18260674. PHOTODETECTION DEVICE, ELECTRONIC DEVICE, AND DISTANCE MEASURING SYSTEM simplified abstract (Sony Semiconductor Solutions Corporation)
PHOTODETECTION DEVICE, ELECTRONIC DEVICE, AND DISTANCE MEASURING SYSTEM
Organization Name
Sony Semiconductor Solutions Corporation
Inventor(s)
Mutsumi Okazaki of Kanagawa (JP)
PHOTODETECTION DEVICE, ELECTRONIC DEVICE, AND DISTANCE MEASURING SYSTEM - A simplified explanation of the abstract
This abstract first appeared for US patent application 18260674 titled 'PHOTODETECTION DEVICE, ELECTRONIC DEVICE, AND DISTANCE MEASURING SYSTEM
Simplified Explanation
The patent application describes a photodetection device with a pixel array unit on a semiconductor substrate to detect light, with each pixel surrounded by a separation wall, a photoelectric conversion unit to generate electric charge, a multiplication region to multiply the charge, and reflective portions to reflect light back into the substrate.
- Pixel array unit on semiconductor substrate for light detection
- Pixels separated by walls, with photoelectric conversion unit and multiplication region
- First reflective portion protrudes towards pixel center on receiving surface
- Second reflective portion on opposite surface reflects light back into substrate
Potential Applications
- Surveillance cameras
- Medical imaging devices
- Optical sensors
Problems Solved
- Improved light detection efficiency
- Reduction of crosstalk between pixels
- Enhanced signal-to-noise ratio
Benefits
- Higher sensitivity to light
- Increased image quality
- Lower power consumption
Original Abstract Submitted
A photodetection device is provided which includes a pixel array unit including a plurality of pixels arranged in a matrix on a semiconductor substrate to detect light, in which each of the pixels includes a pixel separation wall that surrounds the pixels and separates the pixels from one another, a photoelectric conversion unit inside the semiconductor substrate to generate an electric charge by light, a multiplication region inside the semiconductor substrate to multiply the electric charge from the photoelectric conversion unit, and first and second reflective portions that reflect light traveling toward outside the semiconductor substrate into the semiconductor substrate, the first reflective portion is provided, on a first surface that receives light of the semiconductor substrate, to protrude from the pixel separation wall toward a pixel center, and the second reflective portion is provided on a second surface of the semiconductor substrate facing the first surface.
