pp. 2897-2903
S&M1727 Research Paper of Special Issue https://doi.org/10.18494/SAM.2018.1967 Published: December 18, 2018 Room-temperature Hermetic Packaging Using Ultrasonic Cu–Cu Bonding with Compliant Rim [PDF] Ryo Takigawa, Keiichiro Iwanabe, Akihiro Ikeda, Takayuki Takao, and Tanemasa Asano (Received April 23, 2018; Accepted July 4, 2018) Keywords: hermetic packaging, compliant rim, room-temperature Cu–Cu bonding, ultrasonic bonding, MEMS packaging
In this paper, hermetic packaging using room-temperature (RT) Cu–Cu bonding is demonstrated for microsystem packaging. The bonding of the compliant rim made of Cu to electroplated Cu was performed with ultrasonic assist at RT. Owing to the cone-shaped cross section of the compliant rim, it easily deforms under pressing load with ultrasonic assist and bonds to the counter Cu film at RT. As a result of a simple vacuum test, the air leak rate of the cavity inside the bonded sample was approximately 2 × 10−11 Pa·m3/s, which may be sufficiently low for applications of vacuum packaging of microdevices.
Corresponding author: Ryo TakigawaCite this article Ryo Takigawa, Keiichiro Iwanabe, Akihiro Ikeda, Takayuki Takao, and Tanemasa Asano, Room-temperature Hermetic Packaging Using Ultrasonic Cu–Cu Bonding with Compliant Rim, Sens. Mater., Vol. 30, No. 12, 2018, p. 2897-2903. |