Direct microwelding of dissimilar glass and Kovar alloy without optical contact using femtosecond laser pulses

In the current microwelding process using femtosecond (fs) laser between dissimilar materials, surface polishing and pressure assistance, so-called optical contact, are believed necessary. this paper, direct welding of soda lime glass Kovar alloy a fs is investigated to overcome limit contact. The processing comprehensively studied by varying power, velocity number welding. shear joining strength as high 2 MPa. cross-section glass-Kovar joints, elemental diffusion fracture behavior welded joints were studied. results show that irradiates alloy, micron/nanometer-sized metal particles generated. These perform role an adhesive part in process. It Si atoms diffuses from partially replaces Fe2+ ions on indicating mixing interdiffusion materials have occurred during Finally, sample was tested has excellent water resistance sealing property. Furthermore, justify method can be applied other stack ups, glass-copper, glass-Al6063 sapphire-ceramic also together. This work greatly simplifies promotes its industrial applications, such optoelectronic devices, medical devices MEMS.