Open Source Photolithography System
Basics
- Part of the Open Source Advanced Materials Construction Set
- Essentially a better Open Source PCB Photoengraving System (ie smaller traces can be made;to CPU Levels instead of PCB Levels)
- A device that uses a photosensitive maskant and a laser/dlp projector/electron beam to create the traces in the maskant. This is then etched using a chemical etchant
Used For
- The Open Source Advanced Electronics Construction Set
Industry Standards
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Existing Open Source Devices
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Minimum Viable Product
- Fast
- Easy to Use (upload file and press print)
- Recycles its own / can use recycled chemicals
- Cheap to run
- Scalable (both in physical size ,and precision/ability (ie pcb engraving at the low end and cpu manufacture at the high end)
Basic Design
Feedstock Module
- 1 or more of these
- Holds PCB's, Silicon wafers etc
Conveyor Belt Module
- Carryies feedstock from the feedstock module to the next module
- should be relitively unreactive (ie Plastic or ceramic)
Prewash Module
- Washes and dries the feedstock to prevent contamination errors in the next modules
Photoresist application module
- Applies the Photoresist
Exposure Module
- Exposes the photoresist to light
- Can be either a pattern in front of a UV Lamp, a laser, or a DLP UV Projector
Post Exposure Cleaning Module
- Cleans off the exposed photoresist
Etching Module
- Is a bath of chemical etchant that the conveyor belt dips into
- Dissolves the areas not protected by undeveloped photoresist
- May use plasma etching instead at this level (possibly)
Post Etching Cleaning Module
- Removes the Etchant
Post Processing Module
- Removes any remaining photoresist + delivers the finished product to the end of the conveyor belt
BOM
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See Also
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Usefull Links
- Wikipedia Page on Photoengraving