John Barton wrote:
> 
> I was wondering does anyone know if there are any reliable alternatives to
>  fuming nitric acid for decapsulation of glob-tops on Chip-on-Board
> without damaging the wirebonds.
> John Barton
> _____________________________________________________________
> John Barton AKA JohnnyB
> NMRC, Lee Maltings,               Phone : +353-21-904082
> Prospect Row,                     Fax   : +353-21-270271
> Cork, Ireland.                    e-mail: [log in to unmask]
> "Whenever I'm faced with a difficult problem, I always think to
> myself 'How would MacGyver deal with this?'"
> ----------------------------------------------------------------
> ~
> ~
> 
> ***************************************************************************
> * TechNet mail list is provided as a service by IPC using SmartList v3.05 *
> ***************************************************************************
> * To subscribe/unsubscribe send a message <to: [log in to unmask]>   *
> * with <subject: subscribe/unsubscribe> and no text in the body.          *
> ***************************************************************************
> * If you are having a problem with the IPC TechNet forum please contact   *
> * Dmitriy Sklyar at 847-509-9700 ext. 311 or email at [log in to unmask]      *
> ***************************************************************************
You may try URESOLVE PLUS .I think that the manufacturer is Dynalloy,but 
Iam not sure.It may although damage any other organic materials too.
It doesn't attack metals.You must check the progress of the
decapsulation very often under a microscope.The process is much slower
than with nitric acid ,and easier to control.You dip your sample
in heated URESOLVE PLUS and check after1-2 minutes,and repeat...
Good luck,
Gaby

***************************************************************************
* TechNet mail list is provided as a service by IPC using SmartList v3.05 *
***************************************************************************
* To subscribe/unsubscribe send a message <to: [log in to unmask]>   *
* with <subject: subscribe/unsubscribe> and no text in the body.          *
***************************************************************************
* If you are having a problem with the IPC TechNet forum please contact   *
* Dmitriy Sklyar at 847-509-9700 ext. 311 or email at [log in to unmask]      *
***************************************************************************