Electronics Forum: dust level standard for smt line (Page 1 of 5)

Looking for IPC or other standard for electronics / electro-mech

Electronics Forum | Mon May 07 16:49:59 EDT 2001 | davef

Ashok, What in earthly heaven does this question have to do with "site support"? You can�t always get what you want, but sometimes you get what you need. Some leads are: * The proposed IPC cable/wire harness document is now IPC/WHMA-A-620 and go

What defect in SMT will be cuased by dust contamination?

Electronics Forum | Sat Feb 27 15:14:08 EST 2021 | researchmfg

Does anyone know what defect in SMT will be caused by dust contamination? What dust level in SMT environment is recommended? Recently an audit come to factory and ask we must control the amount of dust. Why SMT line need to control the dust level?

What defect in SMT will be cuased by dust contamination?

Electronics Forum | Tue May 25 18:08:19 EDT 2021 | scarittagle

A certain degree of cleanliness is needed in SMT manufacturing environment but not as overkill as place it in a "clean room" environment... Yes, dust could cause defect on PCBAs (and there are research papers about it too) but onl

SMT line validation

Electronics Forum | Thu Feb 23 10:49:38 EST 2006 | slthomas

Defining failure modes will help determine what you need to quantify in all processes. Personally I wouldn't pursue the DoE angle (varying setup parameters to determine robustness). 1)How about % pad coverage, paste thickness, and accuracy? Define w

What should be the ideal Purity level of incoming Nitrogen for SMT

Electronics Forum | Mon Aug 19 13:00:31 EDT 2019 | ameenullakhan

Thanks Steve for mentioning the purity level .., Our purchase and sourcing team was asking us what is our expectation on purity level. Based on which they are checking with supplier. So wanted to know any standard which is followed for the same. R

Re: acceptable defect rates for smt process, in ppm.

Electronics Forum | Mon Jan 17 12:16:02 EST 2000 | Brian W.

My old company (CM) ran SMT to 50ppm including some very complex boards. We established the normalizer number by: #components + #solder joints. As was stated earlier, the ppm for any given product is the result of many factors. You may get differen

Question for everyone regarding part placement on the SMT line (feeder position)

Electronics Forum | Tue Jan 28 16:34:34 EST 2020 | spoiltforchoice

I genuinely think component verifier on the machine is the optimum solution. Even then it can probably get caught out, we build some instrumentation that can have 10K 1%, 10K 0.1% and 10k 0.1% 2ppm, a verifier won't catch those getting mixed up,likew

Books for SMT

Electronics Forum | Tue Jan 16 20:34:17 EST 2007 | davef

DAVE�S BOOKSHELF ASSEMBLER�S ESSENTIALS Title: Soldering in ElectronicsAuthor: RJ Klein WassinkPublisher: Electrochemical PublicationsISBN: 090115024XPublication date: December 1989 I know, I know. The book was written in 1989!!!! I use this b

PCB baking for rework

Electronics Forum | Wed Jul 17 11:45:48 EDT 2002 | fmonette

The current IPC/JEDEC standard J-STD-033 for moisture-sensitive devices does not include a bake cycle at 90C (it includes cycles at 40C and 125C for non-assembled components in reels or trays). However, the upcoming revision, which should be release

Polarity for SMT Devices

Electronics Forum | Tue May 28 21:00:59 EDT 2002 | davef

That is the rub here, isn�t it? For those posting, it�s easier [but much slower] to start a new thread than to search the archives. [And posters could view their issue so unique and novel that it could never have been discussed several years earlie

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dust level standard for smt line searches for Companies, Equipment, Machines, Suppliers & Information

KingFei SMT Tech
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