Electronics Forum | Mon Jun 15 23:19:38 EDT 2020 | kylehunter
You literally just loosen both hex bolts and slide the bar to the pitch you want. Then tighten the bolts. You can also remove the bar, and flip it over to get additional pitches.
Electronics Forum | Tue Jun 16 14:26:41 EDT 2020 | rsatmech
Hello all, I am randomly getting solder short due to voids in the BGA Reference image attached. Kindly provide your thoughts on this as how to approach to resolve this issue.
Electronics Forum | Tue Jun 16 17:51:49 EDT 2020 | emeto
Your statement is interesting, but not necessarily correct. Are shorts in the same location? Is it one short or multiple? Are there any vias in the BGA pads on the PCB? Is part MSD and handled as ESD?
Electronics Forum | Wed Jun 17 15:20:18 EDT 2020 | rsatmech
Thank you for your valuable inputs. Current two SMT line is running and I have initiated to use two different pcb suppliers in each line. Do I need to check the plating details in issue pcba or random pcb. Kindly suggest.
Electronics Forum | Thu Jun 18 12:43:45 EDT 2020 | emeto
I would say you check FAB drawing and see if there is any strange value on the stackup. Usually board house should inform you of these.
Electronics Forum | Fri Jun 19 03:17:45 EDT 2020 | rsatmech
We also don't inspect any things in incoming PCBs. We have CMM but will be used when we see any abnormality. Kindly advise me on this.
Electronics Forum | Tue Jun 30 09:59:44 EDT 2020 | cph4w
Hi SRINI, Are you able to show X-ray of these 2 locations from other board w/o bridging? Void looks almost perfect circle which I never encountered before.
Electronics Forum | Tue Jun 30 10:25:37 EDT 2020 | rsatmech
Hi CPH, Thanks for your response. Sure I will share. But give me some time since we stopped SMT as of now. I will share you on 7/07/2020
Electronics Forum | Wed Jul 08 02:50:30 EDT 2020 | rsatmech
Hi DucHoang, Thanks for the response. I will share the images. We are using OSP boards and issue is not at particular BGA. Can you suggest me any methods to identify the pad contamination.
Electronics Forum | Fri Jul 10 17:27:25 EDT 2020 | rsatmech
Hi, Image 1 - Solder short image Image 2 Same component X ray image Image 3 PCBA Solder short pad image (after removing the component) Image 4 Component pad image Image 5 PCBA pad image after tinning.
