Re: question 1. The clamping of the screw/washer will provide sufficient surface adhesion to prevent oxidation and fretting. The solder paste would for m a drop and prvevnt a surface clamp. It would be a tangental contact. Not desirable. Re: Question 2. As long as the hole dimension is consistent with the connector manufacturers specification, a gas tight connection will be made. A couple of years using Entek has not produced problems. > -----Original Message----- > From: Ken Patel [SMTP:[log in to unmask]] > Sent: Tuesday, December 15, 1998 4:29 PM > To: [log in to unmask] > Subject: [TN] Urgent: Entek Coated PCB processing at assembly house > > Hello Technetters, > I have couple of questions for Entek coated boards I am running on sample > basis. > (1) Do I need to apply solder paste on mounting holes of Entek coated > boards? These mounting holes will be used to fasten the board in a > chassis. Give me your pros and cons. > (2) The boards do have press fit connectors. Do you think I will be OK > with the Entek coating as connectors now will be making a contact > with copper which will get oxidized. Any long term problem from > reliability point of view. Can anyone suggest any test to find any > long-term reliability problem because of press-fit connector going > onto the bare copper? > > re, > Ken Patel > > > ______________________________________________________ > Ken Patel Phone: (408) 490-6804 > 1708 McCarthy Blvd. Fax: (408) 490-6859 > Milpitas, CA 95035 Beeper: (888) 769-1808 > > ################################################################ > 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 > ################################################################ ################################################################ 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 ################################################################