Working principle of exposure machine

The working principle of an exposure machine mainly involves photochemical reactions. The light emitted by the light source is irradiated on the sample or photosensitive material, triggering a chemical reaction to form a pattern. Specifically, the exposure machine uses a UV light source to illuminate the plate making material, causing a change in polarity on the photosensitive material. This usually involves a chemical change in the UV photosensitive adhesive, which reacts under UV light irradiation and undergoes subsequent steps such as development and fixation to form the desired image.

In the production of printed circuit boards and microelectronic devices, the exposure machine prints graphics on photosensitive films or silicon wafers through optical projection. In addition, there are electronic exposure machines that use electron beams instead of light for lithography, involving the emission, focusing, deflection, and scanning of electron beams to form charge patterns on the target object.

The structure of an exposure machine includes an exposure source, a reflector, photosensitive materials, a camera, a lens, an exhaust part, and an electronic control part. The electrical control department is responsible for controlling exposure time, lamp brightness, and automatic machine operation. The entire process involves converting the original image into a negative film on the film, then placing the negative film on a photosensitive material, illuminating it with an exposure lamp, and allowing the photosensitive material to record the image information.

Overall, exposure machines are important equipment in fields such as printing and circuit board manufacturing, and their working principles involve photochemical reactions and electron beam technology. Through precisely controlled light sources and optical systems, the designed images are transferred to photosensitive materials.