Raw Silicon Chip (Die)

A Raw Silicon Chip (DIE) , as found prior to lead attachment and encapsulation.    

This is purely a curiosity / educational item rarely found outside the factory.    

looks very impressive under a microscope.    

comes with datasheet showing die layout, which can actually bee seen on the chip without a microscope.    

actual die is an APEX CPA28  op-amp. these dies's probably would be used as component of a dedicated hybrid device  i.e a much larger circuit built up of many chips built into a single package..  

price is per single chip, (box shows 49 chips)  each chip is approximately 5 x 4.5mm