US 11,955,173 B2
First fire operation for ovonic threshold switch selector
Elia Ambrosi, Hsinchu (TW); Cheng-Hsien Wu, Hsinchu (TW); Hengyuan Lee, Hsinchu County (TW); Chien-Min Lee, Hsinchu County (TW); and Xinyu Bao, Fremont, CA (US)
Assigned to Taiwan Semiconductor Manufacturing Company, Ltd., Hsinchu (TW)
Filed by Taiwan Semiconductor Manufacturing Company, Ltd., Hsinchu (TW)
Filed on May 27, 2022, as Appl. No. 17/826,180.
Prior Publication US 2023/0386573 A1, Nov. 30, 2023
Int. Cl. G11C 13/00 (2006.01)
CPC G11C 13/003 (2013.01) [G11C 2213/72 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A first fire operation for an ovonic threshold switch (OTS) selector, comprising:
setting a peak amplitude of a voltage pulse; and
performing at least one cycle, comprising:
providing the voltage pulse to the OTS selector;
sensing an output current passing through the OTS selector in response to the received voltage pulse;
comparing a peak amplitude of the voltage pulse with a maximum peak amplitude ensuring initialization of the OTS selector;
ending the first fire operation if the peak amplitude reaches the maximum peak amplitude;
comparing the output current with a target current indicative of initialization of the OTS selector if the peak amplitude is lower than the maximum peak amplitude;
ending the first fire operation if the output current reaches the target current; and
setting another voltage pulse with a greater peak amplitude if the output current is lower than the target current.