Author Topic: PCB Fab with best silkscreening?  (Read 1028 times)

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Offline 1276-2449-1-ND

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PCB Fab with best silkscreening?
« on: May 10, 2018, 12:31:19 am »
I have a bunch of boards that are used as panels and need good looking silkscreening. Nothing crazy -- the current LPI or mesh size used by most board houses is suitable. However the silkscreening shouldn't be smudged or smeared, have defects caused by clogged screen, spots from holes in the screen emulsion, blurry edges from overexposed screens, have offcolour inks or soldermask, have heavy scratches or tooling gouges, etc...

I currently get them done through Dirty PCBs (because they have no problems with pre-panellized PCBs) and most of the time they do an okay job. But occasionally they come back with effed-up silkscreening -- something Dirty PCBs has no control over because they farm them out to any number of board houses.

Can anyone recommend a fab that does a consistently decent job on silkscreening (preferably one that does their own PCBs so they can be asked to take care that the silkscreening comes out okay)?
 

Offline jeduffy

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Re: PCB Fab with best silkscreening?
« Reply #1 on: May 13, 2018, 03:27:51 am »
Advanced circuits is a pretty standard professional fab, but priced to match. Sunstone is pretty good as well, and is significantly cheaper, but I haven't used them in a couple years.
 

Offline mairo

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Re: PCB Fab with best silkscreening?
« Reply #2 on: May 14, 2018, 10:07:58 pm »
I am also looking for a good and cheap  8) PCB manufacturer that can do very good silkscreening.

These Korean guys seems to have positive reviews online, but have never tried them myself:
http://quickturnpcb.co.kr/

 

Offline jeremy

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Re: PCB Fab with best silkscreening?
« Reply #3 on: May 14, 2018, 11:20:26 pm »
What you want for the really good stuff is not silkscreening, but a second layer of white soldermask. This is what they do on the official arduino boards for the silkscreen (take a look at one, if it’s a genuine one the white text and drawings should be extremely crisp). This isn’t printed or silk screened, it is applied as a liquid polymer and then lithographically processed beyond that.

If your order is big enough I’m sure most factories would do it for you.
 
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Offline sam512bb

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Re: PCB Fab with best silkscreening?
« Reply #4 on: May 15, 2018, 11:34:53 pm »
<snip>

These Korean guys seems to have positive reviews online, but have never tried them myself:
http://quickturnpcb.co.kr/

I have been a customer of theirs for almost 8 years!  They do great work and are fast.  I am continually impressed with their quality and they are the only shop that I send my 4+ layer boards to.

Cheers,

Sam
 

Online T3sl4co1l

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Re: PCB Fab with best silkscreening?
« Reply #5 on: May 16, 2018, 03:06:55 am »
Well, you get what you pay for.  But even top-price suppliers will make blemishes and leave them in, unless your spec says otherwise.

Typical example, PCBCart does what looks like a raster (inkjet) process, rather than "silkscreen" as such.  It has reasonable resolution, apparent blocky edges, and a streaky scan (much as dirty nozzles in any inkjet looks).  I haven't noticed any voids, but if you need a solid layer, for appearances, or for insulation, you'll want to request a second coat (nonstandard process, $).

You can also get multiple soldermask layers or colors, if you like; there's a lot of flexibility in PCB fab, but you have to be willing to pay for it, as soon as you stray the slightest bit from the commodity proto service.

Tim
Seven Transistor Labs, LLC
Electronic Design, from Concept to Layout.
Need engineering assistance? Drop me a message!
 

Offline flasonsmts

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Re: PCB Fab with best silkscreening?
« Reply #6 on: July 22, 2018, 11:01:24 pm »
infact the Chinese PCB manufacturer do a perfect job on PCB prototype and production
SMT reflow oven wave soldering machine pick and place machine SMT assembly line https://www.flason-smt.com/
 

Offline Alex Eisenhut

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Re: PCB Fab with best silkscreening?
« Reply #7 on: July 23, 2018, 02:35:25 am »
Best "silkscreen" (legend print) is LPI, same process as soldermask.
 


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