Does anyone have any process experience with Florida CirTech's Omikron immersion white tin finish they are willing to share? Bev Christian Nortel >---------- >From: Eddie Brunker[SMTP:[log in to unmask]] >Sent: Friday, October 24, 1997 1:41 PM >To: [log in to unmask] >Subject: [TN] ALTERNATIVE FINISH > >In a recent post I mentioned Alphalevel in among a list of surface finishes. >I have upset the people at Cookson and recieved a direct complaint. > >My reason for the comment was this. >The first features about Alphalevel came out in magazines a few years ago. I >was very excited by the prospect of this new product. Even now think it is >an exciting idea. >We get our boards from two suppliers. I went to the one with whom we had a >strong relationship at the time and asked if we could get them to look at >giving us this product in the future and if they could provide some samples >as soon as possible. This fabricator is working on an international stage >and supply to countries all over the world. They regularly contribute to >this NET. > >At this time a representative from the large UK supplier who planned on >fabricating boards with Alphalevel came to visit and we discussed the new >finish. They informed us that within a few weeks the process would be up and >running. > >Our trusted supplier said they would help us evaluate the process if we >really wanted to. They have a great deal of international experience and >understanding of the technologies available. They would have the boards >finished at another company in a differnt European country with whom they >had strong links. > >Our supplier pleaded with us to abandon any notion of a silver based finish >as their experience over the years had always shown problems with this type >of chemistry. > >Stories of black pads and unsolderability were the reason on the older or >other silver based technologies. We persisted and obtained samples of >Alphalevel. >If the process works, yes you have a good product. > >While we obtained samples from Europe, the Large UK company who introduced >Alphalevel were struggling to get their line running. There was a long delay >before Alphalevel boards were coming off the line. Talking to technical >staff in other companies at the time there were reports of BLACK PADS and >serious problems with the chemistry. >I gave up on this as a finish, but recently I was at a conference, and a >major design and assembly house here in the UK were privately complaining of >the problems with their Alphalevel as supplied by this UK fabricator. > >I'm sorry if I upset you Cookson, it was just a comment in a posting about a >different subject. We rely on Cookson for a good deal of other products. >Do people feel that negative comments about brand names shouldn't be made on >the Net? > >Thanks > >############################################################## >TechNet Mail List provided as a free service by IPC using LISTSERV 1.8c >############################################################## >To subscribe/unsubscribe, send a message to [log in to unmask] with following >text in the body: >To subscribe: SUBSCRIBE TECHNET <your full name> >To unsubscribe: SIGNOFF TECHNET >############################################################## >Please visit IPC web site (http://www.ipc.org/html/forum.htm) for additional >information. >For the technical support contact Dmitriy Sklyar at [log in to unmask] or >847-509-9700 ext.311 >############################################################## > ############################################################## TechNet Mail List provided as a free service by IPC using LISTSERV 1.8c ############################################################## To subscribe/unsubscribe, send a message to [log in to unmask] with following text in the body: To subscribe: SUBSCRIBE TECHNET <your full name> To unsubscribe: SIGNOFF TECHNET ############################################################## Please visit IPC web site (http://www.ipc.org/html/forum.htm) for additional information. For the technical support contact Dmitriy Sklyar at [log in to unmask] or 847-509-9700 ext.311 ##############################################################