SN100CL Minimum Thickness Guidelines
Currently, there are no set requirements for minimum lead free solder finish requirements. Many companies who have run this solder coating process in the tin-lead version know that thickness varies dramatically based on pad size. Furthermore, minimum coating thickness is more critical to the solderability of SN100CL more than it is to standard tin-lead finish. Combining these two facts, it is all the more important to create a new standard by pad area.
Pb-Free Minimum Thickness Coupon
After studying literally thousands of panels and the subsequent solderability results, Saturn Electronics Corporation has established a coupon and general guidelines for this finish. Having this coupon on the actual board / array removes the variation in acceptability measurements between the supplier and the customer by standardizing not only the location of the measurement, but also the thickness by applicable pad geometry.
Also, customers can request a gerber format of this coupon to insert into the waste area of their PCB boards. Additionally, Saturn will send the suggested minimum thickness requirements resulting from the study.
For more information on Saturn's Lead-Free HASL and Laminates for PCBs visit the SN100CL Minimum Thickness Guidelines page as well as the IPC Lead Free Material Specification Sheets in the Suggested Fab Notes section of our RoHS / Lead Free Resource Center.
If you have any further inquiries, contact Saturn Electronics Corporation, Bare Printed Circuit Board Manufacturing firm, to speak with an engineer regarding any further technical matters.
Saturn Electronics Corporation is a Minority Owned Business Enterprise and proud member of the Michigan Minority Business Development Council (MMBDC)
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