Electronics Forum | Thu Nov 03 07:43:52 EST 2005 | davef
Questions are: * Is the problem 'wire bonds that don't stick' or 'wire bonds that fall or break off later'? * What materials are you working with? * What is your working time after plasma clean? * What does surface analysis tell you about surface con
Electronics Forum | Thu Nov 03 21:40:40 EST 2005 | davef
There maybe multiple drivers to your problems. * First, decreasing bond quality with time indicates a plating issue. What's the actual thickness of your gold and nickel on the pads? * Second, the no-sticks indicate contamination. If it's organic, p
Electronics Forum | Thu Nov 11 10:55:32 EST 1999 | KenF
Hi, could anyone tell me the maximum size of an SMD ceramic capacitor that can be assembled on a copper based substrate reliably? The SMD will be reflowed on the copper substrate. The main concern is the CTE mismatch between the ceramic capacitor and
Electronics Forum | Thu Dec 02 09:20:33 EST 1999 | Dave Cunningham
Is there a typical alloy used by vendors on the substrate pad? What is their process used to attach a eutectic ball to that pad? Thanks.
Electronics Forum | Mon May 05 11:20:10 EDT 2014 | pankyb1261
Hi, I was wondering if there is a preferred source of the .635mm ceramic substrate specified in the J STD 002 Test S and if there is what is the typical size folks are using (3" x 3"?). Thanks, Rich
Electronics Forum | Thu Jan 26 02:14:52 EST 2017 | jgo
Hi all, Am new to SMT here. I have a very thin laminate substrate which around 120um thickess. Being that thin, warpage is constantly an issue for us. For the solder printing part, we have a number of problems. Being so thin and warped, we need t
Electronics Forum | Mon Jan 30 05:58:39 EST 2017 | rob
Hi all, > > Am new to SMT here. > > I have a very > thin laminate substrate which around 120um > thickess. Being that thin, warpage is constantly > an issue for us. > > For the solder printing part, > we have a number of problems. > > Being s
Electronics Forum | Mon Jan 30 15:32:14 EST 2017 | davef
so, why are your laminates warped? What needs to be done to correct that issue?
Electronics Forum | Mon Jan 30 19:29:50 EST 2017 | swag
Tacsil is another product you might try.
Electronics Forum | Sat Jul 28 04:17:47 EDT 2018 | blusmart
Thinking very well
