Circuit board anomaly indication

Patent metadata

Field	Value
Publication number	US-11435298-B2
Application number	US-202016937782-A
Country	US
Kind code	B2
Filing date	Jul 24, 2020
Priority date	Jul 24, 2020
Publication date	Sep 6, 2022
Grant date	Sep 6, 2022

Abstract

In some examples, a system receives a first image of a circuit board produced by a first production stage, and compares the first image to a second image of the circuit board acquired at a second production stage for the circuit board. The system indicates an anomaly with the circuit board based on the comparing.

First claim

What is claimed is:

1. A method comprising:
receiving, by a system comprising a hardware processor, a first image of a circuit board produced by a first production stage;
storing, by the system, a first identifier of the circuit board in association with the first image, wherein the first identifier is obtained by a first reader at the first production stage;
receiving, by the system, a second identifier associated with a second image, wherein the second identifier is obtained by a second reader at a second production stage; and
retrieving, by the system, the first image to compare to the second image based on the first identifier matching the second identifier;
comparing, by the system, the first image to the second image of the circuit board acquired at the second production stage for the circuit board; and
indicating, by the system, an anomaly with the circuit board based on the comparing.

2. The method of claim 1 , wherein the indicating of the anomaly is responsive to the first image not matching the second image.

3. The method of claim 1 , wherein the first image is a first multi-spectral image of the circuit board, and the second image is a second multi-spectral image of the circuit board.

4. The method of claim 1 , wherein each of the first identifier and the second identifier is based on reading a Radio-Frequency Identification (RFID) tag attached to the circuit board.

5. The method of claim 1 , comprising:
acquiring, using a first sensor at a first location of the first production stage, the first image after the circuit board has been produced by the first production stage; and
acquiring, using a second sensor at a second location of the second production stage, the second image after the circuit board has been transported to the second location from the first location and prior to processing of the circuit board in the second production stage.

6. The method of claim 1 , wherein the indicating of the anomaly with the circuit board comprises generating a visual representation with an indicator representing a portion of the circuit board associated with the anomaly.

7. The method of claim 1 , wherein the comparing comprises:
comparing a first image portion of the first image with a second image portion of the second image, the first image portion and the second image portion representing respective portions of the circuit board expected to remain constant from the first production stage to the second production stage.

8. The method of claim 1 , further comprising:
comparing the first image or the second image to information representing a target design of the circuit board,
wherein the indicating of the anomaly is further based on the comparing of the first image or the second image to the information representing the target design of the circuit board.

9. A non-transitory machine-readable storage medium comprising instructions that upon execution cause a system to:
receive a first image of a circuit board produced by a first production stage;
receive a second image of the circuit board acquired at a second production stage for the circuit board, the second image acquired prior to processing of the circuit board by the second production stage and after processing of the circuit board by the first production stage;
store a first identifier of the circuit board in association with the first image,
wherein the first identifier is obtained by a first reader at the first production stage;
receive a second identifier associated with the second image, wherein the second identifier is obtained by a second reader at the second production stage; and
retrieve, the first image to compare to the second image based on the first identifier matching the second identifier;

compare the first image to the second image; and
indicate an anomaly with the circuit board based on a mismatch of the first image and the second image identified by the comparing.

10. The non-transitory machine-readable storage medium of claim 9 , wherein the first image is a first multi-spectral image of the circuit board, and the second image is a second multi-spectral image of the circuit board.

11. The non-transitory machine-readable storage medium of claim 9 , wherein the instructions that upon execution cause the system to:
identify the circuit board based on an identifier included in a Radio-Frequency Identification (RFID) tag attached on the circuit board.

12. A method comprising:
receiving, by a system comprising a hardware processor, a first image of a circuit board produced by a first production stage;
acquiring, using a first sensor at a first location of the first production stage, the first image after the circuit board has been produced by the first production stage;
acquiring, using a second sensor at a second location of a second production stage, a second image after the circuit board has been transported to the second location from the first location and prior to processing of the circuit board in the second production stage;
comparing, by the system, the first image to the second image of the circuit board acquired at the second production stage for the circuit board; and
indicating, by the system, an anomaly with the circuit board based on the comparing.

13. The method of claim 12 , wherein the indicating of the anomaly with the circuit board comprises generating a visual representation with an indicator representing a portion of the circuit board associated with the anomaly.

14. The method of claim 12 , wherein the comparing comprises:
comparing a first image portion of the first image with a second image portion of the second image, the first image portion and the second image portion representing respective portions of the circuit board expected to remain constant from the first production stage to the second production stage.

15. The method of claim 12 , further comprising:
comparing the first image or the second image to information representing a target design of the circuit board,
wherein the indicating of the anomaly is further based on the comparing of the first image or the second image to the information representing the target design of the circuit board.

Assignees

• Hewlett Packard Entpr Dev Lp

Inventors

• Moore David A
• Hughes Jonathon
• Mixon Michael L
• La Fontaine Otero Gretchen
• Vlasak Niysaan E

Classifications

• G01N21/95607 Primary

  using a comparative method · CPC title

• H05K13/081

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• G01N2021/95638

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• G01N21/95684

  Patterns showing highly reflecting parts, e.g. metallic elements · CPC title

• G01N21/9501

  Semiconductor wafers (manufacturing processes per se of semiconductor devices implementing a measuring step H10P74/20) · CPC title