Open Source PCB Photoengraving System

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- Part of the Open Source Electronics Construction Set

- A device that uses a photosensitive maskant and a laser/dlp projector to create the traces in the maskant. This is then etched using a chemical etchant

- Can allow for easier production of large volumes of PCB's quickly when compared to the D3D CNC Circuit Mill

Used For

- PCB Production

- IC Production

- Possibly

Industry Standards


Existing Open Source Devices


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

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



See Also


Usefull Links

- Wikipedia Page on Photoengraving

- Wikipedia Page on Photolithography

- Wikipedia Page on Printed Circuit Boards