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Canon continues to work on stacked BSI sensors
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Canon continues to work on stacked BSI sensors

In another patent application describing stacked BSI sensors, canon looks to solve problems with high melting point metal is moved from being on the sensor substrate to only on the peripheral circuit substrate.  They are concerned that the high melting point metal will diffuse into the photo diodes collecting image data.

There is clearly a trend that Canon is looking to solve what they feel are issues with stacked BSI sensors, and certainly because they plan on actually implementing them one day.  Of course there's no timeframe for this, it could take years, or Canon could be rolling them out this year. 

There's no doubt about it that especially for mirrorless, stacked and BSI sensors are very important.  Firstly because of the performance, and secondly because it improves the ability to collect light at high incident angles.


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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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