Polymer-metal composite thin film microcap packaging technology using low temperature SU-8 bonding

Jinnil Choi, Yong Kook Kim, Soo Won Kim, Byung Hyun Nam, Byeong Kwon Ju

Research output: Contribution to journalArticlepeer-review

3 Citations (Scopus)


This paper reports a packaging technology involving a lightweight, low temperature bonding process with a polymer-metal composite thin film microcap. A layer of SU-8, in the form of sealing rims, is used as an adhesive to bond the micro and nano-electromechanical systems (MEMS/NEMS) substrate with the microcap due to the excellent properties of SU-8 as a packaging material. A silicon oxide thin film layer is formed on the carrier wafer by using a furnace to separate the microcap from the carrier wafer once the bonding process between the host and the carrier wafer is complete. In addition, the thin-film polymer microcap retains its original shape and acts as a protective layer for the cavity after the carrier wafer is released. To characterize the bonding strength, tensile tests have been carried out, and the measurement results show that the bond strength is up to ∼15 MPa. This means that the proposed packaging method, with the thin-film polymer microcap on the host wafer, was successfully realized by the low temperature bonding and transfer process. Finally, to check and verify the mechanical conditions, such as stress and deflection, of the microcap in the atmosphere, finite element (FE) analysis has been performed.

Original languageEnglish
Pages (from-to)11613-11618
Number of pages6
JournalJournal of Nanoscience and Nanotechnology
Issue number11
Publication statusPublished - 2016

Bibliographical note

Funding Information:
This research was supported by the Basic Science Research Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Science, ICT and Future Planning (NRF-2014R1A1A1008010).

Publisher Copyright:
Copyright © 2016 American Scientific Publishers All rights reserved.


  • Bonding
  • Finite element analysis
  • Micro/nano-electromechanical systems (MEMS/NEMS)
  • Microcap packaging

ASJC Scopus subject areas

  • Bioengineering
  • General Chemistry
  • Biomedical Engineering
  • General Materials Science
  • Condensed Matter Physics


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