Electronics Forum | Fri Jul 13 08:54:18 EDT 2007 | rgduval
Has your board house reviewed the PCB layer stack? Make sure that the layers are balanced in copper weight, etc? Have you tried pre-baking the boards? We just had an issue with some boards warping that have never warped before for us. It happened
Electronics Forum | Mon Jun 15 06:21:13 EDT 2020 | ameenullakhan
Hi Team, Main reason for HIP are; 1. Warpage in component or PCB : Verified the part and PCB 1.6 mm thickness no warpage found. 2. Hip was at different locations : center as well as corner : So not because of warpage of component. 3.Solder paste equ
Electronics Forum | Tue Mar 06 14:10:52 EST 2001 | CAL
Are the voids in the balls of a BGA? Are you verifying this through x-ray if they are? some voids depending on size and location are some what accepted. Solder paste type? Solder paste date code? Humidity high? PCB's been stored in a truck trailer?
Electronics Forum | Wed Apr 18 01:07:25 EDT 2001 | MW
I some something like this. My package was not flat the belly of the body rested on the PCB. We found that every 4-5 part would wander to the side. What was puzzling is that the blowers would have blown it the opposite side. ultumately we proved
Electronics Forum | Wed Mar 18 01:50:45 EST 1998 | Phil Szypko
| | Hi all, | I would like to have some information regarding the paste in holes process.We are the Backplane manufacturing and dealing with lots of thick PCB and would like to change the processes from wave to paste in hole.Any feed back of info
Electronics Forum | Thu Jan 10 17:19:35 EST 2002 | George Polychroniou
Hi Dimitry: We are a vertically integrated provider of electronic manufacturing services based in Massachusets. Because of our diverse manufacturing capabilities (sheet metal, PCB assembly, plastic molding) we supply quality cost effectovely. Pleas
Electronics Forum | Tue Aug 13 01:44:19 EDT 2002 | kenbliss
This problem is the number one reason the electronics industry has moved the handling process of PC boards to the tray and tray cart handling process. It eliminates flexing of boards and therefore stops board damage ie. broken circuits and micro fra
Electronics Forum | Thu Nov 11 09:29:54 EST 2004 | rlackey
Wow, it's amazing what you can achieve with smoke & mirrors! Only joking. Does the original via hole covering solder get put on at the PCB fabrication plant, or by the customer? & Does the entire board get reflowed or do you have a process where ho
Electronics Forum | Fri Mar 11 10:47:24 EST 2005 | thaqalain
(1)While fixing feeders to reels ,some small componets are displaced or fell down out of reel and there will be discontinuty.In-fact there will be probability of this till we load magazines to machine. Is there any effect, I mean ultimately,will we g
Electronics Forum | Mon Jun 13 04:26:00 EDT 2005 | Joris Groot koerkamp
For the lead free reflow process we tested with our Vitronics 500smr oven. To reach the high temperature of the lead free profile was no problem. We are not using an active cooling system so the pcb's are maby to hot wen the leaving the oven. Can an
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