Kelly, Of course, CCI manufactures boards using Omikron as a surface finish too. In order to defray an onslaught of anti-sales comments, I believe we make the better boards, but there are 40 shops or so around who can put on the finish. Contact Stephen Wentz of Florida CirTech -- [log in to unmask] -- for a manufacturer list or come to us. Regards, Paul Wilson R&D Manager / Plant Chemist Circuit Center, Inc. 4738 Gateway Circle Dayton, OH 45440 Phone (937) 435-2131 Fax (937) 435-7698 http://www.circuitcenter.com -----Original Message----- From: Keith Larson [SMTP:[log in to unmask]] Sent: Thursday, January 07, 1999 3:01 PM To: [log in to unmask] Subject: Re: [TN] immersion white tin finish Hi Kelly, I know of two manufacturers off hand. Data Circuit Systems (small shop, low to med tech, low to med volume, some QTA) and Power Circuits (med size fabricator, high tech including microvias, QTA protos through QTA production) both have the Omikron White Tin in house. Best regards, Keith Larson KELLY M SCHRIVER wrote: > Hi All - > > We are in the process of evaluating alternates to HASL for surface mount > boards. Most of our designs are targeted for severe operating environments, > including military. This evaluation includes the Omikron White Tin. It is > premature to say very much, other than the white tin seems to be the only one > of the several finishes, other than HASL, which retains full solderability > thru storage and multiple solder/cleaning process cycles. Evaluation has not > yet reached the point of limited production and no product has yet been > subjected to ESS and beyond. > > I would make the following observations: This finish is very flat and uniform, > free of the crowns which sometimes add to the problems of fine pitch and BGA > assembly. It is also lead free, for the point in time that we are faced with > that issue. > > The only shortcoming to date is that a very limited number of board > fabricators have the process up and running. > Regards - Kelly > > ################################################################ > TechNet E-Mail Forum 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's web site (http://www.ipc.org) "On-Line Services" section for additional information. > For technical support contact Hugo Scaramuzza at [log in to unmask] or 847-509-9700 ext.312 > ################################################################ << File: vcard.vcf >> ################################################################ TechNet E-Mail Forum 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's web site (http://www.ipc.org) "On-Line Services" section for additional information. For technical support contact Hugo Scaramuzza at [log in to unmask] or 847-509-9700 ext.312 ################################################################