Micro 2D bar code printed on Dye

While going through some old diodes I ran across a red 660nm "chip" (none canned) diode I had forgotten about. Apparently I was dissatisfied with it some time ago and mangled the housing pretty bad. For some reason I just decided to take a close look at the semiconductor with my eye loupe and to my surprise I noticed a very small 2D bar code. You can barely make it out in the area I have circled in the pics.




As you can see its only about 0.2mm square! Here is a crappy video also, you can make it out at around the 25-30sec mark. Gives a little better size reference as well.
YouTube - ‪CLIP0300.AVI‬‎

Sorry if its difficult to make out, shooting video that close by hand isn't easy.

Wondering if anyone else here has ever seen this before:thinking: I haven't seen it mentioned.

Never heard of a code there.
Someone was successful at decoding the micro QR codes on the back of diode cans awhile ago. I don't know if he ever determined what the numbers signified tho.

Looks like you got quite mad at that lil diode...

HaloBlu said:

Looks like you got quite mad at that lil diode...

Click to expand...

Yeah, I'm pretty sure this was from a lightscribe burner I bought a couple years ago or so when they were around $75. when I got home and began the harvest I wasn't too happy to find that the diode wasn't in a standard TO-18 (5.6mm) can.:scowl: