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black thing on chips

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samcheetah

New Member
in most of the electronics products there is a black blob on the main chip. i have seen this black blob on handheld games and even on the LSI chip of a multimeter.

my question is that what is the use of this black blob. is it the same as the heat spreader of a microprocessor. and why is it black.
 

kinjalgp

Active Member
It is called "Chip On Board" or "COB" or "SoC" (System on Chip). It is a custom designed IC directly fabricated on to the PCB and the black thing protects silicon wafer from getting damaged. Black thing is a type of plastic. Actually I forgot its name.
 
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