Tray flipper and method for parts inspection
First Claim
1. A machine-vision system for inspecting a device, the device having a first side and a second side, the machine-vision system comprising:
- a first inspection station for inspecting a first side of a device;
a second inspection station for inspecting a second side of a device; and
a tray-transfer mechanism that operates to move the device in a tray, the tray having a height, a long-dimension side and a short-dimension side, from the first inspection station to the second inspection station in a direction substantially perpendicular to the long-dimension side, wherein the short dimension side is shorter than the long dimension side and longer than the height, and wherein the tray-transfer mechanism further includes an inverting mechanism that operates to invert the device so that the first side of the device can be inspected at the first inspection station and the second side of the device can be inspected at the second inspection station, wherein the inverting mechanism further comprises a mechanism for flipping the devices carried in a tray, the mechanism further comprising;
a first jaw having a surface for receiving a first tray;
a second jaw having a surface for receiving a second tray;
a mover for moving the first jaw, the first tray carrying the device, the second tray, and the second jaw into engagement with each other, said first tray associated with the first jaw and the second tray associated with the second jaw; and
a rotator for rotating the first and second jaws.
2 Assignments
0 Petitions
Accused Products
Abstract
Manufacturing lines include inspection systems for monitoring the quality of parts produced. Manufacturing lines for making semiconductor devices generally inspect each fabricated part. The information obtained is used to fix manufacturing problems in the semiconductor fab plant. A machine-vision system for inspecting devices includes a flipper mechanism. After being inspected at a first station, a tray-transfer device moves the tray from the first inspection station to a flipper mechanism. The flipper mechanism includes two jaws, a mover, and a rotator. The flipper mechanism turns the devices over and places the devices in a second tray so that another surface of the device can be inspected. A second tray-transfer device moves the second tray from the flipper to a second inspection station. The mover of the flipper mechanism removes the tray from the first inspection surface and places a tray at the second inspection surface.
89 Citations
36 Claims
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1. A machine-vision system for inspecting a device, the device having a first side and a second side, the machine-vision system comprising:
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a first inspection station for inspecting a first side of a device; a second inspection station for inspecting a second side of a device; and a tray-transfer mechanism that operates to move the device in a tray, the tray having a height, a long-dimension side and a short-dimension side, from the first inspection station to the second inspection station in a direction substantially perpendicular to the long-dimension side, wherein the short dimension side is shorter than the long dimension side and longer than the height, and wherein the tray-transfer mechanism further includes an inverting mechanism that operates to invert the device so that the first side of the device can be inspected at the first inspection station and the second side of the device can be inspected at the second inspection station, wherein the inverting mechanism further comprises a mechanism for flipping the devices carried in a tray, the mechanism further comprising; a first jaw having a surface for receiving a first tray; a second jaw having a surface for receiving a second tray; a mover for moving the first jaw, the first tray carrying the device, the second tray, and the second jaw into engagement with each other, said first tray associated with the first jaw and the second tray associated with the second jaw; and a rotator for rotating the first and second jaws. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A machine-vision system for inspecting a plurality of devices positioned within a plurality of device-carrying trays, the machine-vision system comprising:
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a first tray adapted to carry a plurality of devices, the first tray having a height, a length side and a width side, wherein the length side is longer than the width side and the height is shorter than the width side; a second tray adapted to carry a plurality of devices; a flip station for flipping the plurality of devices carried in a first tray from a first inspection position in the first tray to a second inspection position in the second tray wherein the flip station further comprises; a first jaw having a surface for receiving a first tray; a second jaw having a surface for receiving a tray; a mover for moving the first jaw, a first tray having a plurality of devices, a second tray, and the second jaw into engagement with each other, said first tray associated with the first jaw and the second tray associated with the second jaw; and a rotator for rotating the first and second jaws; and a mover that moves the first tray into and out of the flip station in a direction substantially perpendicular to the length side of the first tray. - View Dependent Claims (13, 14, 15, 16, 17, 18)
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19. A flipping mechanism for transferring a plurality of devices from a position in a first tray to a position in a second tray, the flipping mechanism comprising:
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a first jaw having a surface adapted to receive the first tray; a conveyor that moves the first tray to the first jaw in a direction substantially parallel to a shortest side dimension of the first tray; a second jaw having a surface adapted to receive the second tray; a mover for moving the first jaw, the first tray, the second tray, and the second jaw into engagement with each other, said first tray associated with the first jaw and the second tray associated with the second jaw; and a rotator for rotating the first and second jaws. - View Dependent Claims (20, 21, 22)
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23. A method for acquiring physical information associated with a plurality of devices placed in a tray, the tray having a height, a length side and a width side, wherein the height is shorter than the width side and the width side is shorter than the length side, the method comprising the steps of:
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inspecting a first side of a device within a first tray; moving the first tray in a direction substantially parallel to the width side of the first tray; moving a second tray to a position near the first tray; flipping the first tray and second tray to move the device from the first tray to the second tray and place the device in the second tray so that a second side of the device is presented in the second tray; and inspecting a second side of the device within the second tray. - View Dependent Claims (24)
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25. A machine-vision system for inspecting a device, the device having a first side and a second side, the machine-vision system comprising:
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a first inspection station for inspecting a first side of a plurality of devices; a second inspection station for inspecting a second side of the plurality of devices; a tray-transfer device that operates to move the devices in a tray from the first inspection station to the second inspection station, said tray-transfer device further including an inverting mechanism that operates to invert the devices so that the first side of the devices are inspected at the first inspection station and the second side of the devices are inspected at the second inspection station, wherein the inverting mechanism further comprises a mechanism for flipping the devices carried in a tray, the mechanism further comprising; a first jaw having a surface for receiving a first tray; a second jaw having a surface for receiving a second tray; a mover that moves the second jaw such that the second tray comes into engagement with the first tray, said first tray associated with the first jaw and the second tray associated with the second jaw; and a rotator for rotating the first and second jaws; and a pick-and-place mechanism that removes rejected devices that fail an inspection at the first or second inspection station from the second tray and replaces the removed devices with good devices that passed inspection, in order to achieve an all-good tray of devices. - View Dependent Claims (26, 27)
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28. A machine-vision system for inspecting a plurality of tray-held devices, each device having a first side and a second side, the machine-vision system comprising:
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a first inspection station for inspecting a first side of the devices held in a single layer in a tray that has a long-dimension side and a short-dimension side, wherein the long-dimension side is longer than the short-dimension side; a second inspection station for inspecting a second side of the devices; and a tray-transfer device that operates to invert the devices and move the devices from the first inspection station to the second inspection station in a direction substantially perpendicular to the long dimension side of the tray. - View Dependent Claims (29, 30)
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31. A machine-vision system for inspecting a plurality of tray-held devices, each device having a first side and a second side, the machine-vision system comprising:
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a first inspection station for inspecting a first side of the devices held in a tray that has a long-dimension side and a short-dimension side that is shorter than the long-dimension side; a second inspection station for inspecting a second side of the devices; and means for inverting the devices and moving the devices from the first inspection station to the second inspection station in a direction substantially perpendicular to the long dimension side of the tray. - View Dependent Claims (32, 33)
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34. A machine-vision system for inspecting a plurality of tray-held devices, each device having a first side and a second side, the machine-vision system comprising:
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a first inspection station for inspecting a first side of the devices held in a tray that has a long-dimension side and a short-dimension side that is shorter than the long-dimension side; a second inspection station for inspecting a second side of the devices; and means for inverting the devices and moving the devices from the first inspection station to the second inspection station in a direction not parallel to the long dimension side of the tray. - View Dependent Claims (35, 36)
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Specification