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Canon Patent Application: BSI DPAF Sensor mentioned
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Canon Patent Application: BSI DPAF Sensor mentioned

In this patent application which describes methods of manufacturing and various sensor embodiments, the second last embodiment illustrates a back side illuminated sensor.

Much has been made over Sony's BSI (back side illuminated) sensors, and I'm sure Canon is certainly researching making their own.  BSI sensors have efficiency gains not found in normal sensors.  They are also much better in mirrorless cameras because the light doesn't have to penetrate as deep into the sensor, and mirrorless cameras have a higher angle of incidence of light hitting the sensor near the corners.

US Patent Application 20190035827

 

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How to view Japan Patent applications.

Unfortunately, there's no direct way of linking to the patent application (sad!) however, this is the easiest process to view a japan patent or application.

  1. Go to the Japan Patent Office search page.
  2. If it's a patent application (they are usually in the format of Year-Number ie: 2017-011300) then type the patent application number into the second field down from the top where it says publication of patent application. 
  3. Click on search.
  4. Then click on the patent application number link, and there's the patent application!

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