Detection device, substrate holder and method for detecting position of substrate on substrate holder

Patent metadata

Field	Value
Publication number	US-10254131-B2
Application number	US-201615512890-A
Country	US
Kind code	B2
Filing date	Sep 22, 2016
Priority date	Oct 23, 2015
Publication date	Apr 9, 2019
Grant date	Apr 9, 2019

Abstract

A detection device, a substrate holder and a method for detecting a position of a substrate on a substrate holder are disclosed. The detection device of the present disclosure is used to detect the position of the substrate carried on the substrate holder, and the substrate holder includes a plurality of carrying positions, each of which is used to carry a substrate. The detection device includes an emitting electrode connected to a signal source, which is disposed at an edge of each carrying position and located at one of upper and lower sides of the substrate carried by the carrying position; and at least one receiving electrode connected to a detector, which is disposed opposite to the emitting electrode and located at the other of the upper and lower sides of the substrate carried by the carrying position.

First claim

What is claimed is:

1. A detection device for detecting position of a substrate carried on a substrate holder, the detection device comprising:
an emitting electrode connected to a signal source, wherein the substrate holder comprises a plurality of carrying positions used to carry the substrate, and wherein the emitting electrode is disposed at an edge of one of the plurality of carrying positions and at a first side of an upper or a lower side of the substrate; and
at least one receiving electrode connected to a detector, wherein the receiving electrode is disposed opposite the emitting electrode and at a second side of the upper or lower side of the substrate different from the first side,
wherein each of the carrying positions is provided with the detection device, and the detection device is disposed at a first edge of the carrying position,
wherein the substrate carried by the carrying position comprises at least two auxiliary dielectric layers disposed at the first edge of the substrate close to the carrying position and arranged in a direction parallel to the first edge, and values of dielectric constants of the auxiliary dielectric layers divided by thicknesses of the auxiliary dielectric layers, respectively, are different from each other, and
wherein, the receiving electrode of the detection device is disposed at a position of the carrying position corresponding to a position of the auxiliary dielectric layer of the substrate, and in a direction parallel to the first edge, and a size of the receiving electrode is greater than or equal to a size of each of the auxiliary dielectric layers, and smaller than or equal to the total size of all of the auxiliary dielectric layers.

2. The detection device of claim 1 , wherein the signal source is a high frequency signal source, and the detector is a current detector.

3. The detection device of claim 2 , wherein a signal frequency generated by the high frequency signal source is between 600 KHz and 800 KHz.

4. The detection device of claim 3 , wherein the detection device comprises a plurality of receiving electrodes respectively connected to different detectors.

5. The detection device of claim 2 , wherein the detection device comprises a plurality of receiving electrodes respectively connected to different detectors.

6. The detection device of claim 1 , wherein the detection device comprises a plurality of receiving electrodes respectively connected to different detectors.

7. The detection device of claim 6 , wherein the plurality of receiving electrodes are arranged in a direction perpendicular to an edge of the carrying position where the detection device is located.

8. The detection device of claim 7 , wherein the plurality of receiving electrodes are arranged in a straight line.

9. The detection device of claim 7 , wherein the plurality of receiving electrodes constitute a matrix.

10. A substrate holder, comprising:
a plurality of carrying positions used to carry a substrate; and
a detection device for detecting position of a substrate carried on the substrate holder, wherein the detection device comprises:
an emitting electrode connected to a signal source, wherein the substrate holder comprises a plurality of carrying positions used to carry the substrate, and wherein the emitting electrode is disposed at an edge of one of the plurality of carrying positions and at a first side of an upper or a lower side of the substrate; and
at least one receiving electrode connected to a detector, wherein the receiving electrode is disposed opposite the emitting electrode and at a second side of the upper or lower side of the substrate different from the first side,
wherein each of the carrying positions is provided with the detection device, and the detection device is disposed at a first edge of the carrying position,
wherein the substrate carried by the carrying position comprises at least two auxiliary dielectric layers disposed at the first edge of the substrate close to the carrying position and arranged in a direction parallel to the first edge, and values of dielectric constants of the auxiliary dielectric layers divided by thicknesses of the auxiliary dielectric layers, respectively, are different from each other, and
wherein, the receiving electrode of the detection device is disposed at a position of the carrying position corresponding to a position of the auxiliary dielectric layer of the substrate, and in a direction parallel to the first edge, and a size of the receiving electrode is greater than or equal to a size of each of the auxiliary dielectric layers, and smaller than or equal to the total size of all of the auxiliary dielectric layers.

11. The substrate holder of claim 10 , wherein each of the carrying positions is provided with two detection devices, one of the detection devices is disposed at a first edge of the carrying position, and the other of the detection devices is disposed at a second edge of the carrying position, and the first edge is perpendicular to the second edge.

12. The substrate holder of claim 10 , wherein the detection device comprises a plurality of receiving electrodes which constitute a matrix.

13. The substrate holder of claim 12 , wherein,
each of the carrying positions is provided with the detection device, and the detection device is disposed at a corner of the carrying position.

14. The substrate holder of claim 10 ,
wherein the signal source is a high frequency signal source, and the detector is a current detector.

15. The substrate holder of claim 14 ,
wherein a signal frequency generated by the high frequency signal source is between 600 KHz and 800 KHz.

16. The substrate holder of claim 10 ,
wherein the detection device comprises a plurality of receiving electrodes respectively connected to different detectors.

17. The substrate holder of claim 10 ,
wherein a plurality of receiving electrodes are arranged in a direction perpendicular to an edge of the carrying position where the detection device is located.

Assignees

• Boe Technology Group Co Ltd
• Hefei Boe Optoelectronics Tech

Inventors

• Li Guodong
• Wei Zhen
• Guo Shibo
• Sun Weiwei
• Jiang Chenchen
• Zhao Qiong

Classifications

• G01D5/20 Primary

  by varying inductance, e.g. by a movable armature · CPC title

• G01D5/2412

  by varying overlap · CPC title

• G01D5/2403 Primary

  by moving plates, not forming part of the capacitor itself, e.g. shields · CPC title