UV curing is currently one of the main directions of the UV-LED application industry. The research team of Bowling Green State University compared the effects of UV-LED and traditional UV light source for acrylate curing in 2007, studied the polymerization rate of the two and the performance of the resulting coating, and confirmed that UV-LED can replace the traditional UV light sources are used in various curing applications. Deep ultraviolet LED sterilization application
UV-LED curing
Huang et al. evaluated the possibility of replacing traditional UV lamps with high-power UV LEDs in the circuit board printing process. This article introduces two kinds of optical modules: the first type contains 6 1 W UV-LEDs arranged in a circle with a diameter of 50 mm; the second type contains 12 3 W LEDs, welded to a 100 mm diameter On MC-PCB. Both modules can emit a spectrum with a peak wavelength of 400 nm. In order to obtain a parallel light source, the first type of optical module uses a parabolic reflector, which increases the light intensity by 6 to 10 times and reduces the beam angle from 140° to 30°.
In order to approach the actual process, only the UV light source is replaced with a UV-LED module, and all other parameters on the automation system remain unchanged. After the etching is completed, observe the pattern and measure it with image measurement software. According to PCB standards, only samples with a relative error of less than 15% can be accepted. The results show that the use of UV LEDs in PCB printing is feasible.
