The actual parts are cheaper in SMD as well. Matt.
On Nov 2, 5:27 am, Oliver Seitz <[email protected]> wrote: > > SMD versions would be cheaper to manufacturer. > > That's true. I've once asked my PCB assembling company, and they told me how > PCBs are populated: > > 1. solder paste is applied to the top side for SMDs using a stencil > 2. top-side SMDs are placed in the paste > 3. top-side SMDs are soldered (infrared, hot-air or the like) > 4. bottom-side SMDs are glued in place without solder paste > 5. the glue is dried. This takes its time and therefore costs money > 6. top-side THTs are placed > 7. top-side THTs and bottom-side SMDs are soldered (possibly selective, wave > soldering or the like) > 8. bottom-side THTs are placed and soldered by hand. That's expensive, of > course. > > So, cheapest is SMD with parts on one side only. Next is THT only. Then come > mixed SMD and THT with all parts on one side. Then SMD on both sides plus THT > on top side only. The most expensive are PCBs with SMD and THT, both on both > sides. > > I'm not sure where to put "SMDs on both sides, no THTs" as it could well be > that no glue is necessary then. > > All of this only applies to automatically populated PCBs in perhaps 100 > pieces or more. For low quantities, THT might even be cheaper as no > solder-paste stencil has to be made. > > Greets, > Kiste -- You received this message because you are subscribed to the Google Groups "jallib" group. To post to this group, send email to [email protected]. To unsubscribe from this group, send email to [email protected]. For more options, visit this group at http://groups.google.com/group/jallib?hl=en.
