For HASL finish, the most common problem you see is the unevenness of the fiducial. The reduction in fiducial size should improve the situation. (0.04" Round metal Pad with 0.1" Mask free area) ---------- From: TechNet-request To: TechNet Subject: polishing fiducials Date: Wednesday, November 13, 1996 9:05AM Interesting discussion on using rubber erasers to "polish" fiducials..... I presently have a customer who has to polish his fiducials in a similar manner before his vision system can locate our boards. I want to try and help this customer get out of this practice. The board has a HASL finish. Can anyone shed any light as to the root cause of this issue and reccomend solutions (preferrably board related fixes - if there are any). I have also read in the forum that gray scale vision systems can remedy this. *************************************************************************** * 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. * *************************************************************************** *************************************************************************** * 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. * ***************************************************************************