CCD versus CMOS in Traffic Applications

For intelligent traffic systems, VGA resolution CCD-based cameras have traditionally been the accepted technology, but with the quality of CMOS image sensors continuously improving, CMOS-based cameras are now a viable option for demanding license plate recognition applications.  The latest system requirements are for higher resolution (HDTV) and frame rates of 30 to 60 frames per…

Machine Vision Camera Requirement for Semiconductor Wafer Thickness and Flatness Measurements

Before any transistor is laid down, the incoming silicon wafer must be analyzed for flatness and defects.  From this inspection, wafers can be classified to allow the best wafers to be used for the smallest technology node.  Typically measurement techniques such as interferometry are used for this.  Extremely stable cameras with low noise are needed…

Ways to increase throughput in semiconductor and electronics inspection

The constant challenge in semiconductor and electronics manufacturing is to increase throughput while also increasing accuracy with shrinking dimensions.  This means in-line inspection and metrology systems must provide 100% analysis at a high precision while maintaining high throughput.  The latest innovations in ultra high-resolution image sensors and subsequent cameras support these goals.  High resolution, high-speed…