Electronics Forum | Mon Jan 27 07:28:24 EST 2020 | dontfeedphils
If I'm remembering correctly, I just had a board shop I worked with supply me with a 20"x20" copper laminated piece of FR4 and used that. I believe I only used it once before I left that company, so I'm not sure how well it holds up over time.
Electronics Forum | Fri Jul 24 03:23:34 EDT 2020 | xinyao
So I got this fully auto running machine line, that automatically pick, cut, edge grind, corner round the copper clad laminate, and I do not have a professional camara to shoot a video. How can shoot it with my phone, and still it looks amazing? Than
Electronics Forum | Wed Jan 17 03:35:07 EST 2001 | Arul
We have few failures similar to the discussion in this thread, on a 50 Mil pitch, 30 Mil mill Ball PBGA. Would like to understand the mechanism of the BGA reflow process bit more. Appreciate your response to the following. 1.We sheared few solder ba
Electronics Forum | Mon Dec 20 19:09:54 EST 1999 | Chris
If your flex circuit is only populated on one side, you can have the PCB vendor palletize the flex for you. What you do is have the flex circuit laminated to 062" FR4 using a thermoset adhesive like Dupont WA. Standard flex circuit adhesive. Howev
Electronics Forum | Fri Jul 16 14:34:18 EDT 1999 | Glenn Robertson
| We are converting from COB to SMT on a product line and want to optomize the PCB as far as Laminate, plating, passivation etc. This is a high temp application 150C. We are presently using BT Laminate but would like to get away from this. We are
Electronics Forum | Thu Oct 08 14:04:04 EDT 1998 | Kris Ewen
Manish, I've seen similar phenomenon when processing CSPs on our cards. In our case, we were placing the components over the opening to in-pad blind vias. Due to poor drilling and plating processes by our board suppliers, volatiles were outgassing
Electronics Forum | Wed Jul 03 10:32:05 EDT 2002 | davef
First, we have talked about drying / baking / demoisturizing / whatevering bare board previously. Search the fine SMTnet Archives to get started on recipes. Second and more importantly, you gotta fix this delamination problem. If it is delaminatio
Electronics Forum | Fri Jul 29 19:12:30 EDT 2005 | Jason Fullerton
In the true sense of the term, tombstoning can only occur during reflow. Now, if your solder joints are cracking during thermal cycling and opening on one end you still have a problem - it just isn't "tombstoning". What laminate are you using on yo
Electronics Forum | Fri Oct 17 22:36:35 EDT 2008 | arosario
Hi All, We just started build a new product and I am encountering many non-wet rejects in our new product. I need help on what should I look into to improve our Yield. Please see below back ground 1. We are using DEK Infinity as printer. 2. We are mo
Electronics Forum | Mon Dec 08 17:06:59 EST 2008 | boardhouse
Hi MGL, Couple things to ask, have the boards recently been changed to Rohs builds? STD FR4 to High TD Laminate. Check the stack-up the board houses are using. Just about all Rohs laminate has Resin starvation issues when used in single ply co
