Automated test system having multiple stages

• US 10,725,091 B2
• Filed: 08/28/2017
• Issued: 07/28/2020
• Est. Priority Date: 08/28/2017
• Status: Active Grant

• Current Assignee: Teradyne Incorporated
• Original Assignee: Teradyne Incorporated
• Inventors: Bowyer, David Paul, Pei, Jianfa, Toscano, John P., Campbell, Philip, Smith, Marc LeSueur
• Primary Examiner(s): Hollington, Jermele M
• Assistant Examiner(s): Rhodes-Vivour, Temilade S
• Application Number:
  US15/688,073
• Publication Number:
  US 20190064252A1
• Time in Patent Office: 1,065 Days
• CPC Class Codes: G01R 1/02 General constructional details
• CPC Class Codes: G01R 31/27 Testing of devices without physical removal from the circuit of which they form part, e.g. compensating for effects surrounding elements testing printed circuit boards G01R31/2801
• CPC Class Codes: G01R 31/2863 Contacting devices, e.g. sockets, burn-in boards or mounting fixtures in general G01R1/04
• CPC Class Codes: G01R 31/2867 Handlers or transport devices, e.g. loaders, carriers, trays
• CPC Class Codes: G01R 31/2868 Complete testing stations; systems; procedures; software aspects

Abstract

An example test system includes: a test rack including test slots; first and second shuttles that are configured to move contemporaneously to transport devices towards and away from trays, with at least some of the devices having been tested and at least some of the devices to be tested; first and second robots that are configured to move contemporaneously to move the devices that have been tested from test sockets in test carriers to the first and second shuttles, and to move the devices to be tested from the first and second shuttles to the test sockets in test carriers; and first and second test arms that are configured to move contemporaneously to move the test carriers between the first and second robots and the test rack.

Claims

1. A test system comprising:

a first stage to move a first device that has been tested to a first tray; and

to move a second device to be tested from a second tray;

a second stage to receive the first device and the second device, the second stage to move the first device from a first test socket to the first stage, and to move the second device from the first stage to either the first test socket or a second test socket;

a third stage to move the first device in the first test socket to the second stage, and to move the second device in the first test socket or the second test socket into a test slot in a test rack, the first test socket or the second test socket being part of a test carrier, and the third stage comprising an air-controlled arm that is movable in one dimension to push the test carrier into the test slot;

wherein the second stage comprises cameras to align the second device to the first test socket or the second test socket prior to moving the second device into the first test socket or the second test socket;

wherein the cameras comprise one or more first cameras above the first test socket or the second test socket and one or more second cameras below the first test socket or the second test socket, the one or more first cameras for capturing at least a first image and the one or more second cameras for capturing at least a second image; and

one or more processing devices to use the first image and the second image to control a first robot or a second robot to move the second device to either the first test socket or the second test socket.

2. The test system of claim 1, wherein the first stage, the second stage, and the third stage are configured to operate independently and contemporaneously.

3. The test system of claim 1, wherein the test slot comprises internal guide features to direct the test carrier into position in the test slot.

4. The test system of claim 1, wherein alignment of the second device to the first test socket or the second test socket is to a precision on the order of at least tens of microns.

5. The test system of claim 1, wherein the third stage comprises a pneumatic system that uses air to control movement of the air-controlled arm.

6. The test system of claim 1, further comprising a fourth stage for loading trays into the system, and for removing trays from the system.

7. The test system of claim 1, further comprising a fifth stage comprising the test rack, the fifth stage comprising multiple test slots including the test slot, the third stage for transferring test carriers into, and out of, the test slots.

8. The test system of claim 1, wherein the first stage comprises a first shuttle to move the first device that has been tested towards a first tray, and a second shuttle to move the second device to be tested away from a second tray.

9. The test system of claim 1, wherein the second stage comprises the first robot and the second robot to receive the second device.

10. The test system of claim 1, wherein the third stage comprises a first test arm and a second test arm, the first test arm to move the first device in the first test socket to the second stage, and the first test arm or the second test arm to move the second device in the second test socket into the slot in a test rack.

11. A test system comprising:

a test rack comprising test slots;

first and second shuttles that are configured to move contemporaneously to transport devices towards and away from trays, at least some of the devices having been tested and at least some of the devices to be tested;

first and second robots that are configured to move contemporaneously to move the devices that have been tested from test sockets in test carriers to the first and second shuttles, and to move the devices to be tested from the first and second shuttles to the test sockets in the test carriers;

first and second test arms that are configured to move contemporaneously to move the test carriers between the first and second robots and the test rack; and

a third robot to move the devices between the first and second shuttles and the trays, the third robot to move the devices that have been tested from the first and second shuttles to the trays, and to move the devices to be tested from the trays to the first and second shuttles.

12. The test system of claim 11, wherein the first shuttle is movable independently of the second shuttle, and the second shuttle is movable independently of the first shuttle.

13. The test system of claim 11, wherein the test carriers comprise two test carriers, each test carrier having two test sockets arranged along a longitudinal dimension;

wherein the first robot is configured to service one of the test carriers while the second robot services another one of the test carries; and

wherein the second robot is configured to service the one of the test ers while the first robot services the other one of the test carriers.

14. The test system of claim 11, wherein two or more of the following are configured to move contemporaneously:

the first and second shuttles, the first and second robots, the first and second test arms, and the third robot.

15. The test system of claim 11, wherein all of the following are configured to move contemporaneously:

the first and second shuttles, the first and second robots, the first and second test arms, and the third robot.

16. The test system of claim 11, wherein the first robot is configured to perform first operations comprising:

removing a first device to be tested from the first or second shuttle, holding the first device to be tested, removing a second device that has been tested from a first test socket in a first test carrier, placing the first device to be tested into the first test socket, and placing the second device that has been tested onto the first or second shuttle.

17. The test system of claim 16, wherein the second robot is configured to perform second operations comprising:

removing a third device to be tested from the first or second shuttle, holding the third device to be tested, removing a fourth device that has been tested from a second test socket in a second test carrier, placing the third device to be tested into the second test socket, and placing the fourth device that has been tested onto the first or second shuttle.

18. The test system of claim 17, wherein at least some of the first operations and the second operations are performed contemporaneously.

19. The test system of claim 11, wherein the test system has a footprint that is less than sixteen square meters, that is less than ten square meters, that is less than nine square meters, or that is less than eight square meters.

20. The test system of claim 11, further comprising robotics to control movement of the first and second test arms so that the first and second test arms service different test slots in the test rack contemporaneously.

21. The test system of claim 11, further comprising:

one or more first cameras above the test sockets and one or more second cameras below the test sockets, the one or more first cameras for capturing at least a first image and the one or more second cameras for capturing at least a second image; and

one or more processing devices to use the first image and the second image to control the first robot or the second robot to move devices into or out of the test sockets.

22. The test system of claim 11, wherein the first robot comprises a first camera above the test sockets and the second robot comprises a second camera above the test sockets.

23. A test system comprising:

a test rack comprising test slots;

first and second shuttles that are configured to move contemporaneously to transport devices towards and away from trays, at least some of the devices having been tested and at least some of the devices to be tested;

first and second robots that are configured to move contemporaneously to move the devices that have been tested from test sockets in test carriers to the first and second shuttles, and to move the devices to be tested from the first and second shuttles to the test sockets in the test carriers; and

first and second test arms that are configured to move contemporaneously ove the test carriers between the first and second robots and the test rack;

wherein the test carriers comprise two test carriers, each test carrier having two test sockets arranged along a longitudinal dimension;

wherein the first robot is configured to service one of the test carriers while the second robot services another one of the test carries; and

wherein the second robot is configured to service the one of the test carriers while the first robot services the other one of the test carriers.

24. The test system of claim 23, wherein the first shuttle is movable independently of the second shuttle, and the second shuttle is movable independently of the first shuttle.

25. The test system of claim 23, further comprising:

a third robot to move the devices between the first and second shuttles and the trays, the third robot to move the devices that have been tested from the first and second shuttles to the trays, and to move the devices to be tested from the trays to the first and second shuttles.

26. The test system of claim 25, wherein two or more of the following are configured to move contemporaneously:

the first and second shuttles, the first and second robots, the first and second test arms, and the third robot.

27. The test system of claim 25, wherein all of the following are configured to move contemporaneously:

the first and second shuttles, the first and second robots, the first and second test arms, and the third robot.

28. The test system of claim 23, wherein the first robot is configured to perform first operations comprising:

removing a first device to be tested from the first or second shuttle, holding the first device to be tested, removing a second device that has been tested from a first test socket in a first test carrier, placing the first device to be tested into the first test socket, and placing the second device that has been tested onto the first or second shuttle.

29. The test system of claim 28, wherein the second robot is configured to perform second operations comprising:

removing a third device to be tested from the first or second shuttle, holding the third device to be tested, removing a fourth device that has been tested from a second test socket in a second test carrier, placing the third device to be tested into the second test socket, and placing the fourth device that has been tested onto the first or second shuttle.

30. The test system of claim 29, wherein at least some of the first operations and the second operations are performed contemporaneously.

31. The test system of claim 23, wherein the test system has a footprint that is less than sixteen square meters, that is less than ten square meters, that is less than nine square meters, or that is less than eight square meters.

32. The test system of claim 23, further comprising robotics to control movement of the first and second test arms so that the first and second test arms service different test slots in the test rack contemporaneously.

33. The test system of claim 23, further comprising:

one or more first cameras above the test sockets and one or more second cameras below the test sockets;

the one or more first cameras for capturing at least a first image and the one or more second cameras for capturing at least a second image; and

one or more processing devices to use the first image and the second image to control the first robot or the second robot to move devices into or out of the test sockets.

34. The test system of claim 23, wherein the first robot comprises a first camera above the test sockets and the second robot comprises a second camera above the test sockets.