Electronics Forum | Mon Jun 02 15:03:05 EDT 2014 | clydestrum
Background on the PCB: Thickness: .032" Material: Standard Fr4 V-score: Leaves .016" (approx .008" cuts on either side) We are having some issues on these boards where the edges are delaminating all the way to the copper during de-panel. Now, we are
Electronics Forum | Fri Jun 13 16:23:47 EDT 2014 | esoderberg
I did not see any mention on the inner layer setback. We use 0.025" and have not had problems. Point loads with either a CAB or a FKN can sometimes be problematic. I would search out someone you know that has a fancort industries VDP5. This cuts th
Electronics Forum | Wed Jun 04 10:51:28 EDT 2014 | clydestrum
Well, we cannot make the cuts any deeper as then we would incur a significant amount of "bowing" at SMT placement/reflow. -Has anyone ever heard of changes in material/laminate makeup that causes this? A sort-of stronger, or more flexible tensile st
Electronics Forum | Mon Jun 09 10:03:40 EDT 2014 | clydestrum
Well, typically we put rails on a lot of the boards due to the absence of fids and/or tooling holes. We do have a fixture that is somewhat universal that I could try to introduce into the next run. Unfortunately, the next run does not help my proble
Electronics Forum | Wed Jun 04 18:46:10 EDT 2014 | hegemon
Well, we cannot make the cuts any deeper as then > we would incur a significant amount of "bowing" > at SMT placement/reflow. Interesting. Could be a number of factors contributing. Here's a story.... In the beginning was the board design, and in
Electronics Forum | Thu Dec 23 15:10:50 EST 1999 | Victor Salazar
What we did was design or panels with routed out edges held on by tabs. This was very effective. All we use is a pair of pneumatic scissors to cut off the tabs. We are using from single-to 13 layer PCB's and we have had no problems with delamination
Electronics Forum | Wed Apr 08 00:49:37 EDT 1998 | Steve Gregory
Well...I think we just about beat this one to death, but I'll go ahead and add a couple more points to "pro-score" camp...WITH the caveat that it HAS to be done right! Yes, I will say that I've had to deal with the wrong spec'd or crappy scor
Electronics Forum | Wed Jun 10 17:04:10 EDT 1998 | David Spilker
| We're running into problems with board damage (broken traces, solder shorts) due to pliers and other bizarre tools being used for depanelization. I need some sort of fixture for this. A delrin plate with a slot cut to the correct depth and width mi
Electronics Forum | Fri Oct 13 17:21:05 EDT 2000 | Jason Nipper
A few weeks back we experienced a wave process problem where we received deposits on our pcb. At first we though it was dedrites but after an outside analysis of the deposits they were found to be tin. We have tried to remove the deposits with brus
Electronics Forum | Sun Apr 05 14:57:10 EDT 1998 | Earl Moon
| | | | | We are in the process of deciding whether to change a PCB product from a single board to a 3 up panel array. Could you please advise on the most effective removal design, either scoring or snap off, taking into account that material utili
