Implantable Semiconductor Identification Chip With Oxide Transistors
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Solution Overview
Problem
Existing authentication devices using biological information face challenges with forgery resistance, changes due to injuries, diseases, or aging, and high power consumption.
Innovation Solution
A semiconductor device embeddable in a living body, comprising a communication, control, memory, and sensor portion, utilizing an oxide semiconductor transistor for low power computing and accurate identification, with a coating material to prevent reactions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If conventional transistors are used in the semiconductor device, then processing speed can be maintained, but power consumption increases
Solution Approach 1:
The patent changes the material parameter of the transistor from conventional semiconductor materials to oxide semiconductor materials. This material parameter change enables the transistor to operate with significantly lower power consumption while maintaining sufficient reliability for the authentication device application, as oxide semiconductors have inherently lower leakage currents and can operate at lower voltages.
Solution Approach 2:
The patent employs a composite structure combining oxide semiconductor materials with other functional materials in the transistor construction. This composite approach allows optimization of both power consumption and reliability by leveraging the advantageous properties of different materials in different layers or regions of the transistor structure.
2Volume of moving object
If the semiconductor device is made smaller for embedding, then it can be implanted in living bodies, but manufacturing precision requirements increase
Solution Approach 1:
The patent divides the semiconductor device into distinct functional segments including sensor portion, arithmetic portion, control portion, and communication portion. Each segment can be independently optimized and manufactured, which simplifies the overall manufacturing process despite the small device volume required for implantation.
Solution Approach 2:
The patent utilizes three-dimensional integration and stacking of functional layers to reduce the planar footprint of the device. By arranging components in multiple dimensions rather than a single plane, the device achieves compact volume suitable for implantation while maintaining manufacturable dimensions and tolerances.
3Measurement precision
If biological information is used for authentication, then identification accuracy improves, but the device becomes vulnerable to changes due to injuries, diseases, or aging
Solution Approach 1:
The patent incorporates feedback mechanisms where the arithmetic portion continuously processes sensor information and compares it with stored reference data. This feedback loop allows the system to adapt to gradual changes in biological information due to aging or health conditions while maintaining accurate identification by recognizing patterns rather than requiring exact matches.
Solution Approach 2:
The patent performs preliminary registration of baseline biological information during a calibration phase before actual authentication begins. This preliminary action creates a reference profile that accounts for individual variations, enabling the system to later distinguish between normal biological changes and anomalous conditions that may indicate security concerns.
Data Source
AI summary
A semiconductor device that can be embedded in a living body is provided. The semiconductor device being embeddable in a living body includes a communication portion, a control portion, a memory portion, an arithmetic portion, and a sensor portion. The control portion has a function of controlling the communication portion, the arithmetic portion, and the memory portion. The memory portion has a function of retaining identification information. The arithmetic portion has a function of using first information and second information supplied from the sensor portion to generate third information. The control portion has a function of making the arithmetic portion perform arithmetic processing in response to a signal input through the communication portion. The control portion has a function of outputting, through the communication portion to the outside, one or both of the identification information and the third information, in response to a signal input through the communication portion. The arithmetic portion preferably includes a transistor including an oxide semiconductor in a channel formation region. The semiconductor device is preferably covered with a coating material.