Is that black material made of silicon? What about the red, green, yellow material? What about the blue material?


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    \$\begingroup\$ The colors you see on the top of the die itself aren't really there -- they are the result of light diffracting off the fine patterns of metal printed on the die, just like the rainbow you see on a CD or DVD. \$\endgroup\$
    – Dave Tweed
    Commented Oct 11, 2018 at 22:25
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    \$\begingroup\$ please provide link to the source of the image \$\endgroup\$ Commented Oct 11, 2018 at 22:48

1 Answer 1


The black/bluish rectangle in the middle is the silicon die, and the IC's circuitry is visible as the pattern on the top. Moving outward, the colors in the 'well' surrounding the die may be oxidation on an adhesive layer that 'glues' the die to the plastic IC body or a metal chip carrier. These colors are pretty, but have no function. A metal chip carrier serves to support the chip, and provide a path for heat to be removed from the chip. Next, you can see very fine bonding wires that connect the die to metal paths (not easily visible here) that eventually emerge from the plastic chip body as pins. Illustration below from http://eee-books01.blogspot.com/2015/07/construction-of-dip-ic.html... enter image description here


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