Resources Contact Us Home
Browse by: INVENTOR PATENT HOLDER PATENT NUMBER DATE
 
 
Method of manufacturing ball array devices using an inspection apparatus having two or more cameras and ball array devices produced according to the method










Image Number 14 for United States Patent #7653237.

A calibration and part inspection method for the inspection of ball grid array, BGA, devices. Two cameras image a precision pattern mask with dot patterns deposited on a transparent reticle. The precision pattern mask is used for calibration of the system. A light source and overhead light reflective diffuser provide illumination. A first camera images the reticle precision pattern mask from directly below. An additional mirror or prism located below the bottom plane of the reticle reflects the reticle pattern mask from a side view, through prisms or reflective surfaces, into a second camera and a second additional mirror or prism located below the bottom plane of the reticle reflects the opposite side view of the reticle pattern mask through prisms or mirrors into a second camera. By imaging more than one dot pattern the missing state values of the system can be resolved using a trigonometric solution. The reticle with the pattern mask is removed after calibration and the BGA to be inspected is placed with the balls facing downward, in such a manner as to be imaged by the two cameras. The scene of the part can thus be triangulated and the dimensions of the BGA are determined.








 
 
  Recently Added Patents
Liposomal nanoparticles and other formulations of fenretinide for use in therapy and drug delivery
Method and apparatus for storing email messages
Method and apparatus of motion vector prediction with extended motion vector predictor
Semiconductor device manufacture in which minimum wiring pitch of connecting portion wiring layer is less than minimum wiring pitch of any other wiring layer
Motorized home appliance door
Regenerative power storage system mounted on DC electric railway car
Visual indicator of online backup
  Randomly Featured Patents
Production system and an associated index device for use as a reference feature
Facer for insulation boards and other construction boards
Method for integrating plug-in security panel module with network interface middleware
Integrated anastomosis tool with graft vessel attachment device and cutting device
Remote control switch
Shutoff control apparatus for a conveyor
Paint mixer brush attachment
Cellulose ethers containing butenyl groups and use thereof as protective colloids in polymerizations
Method for determination of the transverse relaxation time T2* in MR data
Lupus antibodies for passive immunotherapy of HIV/AIDS