Skip to main content
shopping_basket Basket 0
Login

Serigraphy for PCB

Rlm77
10
Rlm77 has not written a bio yet…

Comments

December 17, 2018 08:58

Nice article! we get some good explanation about the screen printing equipments, everyone should read this article as well because it's really helpful.

0 Votes

January 7, 2019 08:39

@Jasakonveksi Maybe later I can prepare a video on youtube

August 5, 2017 06:11

What on earth is an "insolator"???

0 Votes

March 26, 2018 07:29

@baylf2000 Insolation is exposure to the Sun's rays. So an insolator is a setup to expose the emulsion to sunlight (or a suitable alternative to sunlight). Most photo-sensitive emulsions for screen printing or other line graphics (vs gray scale) purposes are sensitive primarily to light towards the Ultraviolet (UV) end of the spectrum, and relatively insensitive to red or yellowish light sources like incandescent bulbs. Sunlight contains plenty of UV and near-UV light. Traditional florescent bulbs (vs the warm-white ones) put out enough near-UV to do the job, too - though usually not as quickly as the Sun. The insolator (which you could also call exposure frame) has to hold the screen with the emulsion and allow ways (like glass on top) to keep it flat, and to keep the screen with emulsion in position where it will be uniformly illuminated by the Sun or artificial near-UV light source.

August 5, 2017 06:11

@baylf2000 I would say the same thing as an Insulator...bravo on your outstanding observation skills...exceptional.

August 5, 2017 06:03

What are the practical trace size limits for a home DIY?

0 Votes

January 7, 2019 08:40

@jwzumwalt Sorry I have been absent for very long time, The size of your PCB depends on how big you can get the screen, and the copper plate, i have seen screens 1 meter x 1 meter and there are bigger screens, I dont really think you can get a 1 meter x 1 meter copper plate, the bigest size of PCB I have made is 30 cm x 30 cm PCB, and I had no problem at all with this size, so you can think easily on a bigger size. Best regards: Roberto López Mtz.

January 7, 2019 08:40

@jwzumwalt Sorry I have been absent for very long time, The size of your PCB depends on how big you can get the screen, and the copper plate, i have seen screens 1 meter x 1 meter and there are bigger screens, I dont really think you can get a 1 meter x 1 meter copper plate, the bigest size of PCB I have made is 30 cm x 30 cm PCB, and I had no problem at all with this size, so you can think easily on a bigger size. Best regards: Roberto López Mtz.

July 17, 2017 15:23

Excellent article, I have wanted to get into screen printing for my artwork so now that I know it could also overlap with PCB production I have a greater incentive!

One comment, if making double sided boards it may be worth printing the copper layers without holes, i.e. solid pads as then if there is any misalignment when drilling you will not have missing crescents of copper around the drilled hole (as done by PCB manufacturers).
Alternatively having custom pads with just a small hole to assist drill location for manual drilling may be an even better alternative when manually drilling.

0 Votes

January 7, 2019 08:39

@Boss Yes you're right two sided PCB requires a lot of precision on the alignment, this is the hard part, but as you already mentioned it need some holes to have a guide on the other side, I recommend atleast four holes one on each "corner" so the alignment is easier. Best regards: Roberto López Mtz.

Related Content

DesignSpark Electrical Logolinkedin