Flexible Substrate Conductive Grid for Blister Package Monitoring
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Solution Overview
Problem
Current medication monitoring devices for blister packages face challenges such as difficulty connecting flexible substrates to rigid tags, instability of conductive inks, cost issues, and limitations in reliability, consumer usability, and integration with pharmaceutical packaging processes.
Innovation Solution
A smart package monitoring system featuring a reusable electronic sensor tag connected to a conductive grid printed on a thin flexible substrate, with an optical ink indicator for status display, and optional features like capacitive sensors, printed batteries, and wireless communication, allowing for reliable, cost-effective, and user-friendly monitoring.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If conductive ink is printed on paperboard substrate, then the device can be manufactured with standard pharmaceutical packaging, but the conductive ink becomes unstable and yields unreliable electrical characteristics
Solution Approach 1:
The patent changes the substrate material parameter from paperboard to thin flexible plastic substrate, and changes the conductive material from printed conductive ink to vacuum-deposited metal layers (silver, aluminum, or copper). This parameter transformation maintains compatibility with pharmaceutical packaging while achieving stable and reliable electrical characteristics that do not crack or degrade under repeated deformation.
Solution Approach 2:
The patent employs composite material structures including multiple vacuum-deposited metal layers (silver, aluminum, copper) combined with thin flexible plastic substrates. This composite approach provides both the flexibility needed for pharmaceutical packaging integration and the electrical stability required for reliable monitoring, eliminating the instability issues of printed conductive inks on paperboard.
2Ease of manufacture
If printed conductive ink is used, then manufacturing cost is reduced, but the conductive ink cracks under repeated deformation
Solution Approach 1:
The patent transitions from printed conductive ink to vacuum-deposited metal layers on flexible substrates. This parameter change eliminates the cracking issue under repeated deformation while maintaining cost-effectiveness through efficient vacuum deposition processes that can be integrated into existing pharmaceutical packaging manufacturing lines.
Solution Approach 2:
The patent uses thin flexible plastic substrates with vacuum-deposited metal films instead of printed conductive inks. This flexible film structure naturally accommodates repeated deformation without cracking, while the vacuum deposition process provides cost-effective manufacturing that can be integrated into standard pharmaceutical packaging production.
3Reliability
If rigid tag is connected to flexible substrate grid, then electrical connection is achieved, but connection difficulty increases
Solution Approach 1:
The patent uses a thin flexible substrate that integrates the grid and tag into a single flexible assembly. This eliminates the need to connect rigid tags to flexible substrates, as both components are formed on the same flexible base material, thereby simplifying the connection process while maintaining reliable electrical continuity.
Solution Approach 2:
The patent merges the grid and tag into a single integrated flexible assembly, both formed on the same flexible substrate. This consolidation eliminates the separate connection step between rigid tags and flexible substrates, reducing device complexity and connection difficulty while ensuring reliable electrical continuity throughout the monitoring device.
4Strength
If thick substrate is used, then structural integrity is improved, but package bulk increases
Solution Approach 1:
The patent employs thin flexible plastic substrates that provide sufficient structural integrity for pharmaceutical packaging applications while minimizing package bulk. The flexibility of these thin films allows them to conform to the packaging requirements without requiring excessive thickness, thus reducing overall package volume.
Solution Approach 2:
The patent optimizes the substrate thickness parameter to achieve the minimum required for structural integrity while minimizing bulk. By using flexible plastic materials with appropriate mechanical properties, the substrate can be made thin enough to reduce package bulk but still provide sufficient strength for handling and protection of pharmaceutical contents.
Data Source
AI summary
There is provided a smart package and monitoring system having a status indicator and a method of making the same. The smart package includes an electronic sensor monitoring tag having re-usable electronic circuitry and power source along with a conductive grid printed on a thin flexible substrate and connected to the tag so the tag and grid are in electrical continuity to form a monitoring device. The conductive grid is aligned with an opening of the smart package. The smart package can also include an optical ink indicator configured to display the status of the package. A multiplexer can be used to connect the tag to the conductive grid. The conductive grid can include capacitive sensors formed on a thin plastic layer and positioned so as to form a capacitive element with the conductive side of the blister.