Implantable Biosensor Package Using Rolled Cylindrical Circuit

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Solution Overview

Problem

Existing body-implantable sensed-data processing technologies face challenges in miniaturization and volume reduction, making them less invasive and more versatile for real-time physiological data processing and analysis within the human body.

Innovation Solution

A body-implantable package comprising a tube, a cover, a chip, and a strained layer, where the chip is rolled into a cylindrical circuit and the strained layer is affixed to the chip, allowing for a compact design with a wireless communication circuit and optional battery or sensor integration, enabling easy insertion and adjustable volume.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Volume of moving object

If the chip is rolled into a cylindrical circuit to reduce volume, then the volume of the sensed-data processor is decreased, but the ease of manufacture becomes more difficult

Engineering Contradiction:

Improvevolume of sensed-data processorVSAvoidease of manufacture

Core Design Contradiction:

Volume of moving objectVSEase of manufacture

Solution Approach 1:

The chip is rolled into a cylindrical circuit configuration, transforming the flat chip structure into a curved three-dimensional form. This curvature enables compact volume reduction while maintaining the functional integrity of the circuit traces and components through careful design of the rolling radius and chip layout patterns.

Inventive Principle:

Principle #14Spheroidality (Curvature)

Solution Approach 2:

The rolled chip is nested within a cylindrical package housing, with the strained layer wrapped around the chip in a concentric manner. This nested arrangement maximizes space utilization and achieves minimal volume while protecting the delicate rolled circuit structure.

Inventive Principle:

Principle #7Nested doll (Nesting)

2Reliability

If the chip and strained layer are spaced apart from the inner surface of the tube to reduce contact, then the reliability of the package is improved, but the device complexity increases due to the need for positioning structures

Engineering Contradiction:

Improvereliability of packageVSAvoiddevice complexity

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

A strained layer is introduced as an intermediary between the chip and the tube inner surface. This strained layer serves multiple functions: it provides mechanical support to the rolled chip, maintains the spacing between the chip and tube wall, and protects the delicate circuit traces from direct contact with the tube surface, thereby improving reliability without requiring complex positioning structures.

Inventive Principle:

Principle #24Intermediary (Mediator)

3Object-affected harmful factors

If the chip is rolled into a cylindrical circuit to decrease volume, then the invasive nature of implantation is reduced, but the ease of operation during insertion becomes more difficult

Engineering Contradiction:

Improveinvasive nature of implantationVSAvoidease of operation during insertion

Core Design Contradiction:

Object-affected harmful factorsVSEase of operation

Solution Approach 1:

The rolled chip structure is designed with controlled flexibility through the strained layer, allowing it to dynamically adapt during insertion. The structure can flex and deform to pass through the insertion catheter, then maintains its rigid cylindrical form once deployed in the target location, reducing invasiveness while facilitating ease of operation during the insertion process.

Inventive Principle:

Principle #15Dynamics

Data Source

PatentUS10105102B2Package for processing sensed-data, sensed-data processor, and system for processing sensed-data

Publication Date: 2018.10.23 SAMSUNG ELECTRONICS CO LTD

AI summary

Provided is a body-implantable package for processing biosensed-data for wireless communication to an external device. The package includes a tube closed by a cover, therein, a chip with a strained layer affixed thereto to form a flexible laminar circuit. The cover is fitted over an open end of the tube after the laminated chip and strained layer are inserted therein. The chip is constructed of and rolled in one or more turns into a generally cylindrical shape. The strained layer is affixed to a surface of the chip automatically to cause the flexible laminar circuit to curl into a generally cylindrical shape to fit within the tube.