Electronics Forum | Thu May 30 07:28:15 EDT 2002 | jaltland
Ben, Thanks for the input on the apertures and thickness. The side two problem, is not reflow. We have no trouble with reflow. The problem is that our product is high precision crystal oscillators. In order to get the precision needed, we have t
Electronics Forum | Tue Aug 03 16:52:41 EDT 2004 | Dreamsniper
Hi, What contributes to the above? I've got some BGA solder joints with a crystal like flux attached to it like a mini solder ball but do not have a perfect round shape. I had my aqueous cleaner's DI water sent for analysis and everything looks okay
Electronics Forum | Fri Feb 01 02:46:23 EST 2008 | bartlozie
Hello, If I do understand it correct, the dust in your oven are salt-crystals, comming from No-clean fluxes. We had them also once, it was a problem with one fan in the oven, I think you should check your fans inside the oven. Our extraction was OK,
Electronics Forum | Tue Jul 06 09:22:52 EDT 2010 | rgduval
Sean, We suggest having the PCB tested for ionic cleanliness. It is conceivable that though the visible flux residue has been cleaned, there is still invisible, yet ionically significant residue in the area of the board/part. We also suggest ensur
Electronics Forum | Wed Mar 01 16:55:55 EST 2000 | Dave F
Eldon: From you description, I think 3M makes the stuff you�re talking about. They can give you a source to kiss-cut it to your requirements. Good luck. Dave F
Electronics Forum | Sun Jan 21 16:42:35 EST 2001 | davef
I just can not get over the size of these crystals. What is the chronology of and the span of the thermal cycles this BGA has seen.[Just guess at the fabrication cycles, if it's difficult to determine]
Electronics Forum | Wed Mar 01 16:55:55 EST 2000 | Dave F
Eldon: From you description, I think 3M makes the stuff you�re talking about. They can give you a source to kiss-cut it to your requirements. Good luck. Dave F
Electronics Forum | Thu Jan 20 08:31:02 EST 2000 | Chad Notebaert
Armin: Are you washing the brds after wave? If so there are water soluble spacers out there that work great and are removed through the washing process!
Electronics Forum | Thu Jan 20 09:36:01 EST 2000 | John Thorup
a good source for spacers of all kinds, including the wash aways, is Bivar in California @ 714/951-8808 John Thorup
Electronics Forum | Wed Sep 04 15:04:53 EDT 2002 | melo_guy
You said that you were sole sourced. Are you in need of a second source for crystals or oscillators? My company manufactures these components. send me an e-mail if you are interested.
