Electronics Forum: cpu underfill remove (Page 4 of 6)

Why is NC the prefer process for BGA mounting? why not WS?

Electronics Forum | Tue Aug 21 08:44:48 EDT 2001 | caldon

A) The standoff height of some uBGA components does not allow water to penatrate under the component. B)Water soluable may dilute the flux and not remove it all together. This can be tested with Ion Chromatography. C) Water soluable in some cases ne

BGA Assembly

Electronics Forum | Thu May 30 07:28:15 EDT 2002 | jaltland

Ben, Thanks for the input on the apertures and thickness. The side two problem, is not reflow. We have no trouble with reflow. The problem is that our product is high precision crystal oscillators. In order to get the precision needed, we have t

Underfilled BGA Removal

Electronics Forum | Thu Mar 27 18:07:02 EDT 2014 | hegemon

If you are 100% sure that the solder has reflowed (time and temp based), then just use an wood stick to wedge the part upwards. It just takes a little bit of "lift". I used a wooden Q-Tip end that I trimmed to a wedge using an exacto blade. Wait f

Package rebake

Electronics Forum | Wed Jan 09 01:22:39 EST 2019 | kenneth0

Hi Simond, The baking process is likely to remove any moisture after the cleaning process. We wouldn't want any moisture trapped as this might cause delamination if the package is subject to subsequent heating/reflow process. Hence there's a staging

Shielding from Nearby Heat-Any Tricks

Electronics Forum | Wed Dec 24 11:49:46 EST 2008 | bandjwet

Put on your thinking caps for this one......We are trying to remove a BGA (10 x 10mm, plastic, 0.8mm pitch) which is approx 3 mm next to another BGA (5 x 5mm, plastic, 0.8mm pitch). The challenge is this second device is underfilled with a softening

Re: TCP solder / desolder / rework

Electronics Forum | Tue Jun 09 09:40:47 EDT 1998 | Wolfgang Hantz

| We offer an upgrade service for notebooks with 486 SX/DX CPUs up to 586-133 MHz using the AMD 5x86-133 MHz CPU in the PQFP package. We are pretty succesful with this service and until today we did more than 1000 notebook upgrades this way. | Now,

Re: Nice philosophy

Electronics Forum | Wed Jun 10 14:22:07 EDT 1998 | Chrys

| | We offer an upgrade service for notebooks with 486 SX/DX CPUs up to 586-133 MHz using the AMD 5x86-133 MHz CPU in the PQFP package. We are pretty succesful with this service and until today we did more than 1000 notebook upgrades this way. | | N

TpSys Rebooting MMi returned 134 -My Data 12-

Electronics Forum | Thu Feb 13 09:35:35 EST 2020 | jactomas

Since 6 days we are tryng to solve a issue in our MyData12. For some reason, the TpSys doesn´t start properly and continuesly is rebooting after a message "MMI exited, status = 134, terminating servers - Waiting for Tpsys to finish - MMI returned 13

Fuji CP6 24V Power Supply shorted at power up?

Electronics Forum | Wed Jul 12 17:05:22 EDT 2017 | rodrigo

Hi all, Our Fuji cp6 woke up with a bad power supply (ps) this morning. The ps is one of two 24vdc (Corsel P300E-24). There is one inside the cabinet and one on the door where the cpu card is. The bad one is the one inside the cabinet. So we had anot

Re: Passivation Issues

Electronics Forum | Thu Nov 19 16:24:23 EST 1998 | Earl Moon

| Hello Everybody | | I am new to the electronics packaging arena, please be patient with me... I have a few questions regarding the various passivation used on the silicon dice. I would really appreciate if you guys could provide me with more info


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