PCB etching mask with fiber laser
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- Опубликовано: 21 май 2022
- The mask is normal black matte alchidic spray paint.
This method is much more convenient, faster and accurate than using techniques such as toner transfer.
Laser source: 1064nm JPT 50W
Laser settings: 30% 1500mm/s 40KHz
Hatch: 1 pass 0.05mm monodirectional, cross
2 passes at 5000DPI did me perfect. 3 mins in ferric chloride and the results are extremely sharp crisp lines and text. So much better than the 600DPI toner transfer days!
OMG this is so beautiful
Neat and quick process. Kudos.
Hola 👋, excelente video amigo 😉, un saludo 👋.
If you do more passes, each one with a different pattern an less power, you can leave al cooper traces clean but you need to invert your image file
In my experience, when the remaining copper layer is very thin, also with low power in some areas it detaches from the substrate in an non uniform way. Maybe the material behind copper produces some gas which expanding forms bobbles. Have you some settings to share? Lightburn for galvos has a great sublayers support which would be great to simplify a multipass, multipattern, multipower process!
@@davidemognaschi have you thought about using a UV laser to prevent heating of the substrate? Great video thanks for sharing.
Do you happen to have the full process of creating a PCB? I mean this video looks beautiful I do love to try a galvo too in the future. But that plate itself is copper right? you add some paint and laser those paths. wouldn't that mean the whole plate you etched is still a single lane? what do you do after this?
Acid will eat all the open copper area. Only hidden (Ink) will remain. Understood?
What kind of paint did you use?
lightburn or ezcad for laser settings?
Which paint do you use?
Excellent job, used to do same way back in uni days
Used an alchidic black matte spray paint, those used to paint plastic spoilers, but any matte spray paint works well because the laser removes the whole layer in one time, leaving the copper layer very clean.
Nice! sometimes i make a pcb in my 50W, but it remove cooper , and get a ready pcb,.
Rick it was also my first attempt, but I've not found the right settings to not burn the substrate after the copper layer is removed. Have you some settings to share?
@@davidemognaschi Hi Davide, Jeffery have a video about pcb. ruclips.net/video/-TPm1eSm2J4/видео.html . After marking cleaning the pcb with a toothbrush and soap.
Awesome.
No sound?!
How l can make this by arduino
cool!
Can you please tell me what program was used to create the g-code? Is it possible to make it burn the entire polygon completely?
With the next video I'll share my toolbox. IMHO this technique is very effective and works well also with a cheap CNC laser diode, but slowly. Also, I found a simple way to add a solder mask layer. Stay tuned!
Oh great, may I know the set up process of that, because I am struggling to get dxf file from gerber data(please...)
Sure! FlatCAM is THE way! Simply export your Gerber files and import the layers in FlatCAM. This cool software is amazing: it can convert copper layers, drills, PCB layout, silk masks into geometries, which then you can export and use for laser engraving. A very important tip: set an outer offset to the width of your laser beam or the narrowest traces will be burned out.
@@davidemognaschi, thanks man I really appreciate your reply, if possible can we have one virtual meeting.
Would like to se this with 5 mil trace/gap to see how well it does.
I'll try!
If you need finer details you can purchase a smaller focal theta lens, like 80 or 100mm.
I’m now interested to try this on mine!
@@lazerusmfh good point! Beware, with a shorter focal length you get also a smaller area. Let me know your findings!
make Lesr CNC full coust
How small of an ic package can this handle? Is .3-.5mm pitch doable?
I think so, but I've never tried with such thin traces. I think the most critical part is not so much the preparation of the mask with the laser, which undoubtedly has the necessary precision, but the subsequent removal of the copper with acid. Very fine traces require controlled time and temperature.
i need the complete laser and accessories. where to buy?
I brought mine on eBay from a Chinese manufacturer. Here in Italy you must consider high duty taxes when the good comes from outside UE.
Why not remove the copper directly since its fiber it can I suppose. Saves time of etching and nastiness.
Nope, the energy required to remove a thin copper layer can cut through the FR4 substrate, burning all the thing.
@@davidemognaschi use fr1 instead. It’s mostly unaffected by the laser - unless you dwell in one spot.
@@iainwade Good to know! But FR1 is less widely available and less cheap. Nowadays home made PCB are good only for diy projects, where price and material are constraints. So, any material + almost any laser source + almost any spray paint is a sweet spot.
How strong is Your fiber laser? I mean optic power 20, 30 100W?
It's rated 50W, but it's not required an high energy laser to remove a thin paint layer. An 3W laser diode works almost the same. Here, the galvo heads makes all the difference in terms of speed.
alguien sabe como se llama este tipo de laser?
Does anyone know what this type of laser is called?
This is a 1064nm fiber laser
@@davidemognaschi infrared? Thanks.
Yes, it's an infrared 1064nm fiber laser.
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Our corporation is an independent electronic components distributor in China.
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Cool bro! Any interest in any cooperation together? (PCBWay)
interessante ho una macchina in magazzino che vorrei testare ma non la ho mai provata...
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5000$ of fiber laser for etching a pcb seems to be too much.....
It's really true! But if you have one, why not do it? it is an expensive tool, but also a very versatile one.
if your local library is worth anything, they will have a makerspace with a laser.
Ager is technology ka kisi ko pata na hota to india me is technology ko use karne wale ko bhi bhagwan bana dete hindu