Electronics Forum: ic and inspection (Page 1 of 39)

Stencil cleanliness and inspection

Electronics Forum | Thu Jun 07 13:40:12 EDT 2001 | kerryn

Dave, We have very short runs (less than one hour). We have stencils all over the place waiting to be cleaned. It is too time consuming to scope each stencil to inspect for cleanliness. Do you know of any automated or scanning devices that can ra

Stencil cleanliness and inspection

Electronics Forum | Thu Jun 07 15:37:32 EDT 2001 | Claude_Couture

Kerryn, It's the first time I hear someone who needs an automated inspection machine to check the cleanliness of stencils. Why not improve on the cleaning method itself. I use ultrasonic batch cleaner. It takes 3 minutes to clean a stencil, 2 minutes

Stencil cleanliness and inspection

Electronics Forum | Tue Jun 05 13:23:27 EDT 2001 | kerryn

We are a high-mix/low-volume operation and end up cleaning 40 - 50 stencils per day. Does anybody know of an automated inspection system or "scanner" that can check a stencil for cleanliness?

Distributed Test and inspection

Electronics Forum | Fri Feb 14 11:45:11 EST 2003 | SV

I was wondering if you guys had any experience with a distributed coverage Test and inspection strategy (Awaretest Xi) and could point me to technical studies in the field. thanks

BGA assembly and inspection

Electronics Forum | Thu Sep 07 03:57:39 EDT 2000 | Steven Cheung

Does anyone know of a freely-available document which discusses the main considerations of BGA assembly and inspection (x-ray?). l need to know about pad sizes and inspection standards and when to underfill and when not to etc.. l am looking at ass

Stencil cleanliness and inspection

Electronics Forum | Wed Jun 06 21:19:41 EDT 2001 | davef

Consider running two sets of stencils and washing every four hours.

BGA assembly and inspection

Electronics Forum | Mon Apr 02 17:16:22 EDT 2001 | kward

Try IPC-7095. It is not free , but discusses in-depth Design and Assembly Process implementation for BGAs. Website is ipc.org

Stencil cleanliness and inspection

Electronics Forum | Tue Jun 05 16:40:46 EDT 2001 | kerryn

Thanks Phil. However, my objective is to identify stencils that are not 100% clean prior to sending to inventory. I want to catch it before the solder paste has a chance to dry and harden in the apertures. Kerry

Stencil cleanliness and inspection

Electronics Forum | Tue Jun 05 14:38:55 EDT 2001 | pteerink

You would be better served to check your print quality as you run. Any problems caused by dirty stencils ( plugged aps etc ) would show up right away as a defect. Search the forum for more on this subject. I seem to recall the same subject coming up

Stencil cleanliness and inspection

Electronics Forum | Tue Jun 05 20:45:54 EDT 2001 | davef

So, yer lookin' to detect a ~25um glob on the wall of the aperture on yer stencil, eh? Why not wash your stencils before you put them away? That's what we do. Give 'em a quick looksee, then rack 'em, if they're clean. Give 'em anudda looksee befo

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