wedge voids are usually a start of shotty drilling - then seepage of solution
through the voids and that solution then starts attacking oxide layer - which
inturn leads to pinkring. Dm will not make a difference - actually if
drilling is still primary cause - will be the same or worse - since Dm is
thinner coating. A reduced oxide layer can eliviate problem to a certain
degree - but then - reduced oxide brings in a problem of it's own.

regards

Richard Fudalewski

Atotech Canada

***************************************************************************
* 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]      *
***************************************************************************