Elastomeric Polymer Encapsulation for Implantable Biosensor Flexibility
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Solution Overview
Problem
Traditional biosensors are rigid, causing tissue damage upon implantation, limiting implant locations, and exposing components to biological defenses, leading to performance limitations and deterioration.
Innovation Solution
An implantable biosensor package with a semiconductor substrate and processor embedded within a protective elastomeric polymer layer, providing flexibility and protection from biological defenses, and incorporating chemical delivery systems for tissue manipulation and monitoring.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional rigid biosensors are implanted into tissue, then biosensing function is achieved, but tissue damage occurs and implantation locations are limited
Solution Approach 1:
The patent applies this principle by encapsulating the rigid biosensor chip within a flexible polymer layer. The polymer layer conforms to tissue surfaces and flexes with tissue movement, eliminating mechanical mismatch damage while protecting the underlying rigid sensor components. This allows the biosensor to maintain its sensing function while being compatible with soft tissue environments.
Solution Approach 2:
The patent combines rigid semiconductor biosensor components with flexible polymer materials to create a composite structure. The polymer layer provides mechanical compliance and biocompatibility, while the embedded semiconductor chip provides precise sensing functionality, achieving both tissue compatibility and reliable biosensing.
2Reliability
If traditional rigid biosensors are used, then biosensing capability is provided, but implantation location options are limited
Solution Approach 1:
The flexible polymer encapsulation allows the biosensor to be implanted on curved or irregular tissue surfaces rather than requiring flat, rigid implantation sites. The polymer layer adapts to various anatomical locations including skin surfaces, organ capsules, and other curved tissue interfaces, greatly expanding implantation options.
3Reliability
If biosensor components are exposed to biological defenses, then sensing function operates, but performance deteriorates and reliability decreases
Solution Approach 1:
The polymer layer serves as an intermediary barrier between the biosensor components and the biological environment. It protects sensitive electronic and semiconductor components from direct exposure to immune cells, proteins, and other biological defenses while still allowing sensor signals to pass through for detection.
Solution Approach 2:
The polymer encapsulation creates a biologically inert environment around the sensor components, isolating them from reactive biological substances such as enzymes, antibodies, and immune cells that would otherwise degrade or disable the sensing function.
4Object-affected harmful factors
If polymer encapsulation is applied to protect biosensor, then tissue compatibility improves, but device complexity increases
Solution Approach 1:
The polymer encapsulation is implemented as a thin-film structure that provides comprehensive protection and tissue compatibility without adding substantial bulk or complexity. The thin-film approach maintains device miniaturization while delivering the mechanical compliance and biological barrier functions needed for successful implantation.
Data Source
AI summary
Techniques regarding an implantable biosensor package are provided. For example, one or more embodiments described herein can regard an apparatus, which can comprise a biosensor module. The biosensor module can comprise a semiconductor substrate and a processor. The semiconductor substrate can have a sensor operably coupled to the processor. The apparatus can also comprise a polymer layer. The biosensor module can be embedded within the polymer layer such that the polymer layer can be provided on a plurality of sides of the biosensor module.