Title: Comparison of QFN chips glued by ACA and NCA adhesives on the flexible substrate
Authors: Hirman, Martin
Steiner, František
Navrátil, Jiří
Hamáček, Aleš
Citation: HIRMAN, M., STEINER, F., NAVRÁTIL, J., HAMÁČEK, A. Comparison of QFN chips glued by ACA and NCA adhesives on the flexible substrate. In: Proceedings of the 22nd Microelectronics and Packaging Conference (EMPC 2019). Piscataway: IEEE, 2019. s. 1-7. ISBN 978-0-9568086-6-0.
Issue Date: 2019
Publisher: IEEE
Document type: konferenční příspěvek
URI: 2-s2.0-85078843953
ISBN: 978-0-9568086-6-0
Keywords in different language: non-conductive adhesive;anisotropically conductive adhesive;UV curing;PET substrate;conductive connection
Abstract: The paper deals with the QFN components assembly to the PET substrate with silver conductive pattern by anisotropically conductive adhesive (ACA) or non-conductive adhesive (NCA) with UV curing. Motivation for the experiment was to investigate and compare conductive joints prepared by ACA and NCA and make comparison of their reliability during the accelerated climatic ageing. For the NCA adhesive, the electrical conductivity was achieved by mechanical contact of the QFN component pads and substrate pattern pads. Therefore, the downforce on the QFN chip during the UV curing was important just as the adhesive´s shrinkage rate. The assembly of the QFN components by non-conductive adhesive had similar or better properties in comparison with anisotropically conductive adhesive (ACA) joints and therefore non-conductive adhesives could be recommended for some special applications.
Rights: Plný text není přístupný.
Appears in Collections:Konferenční příspěvky / Conference papers (KET)
Konferenční příspěvky / Conference papers (RICE)

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