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
Modified and stabilized GDF propeptides and uses thereof
Switchable solvents and methods of use thereof
Restore software with aggregated view of content databases
Optical article comprising a temporary anti-fogging coating with improved durability
Article based on a composition containing a crosslinked blend of elastomers
Methods and systems for presenting an inhalation experience
Simulating non power of two texture behavior
  Randomly Featured Patents
Differential pressure operated electrical switch construction and method of making the same
Optical fiber for optically coupling a light radiation source to a multimode optical waveguide, and method for manufacturing it
Romp of functionalized cyclic olefins using ruthenium and osmium carbene complexes
Converting physical machines to virtual machines
Sorption device for heating and cooling gas streams
Hermetically sealed electrical apparatus
Aqueous emulsion copolymers, more especially in water-and oil-dilutable form, for improving the flow properties and pour point depression of crude oils and petroleum fractions and their use
Method, system, and program product for optimizing monitoring and discovery services for a grid computing environment
Vehicle full park engagement apparatus
Filter, coherent receiver device and coherent receiving method