Try an adhesive.dot and cure Al Cash > ---------- > From: Eric Christison[SMTP:[log in to unmask]] > Reply To: TechNet E-Mail Forum.;Eric Christison > Sent: Monday, November 23, 1998 6:01 AM > To: [log in to unmask] > Subject: [TN] Accurately Positioning Components on PWBs > > We have a product in which we have to place an optical sensor on a PWB > very accurately wrt a set of > fixing holes for a lens. > > We have been reasonably successful in the past using BGA packaged devices. > However, for reasons that > are too boring to go into we have recently changed back to LCC packages. > It seems that the position of > LCC packaged device wanders a lot more during reflow than the BGA. Does > anyone have any suggestions > how the LCC can be fixed to the board during reflow to prevent it moving? > > > > Eric Christison > Mechanical Engineer > VLSI Vision Ltd > Aviation House > 31 Pinkhill > Edinburgh > EH12 7BF > > Tel: +44 (0) 131 539 8165 > Fax: +44 (0) 131 539 7141 > > ################################################################ > 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 ################################################################