You learn something new (or new to you) every day. I was just told of a board finishing process called Hot Oil Solder Levelling. It was portrayed as a very flat, nice finish. I was also told that it is old technology, which may be why I am not familiar with it. It is only within the last year that I have really gotten involved with specifying board finishes. I've been searching on the internet to learn more and am a bit confused. My questions: Is Hot Oil Reflow and Hot Oil Surface Levelling the same thing? If not, what is the difference? What are advantages/disadvantages to this over HASL, or any of the newer so-called 'flat' finishes needed for fine pitch? Thanks. Genny Gibbard (mailto:[log in to unmask]) --------------------------------------------------------------------------------- Technet Mail List provided as a free service by IPC using LISTSERV 1.8d To unsubscribe, send a message to [log in to unmask] with following text in the BODY (NOT the subject field): SIGNOFF Technet To temporarily halt delivery of Technet send the following message: SET Technet NOMAIL Search previous postings at: www.ipc.org > On-Line Resources & Databases > E-mail Archives Please visit IPC web site (http://www.ipc.org/html/forum.htm) for additional information, or contact Keach Sasamori at [log in to unmask] or 847-509-9700 ext.5315 ---------------------------------------------------------------------------------