Stress-adaptive meander track for stretchable electronics

Biswas, Shantonu; Reiprich, Johannes; Pezoldt, Joerg; Hein, Matthias; Stauden, Thomas; Jacobs, Heiko O.

doi:10.1088/2058-8585/aad583

Cited by 12 publications

(16 citation statements)

References 24 publications

(33 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…A 10 µm thick Au layer is produced via electrodeposition using the thin, evaporated Au layer to seed electroplating. The residual Au seed layer is chemically removed after electrodeposition, yielding meander‐shaped metal interconnects [ 28 ] on the carrier substrate that are needed to ensure stretchability (see Figure S5 in the Supporting Information). At this stage the substrate is ready for the mounting of active surface mount components (see Figure S6 in the Supporting Information).…”

Section: Figurementioning

confidence: 99%

Integrated Soft Optoelectronics for Wearable Health Monitoring

Biswas

Shao

Hachisu

et al. 2020

Adv Materials Technologies

Self Cite

View full text Add to dashboard Cite

Recent developments in stretchable electronics hold promise to advance wearable technologies for health monitoring. Emerging techniques allow soft materials to serve as substrates and packaging for electronics, enabling devices to comply with and conform to the body, unlike conventional rigid electronics. However, few stretchable electronic devices achieve the high integration densities that are possible using conventional substrates, such as printed rigid or flexible circuit boards. Here, a new manufacturing method is presented for wearable soft health monitoring devices with high integration densities. It is shown how to fabricate soft electronics on rigid carrier substrates using microfabrication techniques in tandem with strain relief features. Together, these make it possible to integrate a large variety of surface mount components in complex stretchable circuits on thin polymer substrates. The method is largely compatible with existing industrial manufacturing processes. The promise of these methods is demonstrated by realizing skin‐interfaced devices for multimodal physiological data capture via multiwavelength optoelectronic sensor arrays comprised of light emitting diodes and phototransistors. The devices provide high signal‐to‐noise ratio measurements of peripheral hemodynamics, illustrating the promise of soft electronics for wearable health monitoring applications.

show abstract

Section: Figurementioning

confidence: 99%

Integrated Soft Optoelectronics for Wearable Health Monitoring

Biswas

Shao

Hachisu

et al. 2020

Adv Materials Technologies

Self Cite

View full text Add to dashboard Cite

show abstract

“…Metal 1 : One of the major elements of the stretchable electronic devices is the conductive interconnects where rigid SMDs are used, since the interconnects directly contribute to the stretchability of the device. In the current demonstrator, we used 10 µm thick copper (Cu) tracks patterned as stress-adaptive meander shaped 32 . Initially a 50 nm/200 nm thick sputter coated seed layer of Al/Cu is deposited, which is patterned by photolithography to electroplate 10 µm thick layer of Cu (Supplementary Fig.…”

Section: Resultsmentioning

confidence: 99%

Integrated multilayer stretchable printed circuit boards paving the way for deformable active matrix

et al. 2019

Self Cite

View full text Add to dashboard Cite

Conventional rigid electronic systems use a number of metallization layers to route all necessary connections to and from isolated surface mount devices using well-established printed circuit board technology. In contrast, present solutions to prepare stretchable electronic systems are typically confined to a single stretchable metallization layer. Crossovers and vertical interconnect accesses remain challenging; consequently, no reliable stretchable printed circuit board (SPCB) method has established. This article reports an industry compatible SPCB manufacturing method that enables multilayer crossovers and vertical interconnect accesses to interconnect isolated devices within an elastomeric matrix. As a demonstration, a stretchable (260%) active matrix with integrated electronic and optoelectronic surface mount devices is shown that can deform reversibly into various 3D shapes including hemispherical, conical or pyramid.

show abstract

“…To connect the fabricated test structure with the preexisting touchpad controller, manual point‐to‐point wiring and soldering is used. The depicted metamorphic touchpad in EcoFlex is stretchable to 220% which can be increased up to 320% using a different meander metal track design . This high stretchability allows the device to be deformed to different geometrical shapes as demonstrated previously for other devices .…”

mentioning

confidence: 81%

“…Placing the finger onto the array will change the charge distributions of the corresponding plates resulting in changesin the mutual capacitance of a particular column and row, leading to a point under single touch operation (pointed by a black circle). These nonstretchable checker plates are replaced using a stretchable meander‐shaped metal mesh (Figure C). The mesh mimics the checker shape to maintain a similar change in capacitance upon touch by keeping the physical dimension of each checker the same.…”

mentioning

confidence: 99%

See 1 more Smart Citation

Metamorphic Stretchable Touchpad

Biswas

Reiprich

Pezoldt

et al. 2019

Adv Materials Technologies

Self Cite

View full text Add to dashboard Cite

nanowires (AgNWs) in polydimethylsiloxane (PDMS) [24] or liquid metals [25,26] as stretchable interconnects. However, the performances were limited to low lateral resolution capacitive sensing. The reported methods may, in our view, be challenged when it comes to high resolution patterning and multilayer registration which are two requirements to fabricate higher quality devices.In this article, we report on the design and realization of a 3D metamorphic touchpad which is able to morph reversibly from a planar to a hemispherical form. Moreover, the touchpad can be wrapped around a 3D object or body. To the best of our knowledge such a device has not been made. We mimic a commercially available universal serial bus (USB) connectable touchpad layout and translate the particular design and key elements to become metamorphic. This way the existing USB computer interface and software could be used. The approach replaces the rigid printed circuit board (PCB) with a metamorphic analog referred to as "metamorphic-PCB". Metamorphic PCBs describe a new concept and the realization of such boards to produce the touchpad is presented. Once fully developed, most rigid board based electronic systems known today, can be mimicked and translated to become metamorphic in the future. Figure 1 describes the 3D metamorphic touchpad design approach. The actual design mimics the checker board pattern found in most touchpad designs. The X-ray image shows ( Figure 1A) the layout (SpeedLink SL-6331-BK, Weertzen, Germany) we used as inspiration. The goal was to replace the capacitive touch sensor array with a metamorphic design with a similar behavior to reuse the existing capacitive touch controller, USB connection, and machine interface. The approach replaces the rigid-PCB of the commercial device with a metamorphic analog. The original design uses, as revealed by the X-ray image, two electrically separated metal layers which are patterned to form addressable rows and columns of checkers. Figure 1B schematically illustrates the operation principle of this touchpad which is based on mutual capacitance. Since the physical dimension of the conductive plates is the same, the plates contain an equal amount of charges at normal condition. Placing the finger onto the array will change the charge distributions of the corresponding plates resulting in changes in the mutual capacitance of a particular column and row, leading to a point under single touch operation (pointed by a black circle). These nonstretchable checker plates are replaced using a stretchable meander-shaped metal mesh [27] (Figure 1C). The mesh mimics the checker shape to maintain a similar Conventional touchpads are an example of a common human-machine interface. They are rigid devices with a limited usability without any form of adaptability and conformity to different morphologies necessary for gaming and virtual reality applications. A metamorphic touchpad is an envisioned conceptual approach of shape changing electronics. To demonstrate this, a multipurpose touchpad able to s...

show abstract

Stress-adaptive meander track for stretchable electronics

Cited by 12 publications

References 24 publications

Integrated Soft Optoelectronics for Wearable Health Monitoring

Integrated Soft Optoelectronics for Wearable Health Monitoring

Integrated multilayer stretchable printed circuit boards paving the way for deformable active matrix

Metamorphic Stretchable Touchpad

Contact Info

Product

Resources

About