Electronics Forum | Tue Mar 06 18:57:48 EST 2001 | pzohbon
I am looking at putting a laser or ink jet marking system for barcoding of pcb's in our smt production area. As and inline system it will need the capability to handle different size boards. We use dark green pcb's except for couple red and blues m
Electronics Forum | Wed Mar 07 02:29:22 EST 2001 | Cosine Theta
Barcode needs a light colour backgroup so that the scanner can read. No way you can mark on the solder mask and become readable. I found most of the time the investment cannot be paid back within 5 years. Most of the time it is product requirement th
Electronics Forum | Thu Mar 08 09:38:35 EST 2001 | blnorman
We've been using pre-printed labels on our PCB's for years, with 8 - 10 hours a week down time associated with them. Last October we put a CO2 laser marker on one of our lines. In 6 months we've had a total of 30 minutes down time. We use a 2D b
Electronics Forum | Wed Mar 07 20:37:38 EST 2001 | davef
I agree. The bar coded label you use should not be affected by the solder mask of the board. The label should have sharp contrast between the segments of the code to modulate the returned light and allow the reader to discriminate between light and
Electronics Forum | Tue Jan 16 16:15:03 EST 2024 | madisreivik
Have you considered laser marking ? Cheap chinese lasers can vaporize soldermask and leave "dark copper" marking.
Electronics Forum | Fri Jan 19 14:59:47 EST 2024 | carl_p
We used to use basic stampers years ago to define which shift & operator build which build before shifting to laser marking. You could use a stamper, failing that as the stamper worked I don't see why you couldn't use a basic stencil to mark what yo
Electronics Forum | Wed Jan 17 08:41:07 EST 2024 | spoiltforchoice
The neat and simple solution is indeed a laser. However I have seen other quirky ways to denote a build revision. These include a resistor with a value marking that matches the build revision e.g a 1K marked 102 could indicate assembly 1.02. Another
Electronics Forum | Mon Jun 19 10:26:43 EDT 2006 | slaine
Are you applying the ink onto the electronic assembly itself? if not then it doesnt have to be compliant.
Electronics Forum | Tue Mar 04 20:47:48 EST 2008 | davef
Available on the web, JEDEC PUBLICATION 95, DESIGN GUIDE 4.14, Ball Grid Array Package (BGA), Figure 4.14-3, Note 10: A1 corner must be identified by chamfer, ink, mark, metalized markings, indentation or other feature of package body, lid or integra
Electronics Forum | Fri Jun 16 08:20:59 EDT 2006 | jem
Thanks for your help. Looked for an MSDS on the ink but could not find one. All this ink was ordered long before my time. I will try to contact ink vendor again. J.E.M.
