Image Sensor (Scanner)


Image Scanner 2.jpg
Image Sensor (Scanner)
An Image Scanner converts images that have been scanned optically into digital images. Typical Image Scanners available in the current market are either Charge-coupled Device (CCD) or Contact Image Sensor (CIS) where lights is predominantly used to capture the image by passing the images to be scanned over an array of sensors with Red, Green and Blue filters or LEDs.
Most of the Image Scanner device is die-attached with a row of CCD (usually 15 dies) and a TG die. The CCD dies are attached at pre determined position to ensure that there is no distortion or noise to the scanned image.
Image Scanners are usually assembled in BT resin substrate format and usually comes in 5 rows or 6 rows of panels within one substrate. Bonding layout between indexes are different which requires a different method in programming the wire bonder to bond the substrate successfully. A substantial amount of resources have been utilized to understand and developed some of the key differentiating features required in this market.
Key features developed:
  • Flexible Device Matrix Bonding to allow the teaching of the bond program to recognize the different layouts of the scanning dies; offline iterations required to be done to map out the indexing sequences against the bonding layout requirements;
  • Multiple Bond Program which allows the master bond program consisting of different subset of bond programs matching the bonding layouts at different indexing to reduce the set-up time; under development
  • Die Gap Inspection to inspect the gap between the scanning dies (in X and Y directions) and skip the panels in case of rejects being detected to cut down on wastages of gold wires; under development
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