Hello, Everyone, Now we have met one problem in process that we found there are fiducially mark missing in final QC. while we didn't find undercut by microsection. Some guy have advised there maybe caused by rework in HASL, is it reasonable and why? can anybody help me? George Chu Quality Dept. Phone: ++86 512 5651961 ext.6201 Fax: ++86 512 5613446 Email: [log in to unmask]