Electronics Forum: solder paste open (Page 1 of 724)

QFP IC open solder

Electronics Forum | Tue Sep 24 12:58:27 EDT 2002 | dragonslayr

Although focusing on solderability may be the right answer, I wonder if you are satisfied that co-planarity is not the root cause. With random events of contact opens, this may be the case. Cleanliness of the stencil can also be a source of your pr

QFP IC open solder

Electronics Forum | Mon Sep 23 22:31:48 EDT 2002 | davef

Comments are: * It�s interesting, but not surprising that your time above liquidous varies around the sides of this component. * You are correct in thinking that it is better to reduce than to increase the temperature differences around the component

Re: BGA open

Electronics Forum | Thu Sep 02 21:19:25 EDT 1999 | NAZEEH CHAUDRY

| | Could someone shares their experience on the causes of 'Open' in the BGA after reflow. | | | | | Insufficient solderpaste. "No flux" (sat too long after print). | | Those are what I've experienced. | cbga or pbga if pbga check thermal prof

BGA open joint

Electronics Forum | Wed Aug 04 20:06:24 EDT 2004 | C.W

Customer returned a brd claim that one of the FPGA is having "cold solder joint". I inspected the the BGA location with X-ray and Ersascope, balls' shape look fine, voids are not detected, perimeter joints show shinny and smooth appearance, i have se

Re: BGA open pin

Electronics Forum | Sun Feb 13 01:35:55 EST 2000 | Dean

Without further information my first guess would be lack of flux to "cut through" the ENTEK layer. Question: In X-ray is the suspect ball of equal diameter when compared to adjacent balls? If no then the volume of solder is different which would po

QFP IC open solder

Electronics Forum | Sat Sep 21 23:38:06 EDT 2002 | ivanchu

I got one problem from my production line recently. One 0.5mm pitch QFP IC have been used on my PCBA. Actually, the defect was happened in randomly. Sometime, we got the fillet completely but sometime is not. The solder joint look like is good, but t

QFP IC open solder

Electronics Forum | Sun Sep 22 09:36:04 EDT 2002 | davef

Sometimes the cut end of QFP leads have corrosion that is very difficult to solder. If this is what you're talking about, it is not a defect according A-610C, 6.5.2, Exposed Basis Metal

QFP IC open solder

Electronics Forum | Tue Sep 24 07:42:36 EDT 2002 | Yannick

Hi, In your message ou talk about the QFP toe, we have some problems with that in our facilitie, Do you have some ideas to solve thise kind of problem? Thank You Yannick

QFP IC open solder

Electronics Forum | Sat Sep 28 05:30:44 EDT 2002 | ivanchu

Stencil cleaning process is taking by machine every 15 boards. We are using wet, vaccune, Dry, Dry cleaning process. The aperture of the stencil is fullfil the aspect ratio.

QFP IC open solder

Electronics Forum | Mon Sep 23 03:12:01 EDT 2002 | surachai

We encounter this problem also , I know that it 's acceptable per IPC standard but sometime it fail at ICT and FCT , then this problem should be prevent , we found it with QFP 16 mil pitch and the defect looklike negative wetting at the front of lead

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