Diamond array was braze welded on the stainless steel substrate which was processed applying femtosecond and nanosecond laser pulses with pulse duration 40 fs and 5 ns, respectively. The threshold of diamond processed using femtosecond and nanosecond laser pulses was deduced by measuring the relationship between fabricated area and laser power. The processing results show that the threshold of diamond processed by femtosecond laser pulses is lower compared with that processed by nanosecond laser pulses. The morphology of the processed region using differentkinds of laser sources was also compared with microscope. The processing of diamond applying femtosecond was confirmed more effective than that using nanosecond pulses.