Raj, Visit www.rampinc.com and go to library resorces. You can serach abbreviations for PCB technology for OSP and ROSA. ----- Original Message ----- From: Rajkumar To: [log in to unmask] Sent: Tuesday, April 11, 2000 1:46 AM Subject: [TN] ROSA and OSP Hello Can anyone explain what this coating means and what is the difference between them? Thank you Regards Raj