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Free standing tapes of donor doped BaTiO3 for multilayer positive temperature coefficient thermistors
Date
2020
Abstract
A disruptive method of fabricating free-standing tapes of La-doped (BaCaSrPb)TiO3 thermistors is demonstrated. The greatest advantage is that the free-standing tapes do not require high temperature co-firing of electrodes or reduced environment cofiring soft oxidation cycle to obtain thermal sensitivity. The approach thus solves the longstanding problem with the ceramic thermistor technology that eluded its compatibility with surface mount technology (SMT) and miniaturization. Stencil printing is employed that can fabricate up to 500 µm thick tapes in a single step, saving huge cost and processing steps for application requiring thicker films. The pastes suitable for freestanding tapes are reported. The method provides a novel route to integrate PTC elements into the chips of passive components and would lead to a massive reduction in cold resistivity when developed in multilayer laminated stacks.
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Description
peer-reviewed
Publisher
IEEE Computer Society
Citation
IEEE Transactions on Dielectrics and Electrical Insulation;27(5),pp. 1650-1655
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Ul_Haq_2020_Free.pdf
Adobe PDF, 685.81 KB
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Funding Information
Enterprise Ireland (EI), Irish Research Council (IRC), Higher Education Authority (HEA), Science Foundation Ireland (SFI)