Patent ID: 11955173
Assignee: TAIWAN SEMICONDUCTOR MANUFACTURING COMPANY LTD.
Field: Computer technology (Electrical engineering)
Classification: CPC G | IPC G

Claim 8:
9. A first fire operation for an OTS selector, comprising:
setting a repetition number of a first fire voltage pulse and a read voltage pulse as one; and
performing at least two cycles, each comprising:
sequentially providing the first fire voltage pulse and the read voltage pulse to the OTS selector;
sensing an output current passing through the OTS selector in response to the first fire voltage pulse and the read voltage pulse;
comparing a peak amplitude of the voltage pulse with a maximum peak amplitude ensuring initialization of the OTS selector, and comparing the repetition number of the first fire voltage pulse and the read voltage pulse with a target repetition number;
ending the first fire operation if the peak amplitude reaches the maximum peak amplitude and the repetition number reaches the target repetition number;
comparing the output current in response to the read voltage pulse with a target off current if the peak amplitude is lower than the maximum peak amplitude or the repetition number is lower than the target repetition number;
ending the first fire operation if the output current in response to the read voltage pulse reaches the target off current;
comparing the repetition number with the target repetition number if the output current in response to the read voltage pulse is lower than the target off current;
setting a next first fire voltage pulse with a greater peak amplitude if the repetition number reaches the target repetition number; and
increasing a repetition number of the next first fire voltage pulse and a following read voltage pulse by one.