Howdy, I understand that the paste height of one mil or more above the stencil thickness is quite common. Controlling the paste height is a good way to monitor screen printing process. However, it's imperative to review the correlation between your defect data vs paste height to determine your SPC target. Keep in mind that the following factors can also affect the screen printing process yield: - board warp** - aperture design - board support** - printing parameters (Snap off)** - solder mask** - surface finish** - squeegee type** - print locations** - footprint design - stencil thickness** etc.... Note: ** affect Paste height Hope this helps Michael Yuen *************************************************************************** * 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. * ***************************************************************************