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Resolder tower stacked TSOPs
http://forum.hddguru.com/viewtopic.php?f=10&t=14609
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Author:  EvilStevil [ January 22nd, 2010, 18:39 ]
Post subject:  Resolder tower stacked TSOPs

Hello boys and girls! Any clue how to resolder stacked flash chips that have a thin pcb in between the pins? I need to put them back together, and back on the board. I put the first chip on the board, then blasted the chip with hot air and set the pcb on top with a tweezers, but the pcb spacer does not sit on the pins very well. I have a ton of these to resolder! YIKES! Any guesses?

Thanks!

Author:  pepe [ January 23rd, 2010, 8:43 ]
Post subject:  Re: Resolder tower stacked TSOPs

I have seen stacked ICs many times, but there never was any PCB in between.
Could you post pics?

pepe

Author:  EvilStevil [ January 25th, 2010, 10:59 ]
Post subject:  Re: Resolder tower stacked TSOPs

Here is an example. I have already pulled the chips apart on the one that I have. Proving to be quite difficult! I would normally bend the pins over on solder them directly to the bottom chip, but that won't fly with this customer.

Attachments:
icts_box_top_on.gif
icts_box_top_on.gif [ 16.59 KiB | Viewed 9351 times ]

Author:  hddguy [ January 26th, 2010, 5:17 ]
Post subject:  Re: Resolder tower stacked TSOPs

What device are these chips from?

Author:  EvilStevil [ January 26th, 2010, 17:18 ]
Post subject:  Re: Resolder tower stacked TSOPs

These chips are from an SSD. The photo is not of the device, just an example I found. Exact same setup though.

Author:  pepe [ January 28th, 2010, 17:08 ]
Post subject:  Re: Resolder tower stacked TSOPs

hmm, never seen such setup...

I have no good idea to resolder tons of this. probably infrared can help here...

pepe

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