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Low-Temperature Bonding of Laser Diode Chips on Silicon Substrates Using Plasma Activation of Au Films

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4 Author(s)

A low-temperature bonding of vertical-cavity surface-emitting laser (VCSEL) chips on Si substrates was achieved by using plasma activation of Au films. After the surfaces of Au films were cleaned using an Ar radio frequency plasma, bonding was carried out by contact in ambient air with applied static pressure. The experimental results showed that surface morphological change (the reduction of asperity width) as well as removal of adsorbed organic contaminants by plasma treatment significantly improved the quality of joints. At a bonding temperature of 100degC, the die-shear strength exceeded the failure criteria of MIL-STD-883.

Published in:

Photonics Technology Letters, IEEE  (Volume:19 ,  Issue: 24 )

Date of Publication:

Dec.15, 2007

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