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 Post subject: Resolder tower stacked TSOPs
PostPosted: January 22nd, 2010, 18:39 
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Joined: March 3rd, 2009, 15:39
Posts: 3
Location: Neither here nor there
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!


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 Post subject: Re: Resolder tower stacked TSOPs
PostPosted: January 23rd, 2010, 8:43 
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Joined: October 3rd, 2005, 0:40
Posts: 4334
Location: Hungary
I have seen stacked ICs many times, but there never was any PCB in between.
Could you post pics?

pepe

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 Post subject: Re: Resolder tower stacked TSOPs
PostPosted: January 25th, 2010, 10:59 
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Joined: March 3rd, 2009, 15:39
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Location: Neither here nor there
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.


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 Post subject: Re: Resolder tower stacked TSOPs
PostPosted: January 26th, 2010, 5:17 
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Joined: November 9th, 2006, 15:15
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What device are these chips from?


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 Post subject: Re: Resolder tower stacked TSOPs
PostPosted: January 26th, 2010, 17:18 
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Joined: March 3rd, 2009, 15:39
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These chips are from an SSD. The photo is not of the device, just an example I found. Exact same setup though.


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 Post subject: Re: Resolder tower stacked TSOPs
PostPosted: January 28th, 2010, 17:08 
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Joined: October 3rd, 2005, 0:40
Posts: 4334
Location: Hungary
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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