Patent ID: 11874981
Assignee: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.
Field: Computer technology (Electrical engineering)
Classification: CPC G  Y | IPC G

Claim 1:
2. A display device comprising:
a flexible substrate;
a first insulating layer over the flexible substrate;
a second insulating layer over the flexible substrate;
a first semiconductor layer over the second insulating layer;
a first conductive layer electrically connected to the first semiconductor layer, the first conductive layer being in contact with a top surface of the first semiconductor layer;
a third insulating layer over the first semiconductor layer;
a second conductive layer over the third insulating layer;
a third conductive layer over the third insulating layer;
a second semiconductor layer over the third insulating layer;
a fourth insulating layer over the second semiconductor layer;
a fourth conductive layer over the fourth insulating layer, the fourth conductive layer functioning as a gate electrode of a second transistor;
a fifth insulating layer over the fourth conductive layer;
a first electrode layer of a display element over the fifth insulating layer; and
a second electrode layer of the display element over the first electrode layer,
wherein the first conductive layer overlaps with the second conductive layer, the third conductive layer, the fourth conductive layer, and the second semiconductor layer,
wherein the first semiconductor layer comprises silicon, and
wherein the second semiconductor layer comprises an oxide semiconductor.