Capacitor and method of fabricating the same

• US 9,455,090 B2
• Filed: 10/10/2012
• Issued: 09/27/2016
• Est. Priority Date: 11/24/2011
• Status: Active Grant

• Current Assignee: LG Innotek Company Limited (LG Corporation)
• Original Assignee: LG Innotek Company Limited (LG Corporation)
• Inventors: Seo, Sang Won, Kwon, Seung Hwa, Ji, Chil Young, Ko, Yong Jun, Park, Hyun Kyu, Seo, Jeong Gi
• Primary Examiner(s): Sinclair, David M
• Application Number:
  US14/360,899
• Publication Number:
  US 20150022939A1
• Time in Patent Office: 1,448 Days
• US Class Current: 1/1
• CPC Class Codes: H01G 5/011 Electrodes
• CPC Class Codes: H01G 5/0134 Solid dielectrics
• CPC Class Codes: H01G 5/16 using variation of distance between electrodes

Abstract

Disclosed are a capacitor and a method of fabricating the same. The capacitor includes a first electrode; a second electrode spaced apart from the first electrode while facing the first electrode; a driving member connected to the second electrode to move the second electrode relative to the first electrode; and an insulating connection member between the driving member and the second electrode.

Claims

1. A capacitor comprising:

a first electrode part;

a second electrode part spaced apart from the first electrode part and disposed on an upper surface of the first electrode part;

a driving member connected to the second electrode part to move the second electrode part relative to the first electrode part; and

an insulating connection member between the driving member and the second electrode part;

wherein the driving member comprises first and second driving members spaced apart from each other; and

wherein each of the first and second driving members comprises;

a first driving electrode part configured to move the second electrode part in a horizontal direction relative to the first electrode part and control an overlap area between the upper surface of the first electrode part and a lower surface of the second electrode part; and

a second driving electrode part configured to move the second electrode part in a vertical direction crossing the horizontal direction relative to the first electrode part.

2. The capacitor of claim 1, wherein the second electrode part is connected to the first driving member or the second driving member through the insulating connection member.

3. The capacitor of claim 2, wherein the insulating connection member includes an oxide, a nitride, or a polymer.

4. The capacitor of claim 2, wherein the second electrode part is partially inserted into the insulating connection member.

5. The capacitor of claim 1, wherein the first electrode part comprises:

a first electrode including a first connection electrode and a plurality of first branch electrodes extending from the first connection electrode; and

a second electrode spaced apart from the first electrode and including a second connection electrode and a plurality of second branch electrodes extending from the second connection electrode.

6. The capacitor of claim 3, wherein the second electrode part comprises:

a main electrode extending in a first direction;

a plurality of first sub-electrodes extending from the main electrode and corresponding to the first branch electrodes, respectively; and

a plurality of second sub-electrodes extending from the main electrode and corresponding to the second branch electrodes, respectively.

7. The capacitor of claim 6, wherein the second electrode part further comprises:

a third connection electrode connected to the first sub-electrodes; and

a fourth connection electrode connected to the second sub-electrodes.

8. The capacitor of claim 1, further comprising a substrate for fixing the first electrode part and the first driving member or the second driving member, wherein the second electrode part is moved relative to the substrate.

9. A capacitor comprising:

a substrate;

a first electrode part on the substrate;

a second electrode part overlapping with the first electrode part on the substrate and disposed on an upper surface of the first electrode part; and

a driving member fixed to the substrate to control a distance between the first and second electrode parts and an overlap area between the first and second electrode parts;

wherein the first electrode part comprises;

a first electrode facing a part of the second electrode part; and

a third electrode spaced apart from the first electrode while facing another part of the second electrode part;

wherein the driving member comprises first and second driving members spaced apart from each other; and

wherein each of the first and second driving members comprises;

a first driving electrode part configured to move the second electrode part in a horizontal direction relative to the first electrode part and control an overlap area between the upper surface of the first electrode part and a lower surface of the second electrode part; and

a second driving electrode part configured to move the second electrode part in a vertical direction crossing the horizontal direction relative to the first electrode part.

10. The capacitor of claim 9, further comprising a dielectric layer between the first and second electrode parts.

11. The capacitor of claim 9, wherein the first driving electrode part comprises:

a first driving electrode connected to the second electrode part; and

a third driving electrode overlapping with the first driving electrode.

12. The capacitor of claim 11, further comprising an insulating connection member connected to the second electrode part, wherein the first driving electrode is connected to the insulating connection member.

13. The capacitor of claim 11, wherein the first driving electrode part further comprises:

a fixing part fixed to the substrate and connected to the third driving electrode.

14. The capacitor of claim 9, further comprising an insulating connection member interposed between the first driving member or the second driving member and the second electrode part, wherein the second electrode part is physically connected to the first driving member or the second driving member through the insulating connection member, and the second electrode part and the first driving member or the second driving member are electrically insulated from each other.

15. The capacitor of claim 9, further comprising an input wire connected to the first electrode of the first electrode part and an output wire connected to the third electrode of the first electrode part.

16. The capacitor of claim 9, wherein the first electrode of the first electrode part comprises a first connection electrode and a plurality of first branch electrodes extending from the first connection electrode;

and wherein the third electrode of the first electrode part comprises a second connection electrode and a plurality of second branch electrodes extending from the second connection electrode.

17. A capacitor comprising:

a first electrode part;

a second electrode part spaced apart from the first electrode part and disposed on an upper surface of the first electrode part;

a driving member connected to the second electrode part to move the second electrode part relative to the first electrode part; and

an insulating connection member between the driving member and the second electrode part;

wherein the second electrode part comprises;

a support electrode facing the first electrode part; and

a protruding electrode protruding from the support electrode toward the first electrode part;

wherein the driving member is connected to the support electrode through the insulating connection member,

wherein the driving member comprises first and second driving members spaced apart from each other, and

wherein each of the first and second driving members comprises;

a first driving electrode part configured to move the second electrode part in a horizontal direction relative to the first electrode part and control an overlap area between the upper surface of the first electrode part and a lower surface of the second electrode part; and

a second driving electrode part configured to move the second electrode part in a vertical direction crossing the horizontal direction relative to the first electrode part.

18. The capacitor of claim 17, wherein the support electrode and the protruding electrode are integrally formed with each other.

19. The capacitor of claim 17, wherein the protruding electrode extends in one direction, and

wherein the first electrode part includes a branch electrode corresponding to the protruding electrode.