Is the identity of Xperia 1 V’s “double low noise sensor” a two-layer transistor pixel stacked CMOS | Smartphone digest

Last night, a huge billboard billboard of Xperia 1 V was suddenly found in the city of Hong Kong.

As a result, the official render image of the pre-announcement Xperia 1 V has leaked in an unusual way.

On the other hand, this image also contains text that seems to be related to the new functions around the camera of the Xperia 1 V.“Next generation double low noise sensor”So that means.

I think there is no doubt that this is a new sensor that can reduce noise, but it is unknown what it is specifically.

However, there is no doubt that this will be the “world’s first” technology that will be the selling point of the Xperia 1 V, as it will be written on the promotional signboard like this.

And this time, interesting information about this mysterious “double low noise sensor” was posted on Reddit.

I’m sure Next-generation double low-noise sensor is 2-Layer Transistor Pixel introduced in late 2021

According to this post,The identity of the “double low noise sensor” is the “two-layer transistor pixel stacked CMOS sensor technology” announced by Sony at the end of 2021.That’s what it is.

What is 2-layer transistor pixel stacked CMOS sensor technology?

Two-layer transistor pixel stacked CMOS sensor technology is a camera sensor technology that Sony Semiconductor Solutions announced in December 2021 that it had successfully developed.

Photodiodes and pixel transistors, which were conventionally formed on the same substrate, are formed and stacked on separate substrates, ensuring about twice the amount of saturation signal compared to conventional models, expanding the dynamic range and reducing noise. Dramatically improved imaging characteristics

From Sony Semiconductor Solutions news release

In short, by making the photodiode and image transistor, which were conventionally arranged side-by-side, into a two-layer structure, the area previously occupied by the pixel transistor can now be allocated to the photodiode as well. Achieving a saturation signal level and expanding the dynamic range.

resulting in,Significantly increases the amount of light received, leading to noise reductionit seems that

Then, it seems that the “double” in this “double low noise sensor” means two layers.

Also, at least there is no smartphone camera that has implemented this sensor so far, and it is natural if this “double low noise sensor” of Xperia 1 V = 2 “layer transistor pixel stacked CMOS sensor”world’s firstSo.

This Xperia 1 V, at least regarding the camera, is a big upgrade, contrary to previous leaks and rumors.
Furthermore, it seems likely that it will be a model that can take pictures with image quality that is completely different from the conventional Xperia 1 series.