Electronics Forum | Thu Apr 12 17:34:05 EDT 2007 | carsan
We are running RoHS compliant & non RoHS compliant assemblies. We buy our bare boards from one supplier that only manufactures RoHS compliant boards using a Sn100 finish. Is there any known issues running leaded solder on a Tin finish? Does normal
Electronics Forum | Sat Apr 21 12:06:43 EDT 2007 | Cmiller
I coated three other bare boards on one side this morning from two different suppliers. Two of them had exceptional adhesion and one was so-so. I ran them through the reflow oven, coated them and got the same results on the other side, so it does not
Electronics Forum | Mon Apr 23 11:55:54 EDT 2007 | Sundaram kumaravelu
Hello, Does any one know of an IPC standard for mechanical hardware. For eg we had connectors from our supplier which had 4 or more radial splits in screw mounting flange and the plating finish was not uniform on many of them. I am trying to get inf
Electronics Forum | Thu May 10 08:09:52 EDT 2007 | davef
There is no standard for time above liquidus. It is described rather broadly by the solder paste supplier. Reflow Zone: If the temperature is too high, boards may char or burn. If the temperature is too low, cold and grainy solder joints will resul
Electronics Forum | Wed Sep 05 10:36:47 EDT 2007 | dwanzek
Hope you found an adhesive that works for you Dback. Thought I felt sharp pain in my back for awhile as did not follow up on this string. Then again, a response may prolong the pain, oh well figured a need for accurate information. FYI for RealHuss
Electronics Forum | Fri Aug 03 14:44:36 EDT 2007 | rpadilla
Depends on the manufacturer of the paste... Rosin-based-flux solder paste usually takes 12-24hr's to fully oxidize with open containers. Water-based flux usually is 3-12hr's, but some have a 24hr open container shelf life... However, uncertain unt
Electronics Forum | Wed Sep 05 08:06:08 EDT 2007 | davef
The gold needs to go into the solder so the solder can form a connection between the the component and the nickel under the gold. The gold will disperse into the solder. Most of it will remain in your solder pot after board processing. Assess the c
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 | Thu Oct 04 09:21:35 EDT 2007 | dj_jago
We use copper grease on the bolts of our wave solder machines solder pot. The working temperature is up to 1000degC. I believe that the boiling point of mineral oil is a little over 300degC and you will exceed this with iron temperatures, especially
Electronics Forum | Mon Oct 22 21:34:36 EDT 2007 | davef
Double check on this, but we have this little voice in our heads telling us that your AgPd termination is intended for conductive adhesive applications. Check with your component supplier. We recall a thread on SMTnet [ http://www.smtnet.com/forums
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