Patent ID: 8240549

Claim:
A carrier tray used during manufacturing of electrical components which includes passing the carrier tray into and out of process chambers, the carrier tray comprising: a container having pockets used to hold a set of the electrical components; and a radio frequency identification (RFID) device on the container which withstands exposure to temperatures, the RFID device comprising: a processor; an RF unit comprising a transmitter/receiver circuitry; an antenna operably coupled to the RF unit; a memory storing a counter value and instructions executable by the processor; a counter module capable of generating a counter value for storage in the memory; the processor, RF unit, counter module and memory coupled by a bus; and the counter value indicating a cumulative count indicating a duration of exposure of the container to temperatures greater than or equal to 100 degrees Celsius in the process chambers for a first set of the electrical components and for a second set of the electrical components.