UV LED Printing Device for PCB Fabrication

Abstract

Photolithography is commonly used to fabricate printed circuit boards (PCBs) in micromanufacturing. It involves UV exposure to pattern portions of a thin film of a substrate before a geometric design is transferred from a photo mask to a light-sensitive substance (photoresist) on the substrate using light. Conventionally, metal halide lamps and UV fluorescent bulbs make up most of the exposure systems during photolithography. However, both systems are highly costly in educational establishments and consume high electrical energy. Moreover, they also have too broad UV radiation and are not appropriate for the sizes of PCBs that need to be mounted on the apparatus. Hence, this innovation aims to create a low-cost, portable UV exposure system that works well in educational settings by utilizing LED illumination technology.  In order to manage time, relay, and LCD, these UV LED exposures were built using a combined LED circuit with a controller board. With a dimension of 120 mm by 190 mm and 3 mm LEDs, the UV LED circuit generates a wavelength of 400 to 405 mm for the UV exposure system. Due to its powerful and flexible design capabilities, LED lighting may be integrated in any shape to create highly efficient illumination. The testing result shows that LED lights have higher application efficiency due to its ability to concentrate light in one area. Therefore, well-designed LED illumination systems may deliver light to the intended spot more effectively. They also brighten up instantly when powered on and can be turned on and off repeatedly. This research has highlighted the advantages of LEDs for infrastructure projects, such as exposure systems, which could be further developed for future technology.