[Darksheare]

Got lots of plastic packaged things out in the world today.

[null and void]

This is the black plastic the individual chips are packed in.

Quite a laundry list of requirements:

Opaque
Hard
Fast setting
Expansion matched to Silicon and Kovar
Free flowing enough to be molded around wires that are 0.001” diameter
Good adhesion to silicon, glass and metal
Cheap
Stiff
Able to accept marking inks

And probably half a dozen more I can’t think of off the top of my head.