Friday, August 24, 2007

Micron 1.75um Pixel Reverse Engineering

For the first time Chipworks openly publishes poly and diffusion-level picture of Micron's 1.75um pixel:



This is the old pixel from MT9E001 8MP sensor. It mostly inherits the first generation 2.2um layout, just shrinked down a little. More recent Micron pixels are supposed to improve its symmetry.

4 comments:

  1. It is different they have shallow trench isolation in the vertical direction between diode

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  2. Thank you for the information. Are the transfer gates and diffusions still shared in the second generation pixel?

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  3. I did not see the second generation. Only the 2.2um pixel from MT9T012.

    I also have heard that is supposed to be more symmetrical ( at the IISW2007)

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  4. Yes, in 2.2um pixels Micron significantly improved symmetry in their 2nd generation.
    I expect reverse engineering of the 1.75um 2nd generation pixels to appear soon. We'll see what they were able to achieve.

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