Achieving of aluminum–aluminum wafer bonding at low temperature and pressure using Surface passivated technique

Bonam, Satish and Kumar, C Hemanth and Vanjari, Siva Rama Krishna and Singh, Shiv Govind (2019) Achieving of aluminum–aluminum wafer bonding at low temperature and pressure using Surface passivated technique. In: 21st Electronics Packaging Technology Conference, EPTC 2019, 4-6 December, 2019, Singapore,.

Full text not available from this repository. (Request a copy)


Micro-electro-mechanical systems (MEMS) device packaging has proven to be more costly and complex, and it has been a substantial barrier to the commercialization of MEMS. Because of the reason there is a huge requirement of vacuum seal packages for MEMS devices at low cost at low thermal budgets. In this work, we are proposing a method of developing direct aluminum-aluminum (Al-Al) wafer frame bonding using themo-compression bonding method. However, the formation of chemically stable surface oxide, immediately after exposed to ambient conditions, is a major inter-diffusion barrier for grain growth across the interface of bonding. To break this barrier requires high temperature (minimum of ∼450 °C) and pressures, which may cause the some of the MEMS devices may damage or properties of CMOS devise may change. Therefore, we motivated towards the formation of direct Al-Al interconnect at the low temperature and pressures using surface passivation of another noble metal (Palladium (Pd)) for wafer level thigh seal encapsulation for MEMS. Here, we studied the effect of Pd on Al surface and optimization of minimum Pd thickness to protect the surface from oxidation. Based on AFM, XRD, C-SAM, SEM, EDX analysis, the role of Pd on Al Surface for hermetic sealing applications were discussed.

[error in script]
IITH Creators:
IITH CreatorsORCiD
Vanjari, Siva Rama KrishnaUNSPECIFIED
Singh, Shiv Govind
Item Type: Conference or Workshop Item (Paper)
Uncontrolled Keywords: Aluminum,MEM,SSurface passivation, Thermo-compression bonding,Tight sealed encapsulation
Subjects: Electrical Engineering
Electrical Engineering > Wireless Communication
Electrical Engineering > Process Control
Electrical Engineering > Power System
Electrical Engineering > Automation & Control Systems
Electrical Engineering > Electrical and Electronic
Electrical Engineering > Instruments and Instrumentation
Divisions: Department of Electrical Engineering
Depositing User: . LibTrainee 2021
Date Deposited: 26 May 2021 05:42
Last Modified: 26 May 2021 05:42
Publisher URL:
Related URLs:

Actions (login required)

View Item View Item
Statistics for RAIITH ePrint 7819 Statistics for this ePrint Item