Unique ID/SN on each IC

[ls00722]

Hi :
Assume I am designing an IC that will be in mass production, each chip will have a unique 32 bits ID. Apparently that has to be done by manuafacture, how will this be considered in RTL design phase? and how the manufacture will do it?
I only got experience on modeling an ROM, using case statement in Verilog. But since this will be an unique # for each chip. It can't be modeled using Verilog, so how do i incorporate this into my other logics in Verilog?
I am sorry if this is wrong place to post,and appreciate if you can direct me to the correct forum.

many Thanks!

chris

 

[RBB]

You'll need some sort of NVM (eeprom, flash or OTP)

 

[ls00722]

You'll need some sort of NVM (eeprom, flash or OTP)

I understand that. But in all of above solution, does the manufacture has to program the SN into the eeprom/OPT? imagine, if there are millions of chips taped out, they have to power up each chip, and program the OPT?

I am wondering if the fab has a way to etch different number into each chip during the fabrication?

 

[RBB]

Typically, at least how I've seen this done, is it's programmed into the NVM during a final testing phase.
I don't think the manufacturer necessarily has to do it. The end supplier could.
No there wouldn't be a way to "etch" a different number into each IC during the manufacturing process.