4IN1-SPAD

High sensitivity photodetectors can detect individual photons at extremely low light intensities and record the arrival time of photons with picosecond level time accuracy. They are widely used in low light imaging, time-of-flight measurement, fluorescence microscopy, and other fields, providing unprecedented high sensitivity and high-precision measurement capabilities.

Group Business AI Chip Semiconductor

Introduction to SPAD (Single Photon Avalanche Diode) Fundamentals

Why Single Photon?

The eyes are sensitive to intensity and color (wavelength)
But There Are more
Think about collecting each photon:
→ Position
→ Direction
→ Imaging
→ Wavelength
→ Time

*By using single photon sensing and imaging, more dimensions can be added to the measured information space

Basic knowledge of SPAD (Single Photon Avalanche Diode)

Example of A Single Photon

→ Low Light Imaging
→ Flight Time (Single Point, Imaging)
→ Fluorescence Microscope
→ Quantum Physics (Entangled Photons)
→ Quantum Communication
→ Rapid Optical Event
→ Biomedical Imaging (PET)
→ High-Energy Physics
→ Quantum Random Number Generation

How To Create A SPAD In CMOS

Reduced SPAD in CMOS must coexist with circuit design rules
The first goal when designing a SPAD

·Create a node to apply high domain
·Prevent premature edge rupture (protection)

We will utilize the SPAD cell profile provided by the foundry

·DBHitek， Global foundries support the use of third-party SPAD

4IN1-SPAD: The Next Milestone

3IN1-SPAD: Enable Night Vision Function

We have been testing SPAD cells for 3 years now
(Including several domestic companies: Party B, Party B)

SPAD imaging is better for artificial intelligence tasks
than sCMOS and thermal sensitive phase machines.

3IN1 Depth: Enable Depth

At present, we have started this research project: extending r search to customer electronic products

How to create a SPAD in CMOS

Fuzzy Capture Support

Deep learning models can provide wide-angle support
The deep learning model itself calibrates lens distortion, and even wide-angle distorted images can recognize flat letters, so the system can support short distances between cars and the system, and multiple detections with a wide camera system.
No hacker attacks (non hackable)
Usually, the license plate number system uses OCR for text recognition, but sometimes it recognizes "code text" so that hackers can access the internal database (real story).

How to create a SPAD in CMOS

3IN1-SPAD: Enable Night Vision Function

Ultra low light night vision goggles used for night combat operations.
Night micro combat unmanned aerial vehicles.
Unmanned ground vehicles (UGVs) at night.

4IN1-SPAD

Introduction to SPAD (Single Photon Avalanche Diode) Fundamentals