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Two sapphire substrates were bonded using a fresnoite glass thin film as a sealant, by irradiation with a 1,064 nm ns laser. The sapphire close to the interface was examined by TEM, showing some structural defects due to the laser processing. Bond quality and strength were evaluated by scanning acoustic microscopy (SAM) and micro-chevron testing, respectively. Optimization of laser parameters lead...
Two sapphire substrates are tightly bonded through a fresnoite-glass thin film, by irradiation with a 1,064 nm nanosecond laser. The composition of the glass solder at the bond interface changes, due to incorporation of Al from the upper substrate. The oxidic solder remains amorphous after laser irradiation, but after annealing (850 °C for 1 h) crystalline structures are observed in different morphologies,...
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