Comment Been around for a while... (Score 1) 25
These have been around for ages. I started working in semiconductor layout circa 1993. General Instrument was one player who had tons of these "doodles". Rumor was that it was so they could see which chips people were inspecting (for cracking) by the mention of the doodles.
I/we (my team) at my company used to put them on chips until one bozo (hello Kurt...) put an lvsmask tag on his doodle which cause the LVS tool (layout vs. schematic) verification tool to ignore his doodle which was shorting the power and ground rails on the chip. After that fiasco, we were told "no more of that"