US 11,942,176 B2
Semiconductor memory device
Tomoya Sanuki, Yokkaichi Mie (JP); Xu Li, Yokohama Kanagawa (JP); Masayuki Miura, Tokyo (JP); Takayuki Miyazaki, Tokyo (JP); Toshio Fujisawa, Yokohama Kanagawa (JP); Hiroto Nakai, Yokohama Kanagawa (JP); Hideko Mukaida, Tokyo (JP); and Mie Matsuo, Yokkaichi Mie (JP)
Assigned to Kioxia Corporation, Tokyo (JP)
Filed by Kioxia Corporation, Tokyo (JP)
Filed on Sep. 15, 2021, as Appl. No. 17/475,482.
Claims priority of application No. 2021-044868 (JP), filed on Mar. 18, 2021.
Prior Publication US 2022/0301599 A1, Sep. 22, 2022
Int. Cl. G11C 5/00 (2006.01); G11C 5/14 (2006.01); G11C 16/30 (2006.01); H02M 3/158 (2006.01); H10B 41/27 (2023.01); H10B 43/27 (2023.01)
CPC G11C 5/14 (2013.01) [G11C 16/30 (2013.01); H02M 3/1582 (2013.01); H10B 41/27 (2023.02); H10B 43/27 (2023.02)] 19 Claims
OG exemplary drawing
 
1. A semiconductor memory device comprising
a plastic package including:
an inductor;
a first memory chip including a booster circuit that boosts a voltage from a first voltage to a second voltage using the inductor; and
a second memory chip having a terminal supplied with the second voltage from the first memory chip, wherein
booster circuit includes:
a switching element having one end connected to the inductor and another end having a ground potential;
a rectifier circuit that is connected to the inductor and rectifies an output voltage of the switching element; and
a control circuit that performs switching control of turning on or off the switching element according to an output voltage of the rectifier circuit, and
the plastic package includes a capacitor having one end connected to an output node of the rectifier circuit and another end having a potential of the ground potential,
the first memory chip includes a first terminal connected to one end of the inductor and a second terminal connected to the output node and the one end of the capacitor, and
each of the first memory chip and the second memory chip includes a third terminal connected to the one end of the capacitor, and a fourth terminal supplied with a third voltage lower than the second voltage, and
the plastic package further includes a first pin supplied with the first voltage and connected to another end of the inductor, and a second pin supplied with the third voltage and connected to the second terminal.