Microchip Substance Delivery Devices with Low-Power Electromechanical Release Mechanisms
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Solution Overview
Problem
Current micro-electromechanical drug delivery devices lack low-power release mechanisms for controlled substance delivery, which can lead to inefficient energy use and potential adverse effects on the organism.
Innovation Solution
The development of electromechanical substance delivery devices with low-power release mechanisms, including localized heating and stress-induced rupture mechanisms using electrode structures and voids in membranes, to precisely control the release of substances from micro-reservoirs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If electrical actuation mechanisms are used to rupture releasable membranes, then controlled release of substances can be achieved, but energy consumption increases and power dissipation adversely affects reservoir contents and organism cell function
Solution Approach 1:
The patent replaces high-power electrical heating mechanisms with a low-power electromechanical system. An electrode structure applies localized electrical stress to induce mechanical rupture of the membrane through electrostatic forces, rather than using thermal effects. This substitution of thermal-mechanical actuation with direct electromechanical actuation dramatically reduces energy consumption while maintaining reliable controlled release capability.
Solution Approach 2:
The electrode structure is designed to apply electrical stress locally to specific regions of the releasable membrane, creating localized rupture points. This localized actuation approach minimizes the total energy required compared to global heating methods, as only small specific areas need to be affected to initiate substance release while the rest of the system remains at normal operating conditions.
2Speed
If high-power heating mechanisms are used to melt or vaporize membranes, then rapid release can be achieved, but adverse effects on reservoir contents and organism cell function increase
Solution Approach 1:
The patent replaces thermal-mechanical rupture methods (heating to melt or vaporize) with direct electromechanical rupture. The electrode structure generates electrical stress that directly causes mechanical failure of the membrane material through electrostatic forces, eliminating the need for thermal processing. This achieves rapid release without the harmful thermal effects on temperature-sensitive reservoir contents and surrounding biological tissues.
Solution Approach 2:
The patent changes the actuation parameter from thermal (temperature) to electrical (voltage-induced stress). By using electrical fields to directly stress the membrane material, the system achieves membrane rupture through mechanical stress rather than thermal softening or vaporization. This parameter change allows rapid release while avoiding the adverse thermal effects that would damage sensitive contents and cells.
3Duration of action of moving object
If conventional release mechanisms are used, then device functionality is maintained, but energy requirements increase for long-term operation
Solution Approach 1:
The patent implements an electromechanical release mechanism that uses electrical stress from an electrode structure to rupture membranes, replacing conventional thermal or mechanical release systems. This electromechanical approach consumes minimal energy, enabling the device to operate for extended periods on small power sources such as thin-film batteries, thereby significantly extending operational duration for chronic drug delivery applications.
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
These mechanisms enable precise, low-energy controlled release of substances, minimizing adverse effects and optimizing device operation, while reducing energy consumption and ensuring reliable delivery over extended periods.
Implementation Method 1
an electrode structure that is configured to locally heat a portion of the membrane in response to a control voltage applied to the electrode structure
Implementation Method 2
an electrode structure configured to thermally expand in response to a control voltage applied to the electrode structure and apply a tensile stress to the portion of the membrane within which the voids are formed
Implementation Method 3
The plurality of filaments are electrically connected in parallel to the first and second contacts of the electrode structure, and the filaments are configured to melt in succession in response to a control voltage applied to the first and second contacts
Data Source
AI summary
Electromechanical substance delivery devices are provided which implement low-power electromechanical release mechanisms for controlled delivery of substances such as drugs and medication. For example, an electromechanical device includes a substrate having a cavity formed in a surface of the substrate, a membrane disposed on the surface of the substrate covering an opening of the cavity, and a seal disposed between the membrane and the surface of the substrate. The seal surrounds the opening of the cavity, and the seal and membrane are configured to enclose the cavity and retain a substance within the cavity. An electrode structure is configured to locally heat a portion of the membrane in response to a control voltage applied to the electrode structure, and create a stress that causes a rupture in the locally heated portion of the membrane to release the substance from within the cavity.