What is the Role of Photoimagable Thick Film Screen Printing Machine
Screen printing is a printing technique where a mesh is used to transfer ink onto a substrate, except in areas made impermeable to the ink by a blocking stencil. This is made from old technology. Initially used for silk.
At this time, thick film in all its variations (from classic hybrids to chip components, even LTCC and HTCC and MLCC) are getting smaller and smaller; and this technique is getting popular. To improve the fineness of the result (normally less than 75 mircon), the photoimaging process is involved.
The process steps are:
High Intensity UV LED exposure(photomask)
Abrasive Water Spray Developing
This technology is not a new technology, and it has been developed over time.
The key here is using a semiconductor like technology to create a fine line pattern, instead of or with traditional trimming. The paste binder has a photosensitive polymer in it, which can be "activated" by normal UV exposure. Exposure is done through plastic or glass photomask, then developed by DI water nozzle. Our partner can recycled the material that got washed out and reclaim them to as pure metal. Even better, it doesn't need a yellow room to achieve that.