Resolder tower stacked TSOPs

[EvilStevil]

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!

[pepe]

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

pepe

[EvilStevil]

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 (16.59 KiB) Viewed 9352 times

[hddguy]

What device are these chips from?

[EvilStevil]

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

[pepe]

hmm, never seen such setup...

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

pepe