NIT releases 7.5µm pitch SWIR sensor through stacking tech

Share this on social media:

French firm New Imaging Technologies has joined the effort to produce SWIR image sensors with smaller pixels.

NIT has released several SWIR sensors made with its in-house stacking technology, which is able to reduce the pixel pitch from 10µm down to 7.5µm. Products are currently under qualification, including an HD array (1,280 × 1,024 pixels) at 10µm pitch.

In 2019, Sony announced SWIR sensors with a 5µm pixel pitch, achieved by connecting the InGaAs photodiode to the readout circuit via copper-to-copper bonding. Then, late last year, Imec introduced its quantum dot SWIR sensor to add to the SWIR technologies available. Imec achieved a pixel pitch of 1.82µm.

Other firms like SWIR Vision Systems in the US and Qurv Technologies, a spin out of Spanish research institute ICFO, are working on quantum dot SWIR sensors and cameras.

NIT's stacking technology, named NH, is able to stack a photodiode array of InGaAs onto a CMOS read-out circuit at pixel level. The NH technology does not rely on the classical indium bump hybridisation technique, therefore improving the manufacturing yield and lowering the sensor cost.

NIT already supplies a VGA line of SWIR products with 15µm pitch. NIT says it has a roadmap to smaller pitches (5µm) and full HD formats.

Image: atdigit/

14 November 2022

Jyrki Rosenberg (left) and Tapani Ryhänen, Emberion’s CEO and CTO respectively. Credit: Emberion

24 January 2022

Hyperspectral imaging in the SWIR wavelength can be deployed aerially for crop health monitoring and providing humanitarian aid. (Image: Shutterstock/aappp)

03 March 2023

When combined with air drying, shortwave-infrared can be used to detect active dental cavities. This is possible because active cavities are porous and hold more water, which affects the infrared measurements around the affected area as the tooth dries. (Image: Chang et al.)

20 January 2023