News and discussions about image sensors
fwiw, that part number looks like that used for an asic (like the ov529) used w/ a ov76XX series vga camera cube. there's no ov531AF on ovt's website.ek
Mask IDs are selected by design engineers completely independent of product/marketing part numbers.
Hey, a picture of a pixel array that looks black. Yay!
Yes, but if it was glowing or had a watermark of Elvis, then we'd really have something to talk about.
What is the small rectangle just below the pixel array??? AF pixels??
AF pixels are likely given the ov531AF name
A few remarks :- to Eric : the darker the imaging field, the higher the absorption of the light or the higher the QE. So that is a good sign !- I am not really a fan of Elvis, so even a watermark of him would not motivate me to talk about it. Guess who's watermark would make me talk ?- autofocus pixels are included inside the array, outside the array autofocus pixels make no sense.
If we assume the digital portion is below the array, the rectangle might contain laser fuses to configure or program something during the testing time. I would rather place them closer to the chip edge, but may be Omnivision had some reason to put it where it is.
it could be a dedicated array of pixel for some functions. probably do not have CF on itit's a VGA does not make sense to have AF. AF might be revision?
AT: Yes, my comment dates from an old discussion Junichi Nakamura and I had about pictures of image sensor chips. The imaging area was always shown full of "diffraction grating color" instead of black. So, I was seriously happy about the pixel array being shown as black for just the reasons you say. Of course, it is not a pic from the manufacturer so maybe that is why it is black. Watermarks - hmmm, there is more to the picture than meets the eye. hey hey my my.
Wait a minute, what is the package method of this chip? Seeing from the side of the pic, is it Wire-bonding? Can't believe it is not CSP/TSV...
Interesting observation, indeed. Omnivision was the early adopter of wafer scale packaging. Me too surprised to see it wire-bonded.
"I am not really a fan of Elvis, so even a watermark of him would not motivate me to talk about it. Guess who's watermark would make me talk ?"Neil Young?
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