LTCC white paper: Low Profile Transformers Using Low Temperature Co-Fire Magnetic Tape

  J Bielawski and George Slama, Midcom Inc.
   A.H. Feingold, C.Y.D. Huang, M. R. Heinz, and R. L. Wahlers, Electro Science Laboratories
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There is a growing need for transformers that are low-cost, small, low-profile, and surface-mountable. In addition, they must meet safety requirements while maintaining transformer efficiency. This paper discusses an approach geared to meet these requirements. It involves parallel LTCC processing of ferrite tape and low temperature (850-950 ° C) co-firing of the screen printed silver primary and secondary coils resulting in a small, low-profile, highly reliable product.