Does anyone have a working process utilizing peelable soldermask to 
     protect gold plated contacts during the hot air solder leveling?
     
     We are a service shop and offer horizontal HASL as one of our 
     services. We currently use a HASL tape to protect the gold plate, but 
     we have come across a high voulme part number that has a routed slot 
     in the middle of the connector array.  The slot extends past the 
     contacts and thus leaves a route for the solder to get under the tape. 
      This causes the tape to leak and solder to come in contact with the 
     gold plate causing a scrap defect.
     
     I have tried sreenable soldermask in the past with some success.  I 
     was never able to keep the registration tight enough to work on a part 
     such as this.
     
     Any suggestions or leads to resources would be greatly appreciated.
     
     
     Michael Holan
     Process Engineer
     Radian International
     Electronics Div.
     
     internet: [log in to unmask]
     phone: 512/310-4209
     fax: 512/388-0898

***************************************************************************
* TechNet mail list is provided as a service by IPC using SmartList v3.05 *
***************************************************************************
* To unsubscribe from this list at any time, send a message to:           *
* [log in to unmask] with <subject: unsubscribe> and no text.        *
***************************************************************************