Electronics Forum | Thu Mar 31 06:09:19 EST 2005 | amstech
Yes, components do contribute to the non wets in fine pitch reflow. Oxidation is the main culprit. May ask where it is coming from. Can not say in particular. May be burn in test process or end of line baking, hot / cold testing and need to run DOE'
Electronics Forum | Sat Oct 18 20:39:40 EDT 2008 | arosario
thanks a lot... this a lot list.. bong
Electronics Forum | Fri Feb 12 09:21:43 EST 2010 | petep
How are companies handling lot tracking of parts, down to the serial number of the PCBA on which each component is being placed? We have customers who are needing information on Mfg. Lot numbers on mission critical product in the event of Manufact
Electronics Forum | Fri Feb 11 05:44:08 EST 2000 | Dean
Sounds like black pad to me. I just suffered this last week. Track your fab lot codes. Just in case. I processed 1000 fabs of 2 lot codes through 1 line (also WS609). 1 lot code failed with black pad the other did not. With one common mfg. proc
Electronics Forum | Tue Jul 02 16:04:08 EDT 2002 | russ
We normally disregard what the "tech" sheets say. A lot of it has to do with your printer settings, prints per hour, placement time, stencil cleaning procedures etc... Just another wrench to throw in, We have noticed lot to lot paste differences al
Electronics Forum | Mon Dec 02 16:55:49 EST 2002 | steve
On a lot of Loctite products there is a shelf life stated via a lot number on the bottle. It has been my experience as a distributor that Loctite will in most instances re-certify a product for an extended period of time, sometimes up to a year based
Electronics Forum | Thu Sep 20 13:06:37 EDT 2007 | hussman
Acualy same supplier, but they have 7 different facilities. Changes in prepreg thickness from lot to lot is the big deal, since internal shorting occurs form time to time. Just wondering if there was a spec I could use to force them to use the same
Electronics Forum | Wed Apr 29 10:05:05 EDT 2009 | wavemasterlarry
you have to lots of paste. one makes balls, one doesnt. Then why bake parts to over come bad paste? Sounds like the paste maker mixed the formula wrong on the one lot of paste. I used to work at a paste place and a lot of hand mixing is done at t
Electronics Forum | Sat Oct 20 10:06:36 EDT 2012 | surajdn
ok!... thanks a lot... Got some idea.... the resources are really great... thanks a lot! I couldn't find that book though. But there are some books that are on the net but not available in India(where I live). Thanks a lot to all of you. If you fin
Electronics Forum | Sat Feb 23 14:49:11 EST 2013 | duso02
Too bad you couldn't make it to the APEX show. Lots of equipment, and coating experts on hand. To answer your questions: 1. Yes, multiple brands, as well as non-UV cure. 2. Yes, there are. What you choose really depends on a lot of other info. 3. Ye
