Development and evaluation of the porous Au structure for the thin film encapsulation

Jae Wung Lee, Wei Shan Wang, Jaibir Sharma, Yu Ching Lin, Masayoshi Esashi, Chen Bangtao, Navab Singh

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Citation (Scopus)

Abstract

This paper presents the application of the Nano Porous Gold (NPG) for encapsulating the MicroElectroMechanical System (MEMS) devices. The NPG was realized by selective etching of the Sn from electroplated AuSn alloy on ap articular seed layer. However, it is very difficult to form through pores during selective etching process as seed layer does not contain Sn. This seed layer acts as barrier for the application of Thin Film Encapsulation (TFE) which need through etch holes in cap layer to remove the sacrificial layer underneath. So in this paper, different seed mater ials were studied to find comptability of the material with AuSn alloy as well as their suitability in easy etching to form the through etch holes after NPG formation. Cu and Ni were found the suitable seed layer for forming the AuSn alloy. During the above study, it was found that current density for electroplating of AuSn alloy is also very important parameter to fabricate the uniform AuSn alloy. It was found that 1.25 mA/cm2 is the optimum current density to achieve the AuSn alloy for TFE application. These parameters were used for demonstration of TFE.

Original languageEnglish
Title of host publicationProceedings of the 2012 IEEE 14th Electronics Packaging Technology Conference, EPTC 2012
Pages563-567
Number of pages5
DOIs
Publication statusPublished - 2012
Event2012 IEEE 14th Electronics Packaging Technology Conference, EPTC 2012 - Singapore, Singapore
Duration: 2012 Dec 52012 Dec 7

Publication series

NameProceedings of the 2012 IEEE 14th Electronics Packaging Technology Conference, EPTC 2012

Other

Other2012 IEEE 14th Electronics Packaging Technology Conference, EPTC 2012
CountrySingapore
CitySingapore
Period12/12/512/12/7

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials

Fingerprint Dive into the research topics of 'Development and evaluation of the porous Au structure for the thin film encapsulation'. Together they form a unique fingerprint.

Cite this