TY - GEN
T1 - Development and evaluation of the porous Au structure for the thin film encapsulation
AU - Lee, Jae Wung
AU - Wang, Wei Shan
AU - Sharma, Jaibir
AU - Lin, Yu Ching
AU - Esashi, Masayoshi
AU - Bangtao, Chen
AU - Singh, Navab
PY - 2012
Y1 - 2012
N2 - 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.
AB - 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.
UR - http://www.scopus.com/inward/record.url?scp=84879752624&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84879752624&partnerID=8YFLogxK
U2 - 10.1109/EPTC.2012.6507145
DO - 10.1109/EPTC.2012.6507145
M3 - Conference contribution
AN - SCOPUS:84879752624
SN - 9781467345514
T3 - Proceedings of the 2012 IEEE 14th Electronics Packaging Technology Conference, EPTC 2012
SP - 563
EP - 567
BT - Proceedings of the 2012 IEEE 14th Electronics Packaging Technology Conference, EPTC 2012
T2 - 2012 IEEE 14th Electronics Packaging Technology Conference, EPTC 2012
Y2 - 5 December 2012 through 7 December 2012
ER -