In message <[log in to unmask]> Victor Li writes: > I have seen some SMT components laying on circuits on a sheet of plastic, > which can be folded and saves some space. I also heard that cellular phone > or camera uses this kind of circuit board due to the limited space available. > > My question is : how do they solder the components onto it? Normal > reflow? Would it go through the 200C without damage? What is the > material of it? Flexible circuits are big business. The orange coloured film is polyimide, which goes under the brand name of Kapton. It is a DuPont product. Components may be soldered on using conventional print and reflow, although tooling can be a bit tricky. The film stands up to the temperature pretty well - it's the same stuff used in high temperature wave solder masking tape. Peter -- ............................................................................... Peter Swanson Oxfordshire, England INTERTRONICS [log in to unmask] Compuserve: 100120,3641 http://ourworld.compuserve.com/homepages/Peter_Swanson Experience is what you get when you were expecting something else. ............................................................................... *************************************************************************** * TechNet mail list is provided as a service by IPC using SmartList v3.05 * *************************************************************************** * To unsubscribe from this list at any time, send a message to: * * [log in to unmask] with <subject: unsubscribe> and no text. * *************************************************************************** * If you are having a problem with the IPC TechNet forum please contact * * Dmitriy Sklyar at 847-509-9700 ext. 311 or email at [log in to unmask] * ***************************************************************************