Electronics Forum | Wed May 19 17:43:25 EDT 2010 | pforister
Hello, I'm having problems with voiding on an assembly that has a GPS hybrid with balls much like a BGA. This is a RoHS assembly using no-clean solder (Kester EM907). The voids are at or above 25%. I use an 8 zone oven where I peak in zone 7 and
Electronics Forum | Wed Sep 08 14:31:48 EDT 1999 | John Thorup
| | Hello: | | We are using a Heller 1500S reflow oven to solder surface mount parts. Just within the last two weeks, the larger I.C.'s are moving while going through the oven. The parts are checked for placement before putting into the oven.
Electronics Forum | Sat Nov 05 03:33:28 EST 2005 | grantp
Hi, I might not have been clear in my previous post on this, and the problem we saw is the hot metal of the oven walls caused IR transmission of heat into the board, and thats why the point in time from the start of the profile to the point the PCB
Electronics Forum | Sun Jun 10 12:30:10 EDT 2001 | procon
Is this a Convection Oven or IR? If convection, you can increase the air velocity in the zones if the oven has this ability. You should do as Dave has explained. If you must use pallets when reflowing your components, you need to profile in the same
Electronics Forum | Tue Oct 16 11:51:26 EDT 2001 | bobm
i am using the epibond. i had alpha come in and look at our set up. they told me that the epibond can be reflowed at regular temp profiles with no problems. because i only have one oven and two pick n place machines it was important to be able to run
Electronics Forum | Fri Mar 21 18:12:31 EST 2003 | Judy
I look at boards coming out of the oven top side and bottom If I take that board after its been glued on bottom side out of the oven and look at the top side when I pick up that board you should see the glue parts that fell off you really have to wa
Electronics Forum | Fri Dec 22 12:58:23 EST 2006 | MFG CAVEMAN
Simon, In a previous life, I came upon a maintenance tech that had an old vapor phase oven control cabinet half ripped apart for a main power problem. I asked him if he had checked to see if any of the E-Stop swtiches had been hit. One had been ac
Electronics Forum | Wed Nov 02 17:49:07 EST 2005 | grantp
Hi, We used a batch oven from Reddish Electronics out of the UK. It was convection, and ok, but had limitations. Batch convection ovens start to heat up, so the metal of the oven is hotter and hotter and it effects the profile. So we ended up need
Electronics Forum | Tue Oct 27 04:19:40 EST 1998 | Mark
| | | | What are the key feature to look for in buying a profiling product for Reflow ? | | | | | | Who's is the best and how much do these systems cost ? | | | | | | Thanks in advance. | | | | | | Hi Mark, | | | | I am currently the oven secto
Electronics Forum | Mon Mar 10 10:14:10 EST 2003 | pjc
Most pre-reflow AOI systems today can easily keep up with production line beat rates. Pre or Post reflow AOI is the difference between process control vs. defect screening, in my opinion. Pre reflow repairs cost much less than post. Pre AOI is for
