Ultrashort Pulse Laser Welding - A New Approach for High- Stability Bonding of Different Glasses

Abstract Ultrashort laser pulses at high repetition rates may overcome the problems of conventional bonding methods. While focusing in transparent materials, the laser energy is deposited locally in the focal volume due to nonlinear absorption processes. Heat accumulation of successive laser pulses at high repetition rates leads to localized melting of the material. If the focus is set at the interface of two transparent samples, the subsequent resolidification finally yields strong and robust bonds. Using optimized processing parameters, we achieved a breaking strength, which is comparable to the bulk material.

[1]  Saulius Juodkazis,et al.  Void formation in glasses , 2007 .

[2]  A. Tünnermann,et al.  Bonding of glass with femtosecond laser pulses at high repetition rates , 2011 .

[3]  K. Itoh,et al.  Ultrafast Processes for Bulk Modification of Transparent Materials , 2006 .

[4]  A. Utsumi,et al.  Direct Bonding of Glass and Metal Using Short Pulsed Laser , 2007 .

[5]  E. M. Liston.  Plasma Treatment for Improved Bonding: A Review , 1989 .

[6]  Stephen C. Jacobson,et al.  Low temperature bonding for microfabrication of chemical analysis devices , 1997 .

[7]  Ramona Eberhardt,et al.  Optical contacting of low-expansion materials , 2011, Optical Engineering + Applications.

[8]  K. Itoh,et al.  Direct joining of glass substrates by 1 kHz femtosecond laser pulses , 2007 .

[9]  Andreas Tünnermann,et al.  Breaking stress of glass welded with femtosecond laser pulses at high repetition rates , 2011, LASE.

[10]  E. Mazur,et al.  Bulk heating of transparent materials using a high-repetition-rate femtosecond laser , 2003 .

[11]  J. Nishii,et al.  Space-selective laser joining of dissimilar transparent materials using femtosecond laser pulses , 2006 .

[12]  Hongyu Zheng,et al.  Laser-effected darkening in TPEs with TiO2 additives , 2004 .

[13]  U. Gösele,et al.  Semiconductor wafer bonding , 1998 .

[14]  J. Nishii,et al.  Welding of Transparent Materials Using Femtosecond Laser Pulses , 2005 .

[15]  Réal Vallée,et al.  Reinforced direct bonding of optical materials by femtosecond laser welding. , 2012, Applied optics.

[16]  Andreas Tünnermann,et al.  Welding of transparent materials with ultrashort laser pulses , 2012, Other Conferences.

[17]  Kazuyoshi Itoh,et al.  Ultrafast laser microwelding for transparent and heterogeneous materials , 2008, SPIE LASE.

[18]  F. Yoshino,et al.  Fusion Welding of Glass Using Femtosecond Laser Pulses with High-repetition Rates , 2007 .

[19]  Bob Goss,et al.  Bonding glass and other substrates with UV curing adhesives , 2002 .

[20]  Andreas Tünnermann,et al.  Ultrafast laser processing: New options for three-dimensional photonic structures , 2004 .