Electronics Forum | Tue Feb 25 17:21:09 EST 2003 | slthomas
http://www.fda.gov/cdrh/devadvice/32.html is another good basic read. One of the meatiest things to come out of the '96 release of the QSR (Quality Systems Regulations) was more emphasis on design as a contributor to quality. It's nice to have the '
Electronics Forum | Fri Feb 28 13:11:55 EST 2003 | russ
one more thing, have you checked out the ability to just hand solder by drag technique? This can be the fastest easiest way sometimes. Russ
Electronics Forum | Mon Mar 10 15:10:49 EST 2003 | MA/NY DDave
Hi First of ALL, Thanks. I am first coming into this from the outgoing inspection or customer receiving inspection side of things.
Electronics Forum | Fri Apr 04 10:02:20 EST 2003 | rdr
Do you reflow both sides of the boards before washing? Sometimes these white residues occur from "burnt" flux. we see this from time to time especially when using hot air and liquid flux. Russ
Electronics Forum | Thu Apr 24 09:27:56 EDT 2003 | jgregory
What I meant is the gray rubber seals, top and bottom, that are pliable to allow the SS nozzle to slip back out and still provide sealing, deform too much and "squish" out to the sides. Jason
Electronics Forum | Mon May 05 03:53:41 EDT 2003 | praveen
Do not 'ON" the nitrogen during reflow. If the pad of the chip is bigger then reduce the pad width from out side. Reduce the ramp rate at any point of the profile below 1 deg c/sec.
Electronics Forum | Mon May 05 03:53:47 EDT 2003 | praveen
Do not 'ON" the nitrogen during reflow. If the pad of the chip is bigger then reduce the pad width from out side. Reduce the ramp rate at any point of the profile below 1 deg c/sec.
Electronics Forum | Mon May 19 02:36:25 EDT 2003 | Thomas
Hi Grant, From what I know, it has something to do with the flux...Imagine if the temp difference of the flux is somehow slowed down..it would reduce the tendency of a stronger pull on one side of the pad...
Electronics Forum | Thu May 29 14:27:04 EDT 2003 | larryk
This flex is .001" Kapton polyimide. The flex portion of this rigid flex consists of 3 layers of 1 oz copper with 5 layers of Kapton. Part of the flex is sandwiched in standard FR4 with two layer of copper on each side for a finished thickness of .
Electronics Forum | Tue Jun 17 15:52:51 EDT 2003 | russ
Is this a single sided or double sided board? We run the first side flat on the oven belt this keeps the board flat for the second side assembly. If the board warps during the second reflow process we will make a support fixture to carry the PCBA