Electronics Forum | Thu Jan 06 16:11:07 EST 2005 | Chunks
It appears your board house is having a problem with the solder resist (mask). From the couple pix it appear that the holes are being plugged by the mask, so your HASL is not able to be blown out during the hot knife process. Time to call your boar
Electronics Forum | Fri Feb 18 11:41:12 EST 2005 | Frank R.
Thanks Howard, I understand that it's excellent everywhere but the only thing with Stand-alone is how do you manage your production path if everything pass thru AOI? We produce a lot of PCB per year and as soon as a PCB break the standard path, it'
Electronics Forum | Thu Mar 17 09:30:59 EST 2005 | John S
We are moving into using fine pitch components in a double sided reflow process. In one of our test runs, we noted that some of the QFP's would move while reflowed on the bottom on the second pass and become defective. Is this being done widely wit
Electronics Forum | Tue Mar 22 12:04:31 EST 2005 | John S
Thanks for the advice. In this scenario we are designing our own product. Currently we are building at a prototype level with no appreciable wait between reflow passes. The part in question is a 64 pin QFP. We use a BTU VIP 98 with edge conveyor.
Electronics Forum | Sat Apr 09 18:33:08 EDT 2005 | valuems
Hello If mr. Miller will go to the dos promp ( esc key ) and type in dir/w and then open the .000 file he will find the pass words. As far as the UP100 goes, god only knows. Forget finding this in the manuals. And I should add the .000 file is a su
Electronics Forum | Wed May 25 18:33:18 EDT 2005 | russ
We have passed testing using this process, I would consider it on a case by case basis however. We are very careful about the quantity of the O.A. that we use. The water soluble flux is gone after cleaning unless it was/could be encapsulated or tra
Electronics Forum | Mon Jul 04 09:01:22 EDT 2005 | Rob
Hi, I don't know if it will help but we talked about soldering Nickel on this thread: http://www.smtnet.com//forums/index.cfm?fuseaction=view_thread&CFApp=1&Thread_ID=8051Message31803 where we used Cobar solder paste for soldering all types of
Electronics Forum | Sun Jul 10 12:42:15 EDT 2005 | IMRANH
HI I am IMRAN i am not expart for it but i tell you one thing you cheak your PCB in microscompe may bee posibal you can see veary thin lear on the pcb pad. its come from pcb monufacturer whan they pass form chmical solution its lear may bee com. pl
Electronics Forum | Wed Jul 13 12:18:42 EDT 2005 | rlackey
Don't worry, your pretty safe now - we have a thing called VAT (a 17.5% purchase tax - ironically named Value Added Tax!) that funds the European Union to the tune of $Billions. They are usually too busy spending this on monumental lunch breaks in
Electronics Forum | Fri Jul 29 19:29:21 EDT 2005 | Jason Fullerton
Per Bob Willis, the UK based guru of all things lead-free: "The only thing those swabs do effectively is lighten your wallet." Really, they don't work reliably at all. You are better off trying to do it by visual inspection. I've tried out an XRF