US 11,855,075 B2
Electrostatic discharge protection circuit
Do Hee Kim, Icheon-si Gyeonggi-do (KR)
Assigned to SK hynix Inc., Icheon-si (KR)
Filed by SK hynix Inc., Icheon-si Gyeonggi-do (KR)
Filed on Jun. 22, 2022, as Appl. No. 17/846,569.
Claims priority of application No. 10-2022-0002195 (KR), filed on Jan. 6, 2022.
Prior Publication US 2023/0215863 A1, Jul. 6, 2023
Int. Cl. H01L 27/02 (2006.01); H02H 9/04 (2006.01)
CPC H01L 27/0266 (2013.01) [H02H 9/046 (2013.01)] 20 Claims
OG exemplary drawing
 
1. An electrostatic discharge protection circuit, comprising:
a pull-down switch;
a dummy pattern arranged parallel to the pull-down switch in a first direction;
clamp switches arranged parallel to each other in the first direction between the dummy pattern and the pull-down switch; and
a resistor arranged parallel to the pull-down switch and configured to transfer a power supply voltage supplied through a power terminal to a first gate pattern of the pull-down switch,
wherein drains of the clamp switches are coupled in common to the power terminal,
wherein sources of the clamp switches are coupled in common to a ground terminal, and
wherein a first end of the pull-down switch and a second end of the resistor are coupled to each other through a first conductive line extending in the first direction, the pull-down switch, the resistor and the first conductive line are formed in a same layer.