Patent ID: 11923032
Assignee: YANGTZE MEMORY TECHNOLOGIES CO., LTD.
Field: Computer technology (Electrical engineering)
Classification: CPC G | IPC G

Claim 11:
12. A three-dimensional (3D) memory device, comprising:
a plurality of memory cells connected to word lines and bit lines configured for addressing each of the plurality of memory cells, wherein the plurality of memory cells are vertically stacked; and
a circuit for detecting leakage between the word lines, comprising:
a first coupling capacitor, wherein a first terminal of the first coupling capacitor is connected to a first word line through a first switch, and the first terminal of the first coupling capacitor is also connected to a first voltage supply through a second switch;
a second coupling capacitor, wherein a first terminal of the second coupling capacitor is connected to a second word line through a third switch, and the first terminal of the second coupling capacitor is connected to a second voltage supply through a fourth switch; and
a comparator, wherein a first input of the comparator is connected to a second terminal of the first coupling capacitor and a second input of the comparator is connected to a second terminal of the second coupling capacitor, wherein:
the comparator is configured to send a signal indicating there is leakage between the first word line and the second word line when a differential voltage between the first input and the second input of the comparator is larger than a hysteresis level of the comparator.