Hermetic Implant Package With Transparent Coil Window Sealing
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Solution Overview
Problem
Hermetically sealed enclosures for implantable medical devices face challenges in maintaining stable electrical coupling while withstanding environmental factors, particularly in connecting transparent and opaque portions without causing material stress or requiring high-temperature brazing.
Innovation Solution
A hermetically sealed package design that uses low-temperature compression bonding techniques to connect weld rings to the transparent portion of the housing, allowing for the integration of an inductive coil and power source, and optionally includes biocompatible materials for implantation, enabling remote charging via RF electromagnetic radiation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If high-temperature brazing is used to connect opaque and transparent portions, then hermetic sealing is achieved, but material stress and structural integrity deteriorate
Solution Approach 1:
The patent changes the temperature parameter from high-temperature brazing to low-temperature compression bonding (below the glass transition temperature of the transparent portion). This allows hermetic sealing to be achieved without subjecting the materials to temperatures that would cause thermal stress, warping, or degradation of the transparent portion and surrounding materials.
Solution Approach 2:
The patent replaces the thermal field (brazing) with a mechanical field (compression bonding). Instead of using heat to create the hermetic seal, the invention applies mechanical compression force to bond the weld ring to the transparent and opaque portions, thereby avoiding thermal stress while achieving the same sealing function.
2Stability of the object's composition
If traditional hermetic sealing methods are used, then enclosure stability is achieved, but electrical coupling stability deteriorates
Solution Approach 1:
The patent introduces a separate weld ring component that is compression bonded to the transparent portion. This weld ring serves as an intermediate electrical connection element that maintains stable electrical coupling between the inductive coil and the external charging system, while the transparent portion itself remains structurally stable. The segmentation of the sealing function and electrical connection function into separate components allows both requirements to be satisfied simultaneously.
3Adaptability or versatility
If transparent portion is used for electromagnetic transmission, then inductive charging capability is improved, but hermetic sealing becomes more difficult
Solution Approach 1:
The patent introduces a weld ring as an intermediary component that is compression bonded to the transparent portion. This weld ring acts as a mediator that facilitates hermetic sealing of the transparent portion without requiring high-temperature processes that would compromise the transparent material. The intermediary weld ring allows the transparent portion to maintain its electromagnetic transmission properties while achieving reliable hermetic sealing through low-temperature compression bonding.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The solution provides a stable and stress-free electrical connection within the hermetically sealed package, enabling efficient inductive charging of implantable medical devices while maintaining biocompatibility and avoiding high-temperature bonding issues.
Implementation Method 1
At least one of the first and second opaque portions is hermetically sealed to the transparent portion by a weld ring... compression bonding the weld ring includes heating the weld ring, disposing the weld ring over the outer surface of the transparent portion of the housing, and cooling the weld ring
Implementation Method 2
compression bonding the weld ring includes heating the weld ring, disposing the weld ring over the outer surface of the transparent portion of the housing, and cooling the weld ring
Implementation Method 3
an inductive coil disposed at least partially within the transparent portion of the housing and electrically connected to the power source... an inductive charging system can be utilized to charge the power source via the inductive coil
Data Source
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Figure 3
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AI summary
Various embodiments of a hermetically-sealed package and a method of forming such package are disclosed. The package includes a housing that extends along a housing axis between a first end and a second end, where the housing includes first and second opaque portions and a transparent portion disposed between the first and second opaque portions. The first opaque portion is hermetically sealed to a first end of the transparent portion and the second opaque portion is hermetically sealed to a second end of the transparent portion. At least one of the first and second opaque portions is hermetically sealed to the transparent portion by a weld ring. The package further includes a power source disposed within the housing, and an inductive coil disposed at least partially within the transparent portion of the housing and electrically connected to the power source.