Polymer Coated Implantable Device Housing Surface Protection
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Solution Overview
Problem
Implantable medical devices face issues with surface damage during manufacturing, leading to poor tissue interface and increased interfacial impedance, which can result in device failure and reduced manufacturing yield, due to scratches and abrasions on the metal housings.
Innovation Solution
A polymer coating is applied to the metal housing of implantable medical devices, providing improved tissue interface, anti-static properties, and reduced wear and tear, including conductive, dissolvable, and antimicrobial layers that enhance lubricity and prevent bacterial attachment, thereby reducing the need for manual polishing and buffing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If manual buffering and polishing processes are used to repair housing damage, then surface quality is improved, but manufacturing cost increases and manufacturing speed decreases
Solution Approach 1:
A protective polymer coating is applied to the metal housing surface before manufacturing processes begin. This preliminary protective layer prevents scratches and abrasions during handling and assembly operations, eliminating the need for subsequent manual buffering and polishing steps while maintaining surface quality.
Solution Approach 2:
The polymer coating acts as an intermediary protective layer between the metal housing surface and external mechanical stresses during manufacturing. This intermediary layer absorbs wear and damage, protecting the underlying metal surface from direct contact and damage during assembly operations.
2Manufacturing precision
If manual buffering and polishing processes are used to repair housing damage, then surface quality is improved, but manufacturing cost increases
Solution Approach 1:
A protective polymer coating is applied to the metal housing surface before manufacturing processes begin. This preliminary protective layer prevents scratches and abrasions during handling and assembly operations, eliminating the need for subsequent manual buffering and polishing steps while maintaining surface quality.
Solution Approach 2:
The polymer coating is a low-cost, consumable protective layer that is applied to the housing surface. Rather than investing in expensive manual polishing operations, the system uses a disposable protective coating that prevents damage in the first place, reducing overall manufacturing costs.
3Productivity
If the housing surface is damaged during manufacturing, then manufacturing yield decreases, but applying protective measures increases process complexity
Solution Approach 1:
The polymer coating serves multiple functions simultaneously: it protects the housing surface from mechanical damage during assembly, provides a lubricious surface to reduce tissue friction during implantation, and can incorporate antimicrobial properties. This multi-functionality increases manufacturing yield without significantly complicating the process.
Solution Approach 2:
The invention changes the surface properties of the housing by applying a polymer coating with different physical and chemical parameters than the metal substrate. This parameter change enables the surface to resist damage and interact more favorably with biological tissue, improving manufacturing yield and device performance.
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 polymer coating improves tissue integration, reduces interfacial impedance, and provides antimicrobial benefits, resulting in enhanced performance and reduced manufacturing costs by minimizing surface damage and bacterial infections.
Implementation Method 1
The lubricious material may be conductive. The housing may be used as an electrode
Implementation Method 2
An anti-infection agent and/or lubricious material may be placed on the housing in the form of a coating to facilitate insertion
Implementation Method 3
An anti-infection agent and/or lubricious material may be placed on the housing in the form of a coating to facilitate insertion or to reduce the likelihood of infection
Data Source
Figure 1
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AI summary
One aspect provides a housing for an implantable medical device, the housing including a metal substrate having an external surface, and a polymer coating disposed on the external surface of the metal housing, the polymer coating comprising at least one layer of polymer material.