A 10:1 ratio for LPI mask versus thermal cure mask is certainly very steep and seems to me a little excessive. It is true that LPI masks cost more and that the processing is more complicated. On the other hand, there tends to be less rework with LPI masks and you should not have "mask on pads" type problems. I would think that a 3:1 ratio would be about as bad as you should ever expect. Larry Fisher Dexter Electronic Materials *************************************************************************** * 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. * *************************************************************************** * 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] * ***************************************************************************