Electronics Forum: printing defects (Page 1 of 33)

IPC/JEDEC standard for solder paste printing defects

Electronics Forum | Wed Mar 23 05:17:23 EDT 2011 | arwankhoiruddin

Hi All. I want to know what is the IPC/JEDEC standard for solder paste printing defects. From the brochures of SPI Machines, the recognized defects are excessive, insufficient, misalignment, no solder, bridging, and solder shape error. What document

IPC/JEDEC standard for solder paste printing defects

Electronics Forum | Fri Mar 25 14:33:26 EDT 2011 | davef

IPC-7525 Stencil Design Guidelines

IPC/JEDEC standard for solder paste printing defects

Electronics Forum | Fri Mar 25 06:03:40 EDT 2011 | arwankhoiruddin

Thank you for the reply, Davef. I am thinking if I can get the standard rather than "trial and error". If there is no such standard, is there any experience of what is the range for good and acceptable solder paste (e.g. minimum and maximum percenta

IPC/JEDEC standard for solder paste printing defects

Electronics Forum | Wed Mar 23 11:08:36 EDT 2011 | davef

There is no such standard, nor should there be. The important thing is to make good solder connections. That's IPC standardization focus, defining good results of manufacturing process. The approach that you take in developing the process of making g

pc board defects

Electronics Forum | Fri Sep 13 13:51:38 EDT 2002 | kenbliss

I recently saw an ad in a major trade magazine that stated: �about 60%of all printed circuit board manufacturing defects are due to stencil printing� I would like to hear comments from people that are running SMT lines, is this fact and if it is, w

pc board defects

Electronics Forum | Sun Sep 15 08:35:42 EDT 2002 | davef

That 60+% print defects number has been bantied around for so long in the electronic assembly business for so long that people believe that it's true. One starting point for this myth and lore is: "Where Quality Is Lost On SMT Boards" C Mangin, 'Cir

pc board defects

Electronics Forum | Sat Sep 14 12:24:44 EDT 2002 | scottefiske

We need to remember here that as printer manufacturers were enhancing their product lines, miniaturization was quickly being developed in the background. In the last 2 years I was involved in developing and conducting a D.O.E./F.M.E.A in determining

pc board defects

Electronics Forum | Sun Sep 15 15:08:00 EDT 2002 | jersbo

My 2 cents... Screen printing may very well have a leg up on deciding SMT defects... however if you pay attention to your stencil (aperture size ratio etc..) and inspect your prints... I believe its a much lesser number... (paste MFG also plays a ro

pc board defects

Electronics Forum | Fri Sep 13 18:58:12 EDT 2002 | slthomas

I can't give you itemized values for each defect category because we don't ask operators to distinguish between them, and we haven't done any serious research to do so either. I do wonder this, though. I read data somewhere from 14 years ago statin

Solder balls defects

Electronics Forum | Wed Aug 01 08:58:02 EDT 2018 | 2219576

Please check the solder paste height near PCB edges, Please check board clamping during solder paste printing. Please check tooling support boards must be fixed during the printing process. try to set wiper cleaning frequency and fine tune for best

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