Electronics Forum | Tue Nov 27 20:51:18 EST 2007 | chs
Anyone can share experience on package crack for QFN package. This package is so sensitive to any external force. Any good recomendation on desoldering / rework procedure.
Electronics Forum | Sun Dec 02 20:02:23 EST 2007 | chs
Hi, There are QFN 32,40,48 pins with middle pad. Body size are 7x7 and pitch 0.5mm. I means as compared to 2 sided package, QFN are easily damaged by external mechanical / thermal force. Phenomenon observed are mold cap open which further caused wire
Electronics Forum | Fri Nov 30 19:39:51 EST 2007 | mika
Hi chs, What type of QFN or MLF package are we talking about? Assuming there is a middle thermal pad? Body Size & no. of terminals & pitch? What about your statement: "This package is so sensitive to any external force". Can you please explain what y
Electronics Forum | Wed Nov 28 20:03:36 EST 2007 | chs
Hi, Thanks for the info. You mentioned about TQFP, how about QFN, which is leadless and one sided package compared to TQFP ? Actually, we are component manufacturer. Recently we have multiple customer come back with issue of electrical failure on par
Electronics Forum | Wed Nov 28 16:08:38 EST 2007 | jmelson
I've been using Xilinx TQFP's in the 44 and 144 lead sizes with no trouble. I don't even bake them before reflow and have never had any problem. The Xilinx parts are certainly NOT sensitive, I could not break one with my bare hands if I tried (I ha
Electronics Forum | Thu Nov 29 16:00:03 EST 2007 | jmelson
Desoldering often applies a LOT more heat and thermal stress to the part, and maybe mechanical forces while everything is hot, to get the part free of the board. So, a lot of damage might be done there, making post-mortem harder. Without the leads,
Electronics Forum | Thu Sep 24 18:57:03 EDT 2009 | davef
From "siliconfareast.com": Basic Die Cracking FA Flow 1) Failure Information/Device and Lot History Review. Understand the customer's description of the failure, i.e., the failure mode, where it was encountered, what conditions the sample was subject
Electronics Forum | Fri Aug 26 19:59:02 EDT 2016 | mhanrahan
We've just purchased a CP45FV Neo to replace an ancient Panasonic line. First non-Panasonic placement equipment I've worked on, so learning as I go here. So far it's been pretty straightforward. However, we use some parts that come in QFN or LCC p
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