Apparatus equipped with crack detection circuit and detection system

Patent metadata

Field	Value
Publication number	US-10996265-B2
Application number	US-201616095858-A
Country	US
Kind code	B2
Filing date	Oct 28, 2016
Priority date	Oct 28, 2016
Publication date	May 4, 2021
Grant date	May 4, 2021

Abstract

A crack detection system and an apparatus equipped with a crack detection circuit, including a main body, and a detection control circuit and a detection coil disposed on the main body. The main body includes a top surface, a bottom surface, and a side surface coupled between the top surface and the bottom surface. The detection coil is distributed on an edge of the main body and disposed surrounding the side surface. Two ends of the detection coil are electrically coupled to the detection control circuit to form a closed-loop detection circuit. The detection circuit is configured to detect a crack in an edge region of the main body. The detection coil includes a plurality of detection sections sequentially coupled from head-to-tail, and adjacent detection sections are not collinear.

First claim

What is claimed is:

1. An apparatus, comprising:
a crack detection circuit configured to detect a crack in an edge region of a main body;
the main body coupled to the crack detection circuit and comprising:
a top surface;
a bottom surface; and
a side surface coupled between the top surface and the bottom surface;

a detection control circuit disposed on the main body; and
a detection coil disposed on the main body and distributed on an edge of the main body, wherein at least a part of the detection coil is disposed surrounding the side surface, wherein two ends of the detection coil are electrically coupled to the detection control circuit to form a closed-loop detection circuit, wherein the detection coil comprises a plurality of detection sections sequentially coupled from head-to-tail, wherein adjacent detection sections are non-collinear, wherein the detection coil surrounds the side surface to extend for at least two circles, wherein the at least two circles are arranged in a direction perpendicular to the side surface, and wherein detection line sections of adjacent circles are spaced from each other.

2. The apparatus of claim 1 , wherein the detection coil further comprises a plurality of detection line sections sequentially coupled in series, and wherein each detection line section comprises at least two detection sections.

3. The apparatus of claim 2 , wherein each detection line section extends in a Z shape.

4. The apparatus of claim 2 , wherein each detection line section comprises a first detection line, a second detection line, and a pair of third detection lines, wherein the first detection line extends along an extension direction of an edge of the top surface of the main body, wherein the second detection line extends along an extension direction of an edge of the bottom surface of the main body, wherein a position of the first detection line and a position of the second detection line are staggered, wherein one of the pair of third detection lines is coupled between the first detection line and the second detection line, and wherein the other of the pair of third detection lines is coupled between the second detection line and a first detection line of a neighboring detection line section.

5. The apparatus of claim 4 , wherein in each detection line section, the first detection line and the second detection line extend in a first direction, and the pair of third detection lines extends in a second direction.

6. The apparatus of claim 5 , wherein the third detection lines are coupled perpendicular to and between the first detection line and the second detection line.

7. The apparatus of claim 2 , wherein each detection line section extends in a V shape.

8. The apparatus of claim 2 , wherein each detection line section extends in a parabolic shape.

9. The apparatus of claim 1 , wherein detection sections of adjacent circles are disposed in the direction perpendicular to the side surface in a staggered manner.

10. The apparatus of claim 1 , wherein an outermost detection coil is disposed on the side surface, and wherein another detection coil is embedded inside the side surface.

11. The apparatus of claim 1 , wherein the detection coil is embedded inside the main body.

12. The apparatus of claim 1 , wherein the main body comprises a chip.

13. The apparatus of claim 1 , wherein the detection coil is exposed on an outer surface of the main body.

14. The apparatus of claim 1 , wherein the main body comprises a glass substrate.

15. The apparatus of claim 1 , wherein the main body comprises a liquid crystal panel.

16. A crack detection system, comprising:
an apparatus, comprising:
a crack detection circuit configured to detect a crack in an edge region of a main body;
the main body coupled to the crack detection circuit and comprising:
a top surface;
a bottom surface; and
a side surface coupled between the top surface and the bottom surface;

a detection control circuit disposed on the main body; and
a detection coil disposed on the main body and distributed on an edge of the main body, wherein at least a part of the detection coil is disposed surrounding the side surface, wherein two ends of the detection coil are electrically coupled to the detection control circuit to form a closed-loop detection circuit, wherein the detection coil comprises a plurality of detection sections sequentially coupled from head-to-tail, wherein adjacent detection sections are non-collinear, wherein the detection coil surrounds the side surface to extend for at least two circles, wherein the at least two circles are arranged in a direction perpendicular to the side surface, and wherein detection line sections of adjacent circles are spaced from each other;

a detection device coupled to the apparatus and comprising:
a coupling coil; and
a detection device control circuit electrically coupled to the coupling coil and configured to:
provide an electrical signal for the coupling coil to implement coupling between the coupling coil and the detection coil of the apparatus and to generate an induced current to supply power to the detection control circuit of the apparatus; and
detect the crack on the main body by determining coupling or decoupling of the detection coil.

17. The crack detection system of claim 16 , wherein detection sections of adjacent circles are disposed in the direction perpendicular to the side surface in a staggered manner.

18. The crack detection system of claim 16 , wherein an outermost detection coil is disposed on the side surface, and wherein another detection coil is embedded inside the side surface.

19. The crack detection system of claim 16 , wherein the detection coil further comprises a plurality of detection line sections sequentially coupled in series, wherein each detection line section comprises at least two detection sections, and wherein each detection line section extends in a Z shape, a V shape, or a parabolic shape.

20. The crack detection system of claim 16 , wherein the main body comprises a chip, a glass substrate, or a liquid crystal panel.

Assignees

• Huawei Tech Co Ltd

Inventors

• Si Hui
• Long Haohui
• Fang Jianping
• Ye Runqing
• Hong Weiqiang
• Wang Yunfei
• Liu Taixiang

Classifications

• H10P74/277 Primary

  Circuits for electrically characterising or monitoring manufacturing processes, e.g. circuits in tested chips or circuits in testing wafers · CPC title

• G01R31/2856 Primary

  Internal circuit aspects, e.g. built-in test features; Test chips; Measuring material aspects, e.g. electro migration [EM] · CPC title

• H01L22/34

  Electricity · mapped topic