Patent ID: 7451010

Claim:
A chip information character set generation system comprising: a processor coupled to at least one storage device, the storage device configured to store the chip information character set; a computer program code loaded on the at least one storage device and executable by the processor to perform a method of generating the chip information character set for chip marking from a first chip information character set, the generated chip information character set having fewer characters than the first chip information character set, the method comprising: generating a lot ID from a first lot ID used in a fabrication line for a semiconductor device, by coding the first lot ID using at least one of a decimal numeration system or a 62 decimal numeration system, wherein the generated lot ID has fewer characters than the first lot ID; generating a 1-character wafer identifier from a first wafer number by coding the first wafer number as a symbol from a set of identification symbols; and generating a 1- or a 2-character chip coordinate from first chip coordinates of the chip in the wafer by coding the first chip coordinates using at least one of the decimal numeration system or the 62 decimal numeration system, wherein the generated chip coordinate has fewer characters than the first chip coordinates.