Title : Samsung and Omnivision's Race to the Bottom
link : Samsung and Omnivision's Race to the Bottom
Samsung and Omnivision's Race to the Bottom
IEEE Spectrum has published an article about a race towards the smallest pixel size. The article is titled "Samsung and Omnivision Claim Smallest Camera Pixels" where both companies have claimed to achieve ~0.6 micron pixel pitch for their CMOS image sensors.
Last month, two companies said they have reached the next stage in shrinking the pixels on CMOS camera chips. Both Santa Clara-based Omnivision and South Korea's Samsung claimed pixels with a pitch of just 0.56 micrometers (measured from the center of one pixel to the center of the next), which is about as large as the wavelength of green light.
One challenge with such shrinking pixel sizes is the well capacity. The article continues...
Samsung's 0.64-micrometer device can hold the equivalent of 6000 electrons ... . Shrink that area down to 0.56 micrometers without changing anything and you're left with only 3400.
Another challenge is crosstalk...
Seeking to strengthen the barrier against stray light... Samsung went to the extreme—an air gap.
...there will be even tinier pixels in the future.
... Samsung engineers went on to add.
Where are we headed? Where will this race end? Are we converging towards single-photon cameras pixels with ultra-low well capacities of a single-digit photo-electrons?
Full article here: https://spectrum.ieee.org/cmos-image-sensor-pixel
[Text in italics is verbatim from the original article. Text not in italics are this blog post author's comments and musings.]
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