Robust laser micro welding of aluminum and copper for vehicle electrical systems

An upgraded double-sided cooled power module is presented which overcomes the current disadvantages of conventional modules considering power density and efficiency. Besides a detailed description of the new assembly, in this context an introduction is given into joining processes by laser micro wel...

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Bibliographic Details
Main Authors: Hugger, F., Weigl, M., Loffler, N., Schmidt, M.
Format: Conference Proceeding
Language:English
Subjects:
aluminum
Cooling
Copper
electronic packaging
laser beam welding
Power lasers
power module
Shape
Substrates
Welding
Online Access:Request full text
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Summary:An upgraded double-sided cooled power module is presented which overcomes the current disadvantages of conventional modules considering power density and efficiency. Besides a detailed description of the new assembly, in this context an introduction is given into joining processes by laser micro welding. The laser is a promising tool for highly automatable and most efficient packaging technology. This paper describes methods to increase the process robustness of hard to weld electronic materials which can be effectuated by pulse shaping and adapted laser wavelength. Moreover the impact of laser processing upon weld deformation is investigated.
DOI:10.1109/EDPC.2012.6425123