Hello Alvin, Lots of good info about HASL can be found via my website at http://www.smtinfo.net Just click on the link named "HASL". Best Regards, Daan Terstegge PCB Assembly Department Thales Land&Joint Systems Tel: +31(0)35 524 8297 Fax: +31(0)35 524 8181 Unclassified Email >>> [log in to unmask] 01/06/05 02:06am >>> hi, the full title of this msg is: "HASL (hot air solder levelling) solder thickness impact on solderability with SnPb and Pb-free solder" i am currently in my 3rd year in a local university in singapore. the above named issue is a project that i am supposed to do. due to my lack of knowledge in this field, i would like to seek the opinions, advice or help from the people with expertise here. the project objectives are as follows: 1) To study the extent of inter-metallic layer on thin HASL coating thickness and the influence on assembly solderability. 2) To study any implication of lead free HASL as a surface finishing 3) To compare solderability of thick and thin HASL solder thickness with both SnPb and PB free solder i would appreciate any facts, info or links to relevant articles/reports/journals/magazines pertaining to my scope of the project. many thanks! regards, alvin --------------------------------------------------- Technet Mail List provided as a service by IPC using LISTSERV 1.8e 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 or (re-start) delivery of Technet send e-mail to [log in to unmask]: SET Technet NOMAIL or (MAIL) To receive ONE mailing per day of all the posts: send e-mail to [log in to unmask]: SET Technet Digest Search the archives of previous posts at: http://listserv.ipc.org/archives Please visit IPC web site http://www.ipc.org/contentpage.asp?Pageid=4.3.16 for additional information, or contact Keach Sasamori at [log in to unmask] or 847-615-7100 ext.2815 ----------------------------------------------------- --------------------------------------------------- Technet Mail List provided as a service by IPC using LISTSERV 1.8e 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 or (re-start) delivery of Technet send e-mail to [log in to unmask]: SET Technet NOMAIL or (MAIL) To receive ONE mailing per day of all the posts: send e-mail to [log in to unmask]: SET Technet Digest Search the archives of previous posts at: http://listserv.ipc.org/archives Please visit IPC web site http://www.ipc.org/contentpage.asp?Pageid=4.3.16 for additional information, or contact Keach Sasamori at [log in to unmask] or 847-615-7100 ext.2815 -----------------------------------------------------