Logic circuit and semiconductor device

• US 8,884,651 B2
• Filed: 11/07/2013
• Issued: 11/11/2014
• Est. Priority Date: 10/16/2009
• Status: Active Grant

• Current Assignee: Semiconductor Energy Laboratory Co., Ltd.
• Original Assignee: Semiconductor Energy Laboratory Co., Ltd.
• Inventors: Yamazaki, Shunpei, Koyama, Jun, Tsubuku, Masashi, Noda, Kosei
• Primary Examiner(s): WHITE, DYLAN C
• Application Number:
  US14/073,902
• Publication Number:
  US 20140061639A1
• Time in Patent Office: 369 Days
• Field of Search: 326 81- 83, 327/108, 327/109
• US Class Current: 326/81
• CPC Class Codes: G09G 2300/0439 Pixel structures
• CPC Class Codes: G09G 2300/08 Active matrix structure, i.e. with use of active elements, inclusive of non-linear two terminal elements, in the pixels together with light emitting or modulating elements
• CPC Class Codes: G09G 2300/0842 forming a memory circuit, e.g. a dynamic memory with one capacitor
• CPC Class Codes: G09G 2310/0267 Details of drivers for scan electrodes, other than drivers for liquid crystal, plasma or OLED displays
• CPC Class Codes: G09G 2310/0275 Details of drivers for data electrodes, other than drivers for liquid crystal, plasma or OLED displays, not related to handling digital grey scale data or to communication of data to the pixels by means of a current
• CPC Class Codes: G09G 2310/0286 Details of a shift registers arranged for use in a driving circuit
• CPC Class Codes: G09G 2310/08 Details of timing specific for flat panels, other than clock recovery
• CPC Class Codes: G09G 3/20 for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
• CPC Class Codes: G09G 3/2092 Details of a display terminals using a flat panel, the details relating to the control arrangement of the display terminal and to the interfaces thereto suitable for both CRT and flat panel G09G5/003; specific for a CRT G09G1/165
• CPC Class Codes: G09G 3/3233 with pixel circuitry controlling the current through the light-emitting element
• CPC Class Codes: G09G 3/3291 in which the data driver supplies a variable data voltage for setting the current through, or the voltage across, the light-emitting elements
• CPC Class Codes: G09G 3/36 using liquid crystals
• CPC Class Codes: G09G 3/3648 using an active matrix G09G3/367 - G09G3/3696 take precedence
• CPC Class Codes: G11C 19/184 with field-effect transistors, e.g. MOS-FET
• CPC Class Codes: G11C 19/28 using semiconductor elements G11C19/14, G11C19/36 take precedence
• CPC Class Codes: H01L 27/1222 with a particular composition, shape or crystalline structure of the active layer
• CPC Class Codes: H01L 27/1225 with semiconductor materials not belonging to the group IV of the periodic table, e.g. InGaZnO
• CPC Class Codes: H01L 27/124 with a particular composition, shape or layout of the wiring layers specially adapted to the circuit arrangement, e.g. scanning lines in LCD pixel circuits wiring structures per se H01L23/52
• CPC Class Codes: H01L 27/1255 integrated with passive devices, e.g. auxiliary capacitors
• CPC Class Codes: H01L 29/7869 having a semiconductor body comprising an oxide semiconductor material, e.g. zinc oxide, copper aluminium oxide, cadmium stannate
• CPC Class Codes: H03K 17/161 : in field-effect transistor switches
• CPC Class Codes: H03K 19/00315 : in field-effect transistor circuits
• CPC Class Codes: H03K 19/096 : Synchronous circuits, i.e. using clock signals H03K19/01728, H03K19/01855 take precedence

Abstract

To reduce a leakage current of a transistor so that malfunction of a logic circuit can be suppressed. The logic circuit includes a transistor which includes an oxide semiconductor layer having a function of a channel formation layer and in which an off current is 1×10⁻¹³ A or less per micrometer in channel width. A first signal, a second signal, and a third signal that is a clock signal are input as input signals. A fourth signal and a fifth signal whose voltage states are set in accordance with the first to third signals which have been input are output as output signals.

Claims

1. A semiconductor device comprising:

first to eighth transistors,

wherein one of source and drain of the first transistor is electrically connected to one of source and drain of the second transistor,

wherein one of source and drain of the third transistor is electrically connected to a gate of the first transistor,

wherein one of source and drain of the fourth transistor is electrically connected to a gate of the second transistor,

wherein one of source and drain of the fifth transistor is electrically connected to one of source and drain of the sixth transistor,

wherein one of source and drain of the seventh transistor is electrically connected to a gate of the fifth transistor,

wherein one of source and drain of the eighth transistor is electrically connected to a gate of the sixth transistor,

wherein the other of source and drain of the first transistor is electrically connected to the other of source and drain of the fifth transistor,

wherein the other of source and drain of the second transistor is electrically connected to the other of source and drain of the sixth transistor,

wherein the other of source and drain of the third transistor is electrically connected to the other of source and drain of the eighth transistor,

wherein the other of source and drain of the fourth transistor is electrically connected to the other of source and drain of the seventh transistor,

wherein the one of source and drain of the first transistor is electrically connected to a first output terminal,

wherein the other of source and drain of the third transistor is electrically connected to a first input terminal,

wherein the other of source and drain of the fourth transistor is electrically connected to a second input terminal, and

wherein the one of source and drain of the fifth transistor is electrically connected to a second output terminal.

2. A display device comprising:

a driver circuit comprising the semiconductor device according to claim 1; and

a pixel portion including a pixel whose display state is controlled by the driver circuit.

3. An electronic device comprising:

the semiconductor device according to claim 1 or the display device according to claim 2; and

an input unit, an LED lamp, or a speaker.

4. A semiconductor device comprising:

first to eighth transistors; and

first to fourth capacitor,

wherein one of source and drain of the first transistor is electrically connected to one of source and drain of the second transistor,

wherein one of source and drain of the third transistor is electrically connected to a gate of the first transistor,

wherein one of source and drain of the fourth transistor is electrically connected to a gate of the second transistor,

wherein one of source and drain of the fifth transistor is electrically connected to one of source and drain of the sixth transistor,

wherein one of source and drain of the seventh transistor is electrically connected to a gate of the fifth transistor,

wherein one of source and drain of the eighth transistor is electrically connected to a gate of the sixth transistor,

wherein the other of source and drain of the first transistor is electrically connected to the other of source and drain of the fifth transistor,

wherein the other of source and drain of the second transistor is electrically connected to the other of source and drain of the sixth transistor,

wherein the other of source and drain of the third transistor is electrically connected to the other of source and drain of the eighth transistor,

wherein the other of source and drain of the fourth transistor is electrically connected to the other of source and drain of the seventh transistor,

wherein the one of source and drain of the first transistor is electrically connected to a first output terminal,

wherein the other of source and drain of the third transistor is electrically connected to a first input terminal,

wherein the other of source and drain of the fourth transistor is electrically connected to a second input terminal,

wherein the one of source and drain of the fifth transistor is electrically connected to a second output terminal,

wherein a first terminal of the first capacitor is electrically connected to the gate of the first transistor,

wherein a second terminal of the first capacitor is electrically connected to the one of source and drain of the first transistor,

wherein a first terminal of the second capacitor is electrically connected to the gate of the second transistor,

wherein a second terminal of the second capacitor is electrically connected to the other of source and drain of the second transistor,

wherein a first terminal of the third capacitor is electrically connected to the gate of the fifth transistor,

wherein a second terminal of the third capacitor is electrically connected to the one of source and drain of the fifth transistor,

wherein a first terminal of the fourth capacitor is electrically connected to the gate of the sixth transistor, and

wherein a second terminal of the fourth capacitor is electrically connected to the other of source and drain of the sixth transistor.

5. A display device comprising:

a driver circuit comprising the semiconductor device according to claim 4; and

a pixel portion including a pixel whose display state is controlled by the driver circuit.

6. An electronic device comprising:

the semiconductor device according to claim 4 or the display device according to claim 5; and

an input unit, an LED lamp, or a speaker.