Generic Power Pte Ltd

Hak Wee Tang

Ruini Cao

Yong Joo Puah

Zin Oo Thant

Kok Yeow Lim

Xulei Yang

Fan Hua

Soon Poo Teo

The present invention includes a system and method for three-dimensional imaging and analysis of electronic components. Specifically, it permits rapid and reliable inspection of the lead foot angle in integrated circuit packages. A first image capturing device, a second image capturing device and a third image capturing device are arranged in a 'corner shape' or 'L-shape.' The first image capturing device forms the corner and obtains an image of the bottom of the component. The perspective viewing angle of the second image capturing device and the perspective viewing angle of the third image capturing device are orthogonal to each other to allow accurate three-dimensional reconstruction of the lead angles and detection of flaws or bends.

System and method for lead foot angle inspection using multiview stereo vision

A method and apparatus for determining coplanarity of three-dimensional features on a substrate comprises a support for an object to be inspected in an object plane, a light source for illuminating the object, a first image capturing device having a first sensor and a first tiltable lens, a second image capturing device having a second sensor and a second tiltable lens, and an image processor to determine the coplanarity. Each tiltable lens is movable from a first variable angle to a second variable angle, with respect to its sensor, so that the respective lens plane and its sensor plane substantially intersect at the object plane in accordance with the Scheimpflug principle and the respective image is in focus across the whole field of view and of uniform light intensity.

Method and apparatus for determining coplanarity in integrated circuit packages

A method for 3-dimensional vision inspection of objects, such as microelectronic components, which have protrusions as features to be inspected, such as input/output contact balls, is disclosed. The method comprises the steps of determining interior and exterior parameters of a stereo camera system, forming a rectified stereo camera system with a rectified camera coordinate system from the parameters of the stereo cameras determined above. A pair of images of the object having a plurality of co-planar protrusions on one surface is captured by the stereo cameras system and is transformed into the rectified coordinate system to form a pair of rectified images. Conjugate points of each protrusion are then determined in the rectified images for the measurement of its location, co-planarity and height. Various configurations of the apparatus for capturing the images and processing the image data are also disclosed.

Method and apparatus for 3-dimensional vision and inspection of ball and like protrusions of electronic components

There is disclosed an inspection system that combines 2-D inspection and 3-D inspection of the components of an electronic device into one compact module. The inspection system of the present invention comprises a 2-D image acquisition assembly for inspecting 2-D criteria of the components, a 3-D image acquisition assembly for inspecting 3-D criteria of the components, and a computer for control and data analyzing. The 3-D image acquisition assembly comprises a 3-D image sensor and a 3-D light source. The 3-D light source is preferably a laser capable of generating a planar sheet of light that is substantially perpendicular to the inspection plane of the electronic device. The 2-D image acquisition assembly comprises a 2-D sensor and a 2-D light source positioned above the holder. The 2D and 3D image acquisition assemblies are arranged so that the 2D inspection and 3D inspection can be done while the electronic device is being held in one location.

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Singapore, Singapore

Hak Wee Tang