Nano Archive

Characterization of localized laser assisted eutectic bonds

Tan, A. W. Y. and Tay, F. E. H. and Zhang, J. (2006) Characterization of localized laser assisted eutectic bonds. Sensors and Actuators A: Physical, 125 (2). 573 - 585.

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An innovative bonding process for silicon and single crystal quartz has been developed and investigated using various material science characterization methods, such as TOF-SIMS, SEM, EDX and XRD. The bonding process combines the principles of laser transmission welding, eutectic bonding and bonding by localized heating. A focused laser beam (low power, max. 0.83 W) is transmitted through a quartz medium to intermediate layers of chromium, gold and tin at the silicon–quartz interface to provide localized heating and bonding. This bonding process is particularly suitable for bonding wafers containing temperature sensitive devices as it confines the temperature increase to a small area. Bond strength of over 15 MPa is comparable to most localized bonding schemes. This process provides a simple yet robust bonding solution with rapid processing time, selectivity of bonded area and corrosion resistant joints.

Item Type:Article
Uncontrolled Keywords: Laser bonding; Interfacial characterization; Eutectic; Low temperature; Single crystal quartz-to-silicon; Gold–tin
Subjects:Analytical Science > Nanotechnology for sensing and actuating
Material Science > Nanostructured materials
ID Code:4675
Deposited By:SPI
Deposited On:08 Apr 2009 15:18
Last Modified:08 Apr 2009 15:18

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