Steve, The thermal path between PCB I/O's etc would be very poor. The temperature sensitive part of the device are not electrically connected to the rest of the device. Therefore I think air temperature above the board would the most important factor in the problem. Regards, > Eric, > > Wouldn't the temperature which your parts experience also be a function > of > the thermal path of the device's leads - eg - thick robust copper leads > (TO-220 like) conducting more heat than thin small leads? > > Steve Creswick > > -----Original Message----- > From: Eric Christison [mailto:[log in to unmask]] > Sent: Wednesday, September 26, 2001 8:38 AM > To: [log in to unmask] > Subject: [TN] Wave soldering Questions > > > I've got a question on wave soldering. > > We have a temperature sensitive component that we need to connect to a > PCB. > We know the component won't survive reflow temperatures but we could > redesign the package so that it is suitable for wave soldering. The > temperature sensitive part of the device is several mm above the PCB. > > What sort of temperature profile could one expect say 5mm above the PCB? > > Is wave soldering a technique which is still in common use or would > finding > a wavesoldering subcontractor or equipment be like looking for someone > to > service my Model 'T' Ford? > > Are there (or will there be) any issues about wave soldering with lead > free > solder? > > Regards, > > > > > Eric Christison > Mechanical Engineer > STMicrolectronics > 33 Pinkhill > Edinburgh > EH12 7BF UK > > Tel 44 (0) 131 336 6165 > Fax 44 (0) 131 336 6001 Eric Christison --------------------------------------------------------------------------------- Technet Mail List provided as a free service by IPC using LISTSERV 1.8d 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 delivery of Technet send the following message: SET Technet NOMAIL Search previous postings at: www.ipc.org > On-Line Resources & Databases > E-mail Archives Please visit IPC web site (http://www.ipc.org/html/forum.htm) for additional information, or contact Keach Sasamori at [log in to unmask] or 847-509-9700 ext.5315 ---------------------------------------------------------------------------------