This standard BS IEC 63011-2:2018 Integrated circuits. Three dimensional integrated circuits is classified in these ICS categories:
31.200 Integrated circuits. Microelectronics
IEC 63011-2:2018 provides specifications of initial alignment and alignment maintenance between multiple stacked integrated circuits during the die bonding process. These specifications define the alignment keys and operating procedures of the keys. These specifications apply only if electrical coupling method of die-to-die alignment is used in the die stacking.