitic sealing by laminating the epoxy film. To confirm the confidentiality and durability of the above method, we have obtained the optimum flip bonding & film laminating condition, and figured out material property and structure to secure the durability & moisture proof of PCB board. The newly developed super mini $5.0{\times}3.2mm$ filter bank shows the superior features than those of existing products in confidence, electrical, mechanical characters.

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References

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