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Allowable max interval of solder paste printing -> Reflow -> wash ?

Electronics Forum | Wed Feb 14 16:58:12 EST 2018 | cbart

you would be best to get this from your paste/solder manufacture. but here are some rules of thumb: -Solder paste out of fridge before use - get out the night before needed.. don't let your op's warm on the oven!! you will regret that! if not over ni

Re: Solder Beading Solder Balling

Electronics Forum | Sat Aug 07 11:47:47 EDT 1999 | JohnW

| | | | | | | | | | | | Hello, | | | If you are using no-clean and they are entrapped in the flux it is also IPC accepted but i havent found a customer yet who agrees with that. Im sure you have checked your profile. I had the same problem with chi

Re: Cleaning procedures for Entek-Plus Cu-106A

Electronics Forum | Tue Apr 20 22:09:03 EDT 1999 | Earl Moon

| | I am wondering if anyone has any info regarding solder paste misprint clean-up procedures for Entek Plus CU-106A PCB's utilizing a water-clean solder paste. In a implementation procedure they recommend a 2-3 minute wash cycle with the following

Tenting via(s) under BGA & CSP?

Electronics Forum | Fri Apr 12 17:22:47 EDT 2002 | davef

First, splitting hairs on parlance. * Conformal Coating. A thin electrically nonconductive protective coating that conforms to the configuration of the covered assembly to provide environmental and mechanical protection. * Solder Mask. Coating mate

Copper oxide

Electronics Forum | Thu Jul 31 15:41:23 EDT 2003 | davef

Q: Could any of you guys tell me what exactly is this greenish thing ? A: No, but is not copper oxide. Copper oxide is brown, the color of a penny [here in the US] or an untreated copper laminated trace on a board. Many copper salts are greenish in

beware of job scam

Electronics Forum | Wed Feb 25 01:41:10 EST 2009 | exsydeco

hie, just to warn engineers/technicians and others that have thought of working in Italy. Please beware and be clear of what is being offered. - especially ASIAN Don't be fish in by the sweet talking owner. This is a personal experience and i am g

Typical placement speeds - please advise

Electronics Forum | Mon Jul 14 11:59:41 EDT 2014 | rgduval

I've primarily used MyData equipment, personally, and, optically centered devices definitely take longer than mechanically centered parts on a MyData, owing to the construction of the machine. With a fixed upward looking camera, the head has to pick

Re: Tin-Lead thickness on PWB's/Let's Hear More

Electronics Forum | Thu May 28 07:25:58 EDT 1998 | Earl Moon

| Hey yooze guys! | Enough of the jokes between you and Earl (GRIN), let's get back to the topic...well, okay... you can tell a few more...(but good ones, 'kay?) | Anyhoo...I'm not sure if ya'll are on the IPC Technet list or not, I've not seen any p

Re: Tin-Lead thickness on PWB's/Let's Hear More

Electronics Forum | Thu May 28 05:43:33 EDT 1998 | Earl Moon

| Hey yooze guys! | Enough of the jokes between you and Earl (GRIN), let's get back to the topic...well, okay... you can tell a few more...(but good ones, 'kay?) | Anyhoo...I'm not sure if ya'll are on the IPC Technet list or not, I've not seen any p


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