Medical Probe Electrode Recess Geometry for Anti-Delamination Bonding
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Solution Overview
Problem
Existing medical probes face challenges in securely attaching electrodes to spines using adhesive, as adhesives often fail to adhere well to metal surfaces, leading to electrodes becoming loose and sliding out of place.
Innovation Solution
The electrodes feature recesses in their body design, allowing adhesive to be received and secured, with a larger gap distance in the second portion preventing the adhesive from being removed once hardened, ensuring a stable attachment to the spine.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If adhesive is used to attach electrodes to spines, then the attachment process is easier and more cost-effective, but the adhesive does not adhere well to metal surfaces causing electrodes to become loose
Solution Approach 1:
The electrode incorporates a porous layer on its surface that can absorb and retain adhesive material. This porous structure increases the surface area for adhesive bonding and allows the adhesive to penetrate into the material, creating a stronger mechanical interlock between the electrode and the spine, thereby resolving the contradiction between ease of manufacture and bond strength.
Solution Approach 2:
The electrode uses a composite structure combining metal components with a porous coating or layer that has enhanced adhesive properties. This composite approach allows the electrode to maintain the electrical conductivity of metal while adding a surface layer that provides superior adhesive bonding, thus achieving both ease of manufacture and reliable attachment.
2Reliability
If soldering or welding is used to attach electrodes to spines, then the bond strength is sufficient, but it is difficult to perform due to the small size of electrodes
Solution Approach 1:
The invention replaces the complex mechanical processes of soldering or welding with a simpler adhesive bonding system. By using a porous layer that enhances adhesive retention, the attachment process becomes less skill-intensive and easier to perform while maintaining sufficient bond strength, thus resolving the contradiction between reliability and ease of operation.
Solution Approach 2:
The porous layer acts as an intermediary between the electrode and the adhesive, providing a surface that enhances adhesive bonding without requiring the electrode itself to be modified for soldering or welding. This intermediary layer simplifies the attachment process while ensuring reliable bonding.
Data Source
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AI summary
The disclosed technology includes an electrode comprising a body extending along a longitudinal axis from a proximal end to a distal end. The body defines a tissue-facing surface, a lumen extending along the longitudinal axis through the body from the proximal end to the distal end, and one or more recesses extending through the body transverse to the longitudinal axis of the body. The one or more recesses are disposed between the tissue-facing surface and the lumen and define a first portion extending into the body a first depth and a second portion extending from the first portion a second depth into the body. The first portion comprises a first gap distance and the second portion comprises a second gap distance. The second gap distance can be greater than the first gap distance.