COMPONENT MOUNTER

• US 20160100089A1
• Filed: 05/13/2013
• Published: 04/07/2016
• Est. Priority Date: 05/13/2013
• Status: Active Grant

• Current Assignee: Fuji Company Limited
• Original Assignee: Fuji Machine Manufacturing Company Limited
• Inventors: NOZAWA, Tatsuji
• Granted Patent: US 10,250,815 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: G01N 2021/95646 Soldering
• CPC Class Codes: G01N 21/93 Detection standards; Calibrating baseline adjustment, drift correction
• CPC Class Codes: G01N 21/956 Inspecting patterns on the surface of objects contactless testing of electronic circuits G01R31/308; testing currency G07D; manufacturing processes per se of semiconductor devices implementing a measuring step H01L22/10
• CPC Class Codes: G06T 2207/30152 Solder
• CPC Class Codes: G06T 7/0004 Industrial image inspection
• CPC Class Codes: H04N 23/73 by influencing the exposure time
• CPC Class Codes: H05K 13/0817 Monitoring of soldering processes inspection of solder joints or of printed solder paste G01N21/95684

Abstract

Component mounter includes a transfer inspection device that inspects the transfer state of solder by imaging the bottom surface of a component, and a transfer inspection data creation device that creates transfer inspection data. The transfer inspection data creation device performs imaging of the bottom surface of a pre-transfer component with a camera at multiple shutter speeds, acquires the multiple pre-transfer images of different shutter speeds, obtains pre-transfer bump portion pixel values, performs imaging of the bottom surface of a post-transfer component with the camera at the same multiple shutter speeds, acquires the multiple post-transfer images of different shutter speeds, obtains post-transfer bump portion pixel values, and determines the shutter speed to be used when performing transfer inspection based on the post-transfer bump portion pixel values. Transfer inspection data is created based on the pre- and post-transfer bump portion pixel values of images captured at the determined shutter speed.

Claims

1. A component mounter provided with a transfer inspection device that inspects the transfer state of a fluid, which is one of solder, flux, conductive paste, or adhesive, which has been transferred onto the bumps on the bottom surface of a component by imaging the bottom surface of the component held by a suction nozzle with a camera and performing image recognition, comprising:

a transfer inspection data creation device that creates transfer inspection data used when inspecting the transfer state of the fluid,

wherein the transfer inspection data creation device includes

an image processing means that performs imaging with the camera of the bottom surface of the component being held by the suction nozzle before the fluid has been transferred to the bumps on the bottom surface of the component at multiple shutter speeds, then acquires the multiple pre-transfer images captured at different shutter speeds, and determines the pixel values of the pre-transfer bump portions by performing gray processing on each pre-transfer image, and that also performs imaging with the camera of the bottom surface of the component after the fluid has been transferred to the bumps on the bottom surface of the component at the same multiple shutter speeds as pre-transfer, then acquires the multiple post-transfer images captured at different shutter speeds, and determines the pixel values of the post-transfer bump portions by performing gray processing on each post-transfer image;

a shutter speed determining means that determines the shutter speed used for inspection of the transfer state based on the pixel values of the post-transfer bump portions; and

a transfer inspection data creation means that creates the transfer inspection data based on the pixel values of the post-transfer bump portions of the image captured with the shutter speed determined by the shutter speed determining means.

2. The component mounter according to claim 1, wherein the shutter speed determining means determines the shutter speed as the minimum shutter speed from the shutter speeds for which the minimum value for the pixel values of the post-transfer bump portion for the captured images was equal to or larger than a predetermined value.

3. The component mounter according to claim 1, wherein the transfer inspection data creation means calculates an intermediate value between the minimum value of the pixel values of the pre-transfer bump portion and the maximum value of the pixel values of the post-transfer bump portion of the images captured at the shutter speed determined by the shutter speed determining means to be used as transfer-recognition-use transfer inspection data,

and the transfer inspection device uses the transfer-recognition-use transfer inspection data as a threshold value for determining fluid transfer portions and fluid non-transfer portions.

4. The component mounter according to claim 1, wherein the transfer inspection data creation means calculates a value which is smaller than the minimum value of the pixel values of the post-transfer bump portion of the image captured at the shutter speed determined by the shutter speed determining means by a predetermined value as image-processing-error-determination-use transfer inspection data,

and the transfer inspection device uses the image-processing-error-determination-use transfer inspection data as a threshold value for determining image processing errors.

5. The component mounter according to claim 1, wherein the transfer inspection data creation device, in cases in which production is performed using components onto which fluid is transferred, creates the transfer inspection data when the transfer inspection data has not been created.

6. The component mounter according to claim 1, wherein the transfer inspection data creation device recreates the transfer inspection data when the transfer inspection device determines that a transfer defect or image processing error has occurred during production using a component onto which fluid is transferred.