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Why is COB cheaper than soldering?
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1
Oct 11.2019, 17:25:10
In cheap electronics like calculators various chips are attached to the board using COB techniques instead of soldering. It is often said that this is done because COB is "cheap". And how much cheaper it is, in practice?
Soldering seems like a very cheap thing to do, and many other parts on these boards are soldered anyway (capacitors, resistors, mechanical parts), so you cannot really avoid a soldering pass. Why is it then COB used?
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A****min
Oct 15.2019, 17:15:58
The encapsulation for an IC is not free. Nor is the wire bonding. So they do it through the assembler at a cheaper cost
