Implanted Flexible Electronics: Set Device Lifetime with Smart Nanomaterials

Phan, Hoang‐Phuong

doi:10.3390/mi12020157

Cited by 27 publications

(30 citation statements)

References 58 publications

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“…We can find them in almost anything of quotidian use, from simple things such as cell phone charges [ 1 ] to TVs and home appliances. However, they have become more relevant in the development of electric and hybrid vehicles, electric machines [ 2 ], renewable energy systems [ 3 , 4 , 5 , 6 ], and recently in implanted electronics [ 7 , 8 ] to open the possibility to micro-scale neural interfaces [ 9 ]. Inside these devices and systems, a power stage is conformed by magnetic and electronic components.…”

Section: Introductionmentioning

confidence: 99%

Power Losses Models for Magnetic Cores: A Review

et al. 2022

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In power electronics, magnetic components are fundamental, and, unfortunately, represent one of the greatest challenges for designers because they are some of the components that lead the opposition to miniaturization and the main source of losses (both electrical and thermal). The use of ferromagnetic materials as substitutes for ferrite, in the core of magnetic components, has been proposed as a solution to this problem, and with them, a new perspective and methodology in the calculation of power losses open the way to new design proposals and challenges to overcome. Achieving a core losses model that combines all the parameters (electric, magnetic, thermal) needed in power electronic applications is a challenge. The main objective of this work is to position the reader in state-of-the-art for core losses models. This last provides, in one source, tools and techniques to develop magnetic solutions towards miniaturization applications. Details about new proposals, materials used, design steps, software tools, and miniaturization examples are provided.

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Section: Introductionmentioning

confidence: 99%

Power Losses Models for Magnetic Cores: A Review

et al. 2022

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“…Table 2 summarizes material properties of frequently-used diffusion barrier of the biocompatible package. Diffusion barrier is a dielectric film deposited on a Si surface or an encapsulating polymer to avoid liquid passage through biocompatible package [ 33 , 34 , 35 , 36 , 37 , 38 , 39 , 40 ]. The dielectric layer, Al 2 O 3 deposited by ALD (Atomic Layer Deposition) is frequently used as moisture barrier between polymer layers to increase adhesion strength between the polymer layers or enhance the life-time of a neural electrode bilayered with parylene material [ 41 , 42 ].…”

Section: Biocompatible Packaging Methodsmentioning

confidence: 99%

Polymer-Based Biocompatible Packaging for Implantable Devices: Packaging Method, Materials, and Reliability Simulation

Seok

2021

Micromachines

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Polymer materials attract more and more interests for a biocompatible package of novel implantable medical devices. Medical implants need to be packaged in a biocompatible way to minimize FBR (Foreign Body Reaction) of the implant. One of the most advanced implantable devices is neural prosthesis device, which consists of polymeric neural electrode and silicon neural signal processing integrated circuit (IC). The overall neural interface system should be packaged in a biocompatible way to be implanted in a patient. The biocompatible packaging is being mainly achieved in two approaches; (1) polymer encapsulation of conventional package based on die attach, wire bond, solder bump, etc. (2) chip-level integrated interconnect, which integrates Si chip with metal thin film deposition through sacrificial release technique. The polymer encapsulation must cover different materials, creating a multitude of interface, which is of much importance in long-term reliability of the implanted biocompatible package. Another failure mode is bio-fluid penetration through the polymer encapsulation layer. To prevent bio-fluid leakage, a diffusion barrier is frequently added to the polymer packaging layer. Such a diffusion barrier is also used in polymer-based neural electrodes. This review paper presents the summary of biocompatible packaging techniques, packaging materials focusing on encapsulation polymer materials and diffusion barrier, and a FEM-based modeling and simulation to study the biocompatible package reliability.

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“…For submicron LM particles, the rupture stress versus diameter relationship has been determined. 66 They found that the activation stress was inversely proportional to the diameter of the LM droplets, meaning larger droplets ruptured with less stress, calculated as shown in Equation (1).…”

Section: Activation Of Liquid Metal Inclusionsmentioning

confidence: 99%

“…In recent years, the adoption rate of wearable electronics has begun to surge from its prototypical infancy in the early part of the last decade. The demand for such devices is driven by, but not limited to, the increasing desire for continuous health monitoring, [1][2][3][4] controlled delivery of nanomedicines, [5][6][7] advancement of soft robotics, [8][9][10][11][12] and physically immersive virtual/augmented reality products. [13][14][15] A limitation that these diverse technologies all have in common is the constraints set by current rigid electronics that force their soft environments to conform around them.…”

Section: Introductionmentioning

confidence: 99%

Multifunctional liquid metal polymer composites

Guymon

Malakooti

2022

Journal of Polymer Science

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Liquid metal polymer composites are an emerging class of functional materials with potentially transformative impacts in wearable electronics, soft robotics, and human-computer interactions. By employing different processing methods, room temperature liquid metal inclusions can be embedded in insulating polymers like elastomers to incorporate functional properties of metals while the matrix remains soft and stretchable. These solid-liquid composites offer an interesting, yet complex multifunctional material system. In this review, we present an exclusive overview of the synthesis methods, structural and functional properties, and applications of gallium-based liquid metal polymer composites. Common methods to control the size of liquid metal inclusions and their interaction in polymers are discussed. Moreover, the effect of liquid metal microstructures on the overall properties of the composites is summarized. We also highlight the new trends in terms of material composition, printing process, and novel applications of liquid metal polymer composites in intelligent systems.

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Implanted Flexible Electronics: Set Device Lifetime with Smart Nanomaterials

Cited by 27 publications

References 58 publications

Power Losses Models for Magnetic Cores: A Review

Power Losses Models for Magnetic Cores: A Review

Polymer-Based Biocompatible Packaging for Implantable Devices: Packaging Method, Materials, and Reliability Simulation

Multifunctional liquid metal polymer composites

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