Mr. Daniel D. Hilbich Profile

Daniel D. Hilbich

Research Assistant at Simon Fraser Univ

SPIE Involvement:

Author

Publications (5)

Proceedings Article | 13 May 2016 Open Access

Stretchable electronics for wearable and high-current applications

Daniel Hilbich, Lesley Shannon, Bonnie Gray

Proceedings Volume 9802, 98020R (2016) https://doi.org/10.1117/12.2219284

KEYWORDS: Stretchable circuits, Polymers, Electronics, Metals, Electromagnetism, Actuators, Microelectromechanical systems, Copper, Optical alignment, Magnetism

Read Abstract +

DOWNLOAD PAPER

Proceedings Article | 16 April 2014 Paper

A new low-cost, thick-film metallization transfer process onto PDMS using a sacrificial copper seed

Daniel Hilbich, Ajit Khosla, Lesley Shannon, Bonnie Gray

Proceedings Volume 9060, 906007 (2014) https://doi.org/10.1117/12.2045228

KEYWORDS: Copper, Photoresist materials, Electroplating, Plating, Polishing, Surface roughness, Transparency, Flexible circuits, Metals, Manufacturing

Read Abstract +

Proceedings Article | 24 October 2012 Paper

Manipulation of permanent magnetic polymer micro-robots: a new approach towards guided wireless capsule endoscopy

D. Hilbich, A. Rahbar, A. Khosla, B. Gray

Proceedings Volume 8548, 85482I (2012) https://doi.org/10.1117/12.979250

KEYWORDS: Magnetism, Endoscopy, Polymers, Polymethylmethacrylate, Nanocomposites, Composites, Lithography, Microelectromechanical systems, Endoscopes, Microfabrication

Read Abstract +

Proceedings Article | 16 February 2011 Paper

Large scale micropatterning of multi-walled carbon nanotube/polydimethylsiloxane nanocomposite polymer on highly flexible 12x24 inch substrates

A. Khosla, D. Hilbich, C. Drewbrook, D. Chung, B. Gray

Proceedings Volume 7926, 79260L (2011) https://doi.org/10.1117/12.876738

KEYWORDS: Nanocomposites, Polymers, Polymethylmethacrylate, Laser systems engineering, Carbon dioxide lasers, Electrodes, Microfabrication, Carbon, Carbon nanotubes, Ultrasonics

Read Abstract +

Proceedings Article | 15 February 2011 Paper

Bidirectional magnetic microactuators for uTAS

Daniel Hilbich, Ajit Khosla, Bonnie Gray, Lesley Shannon

Proceedings Volume 7929, 79290H (2011) https://doi.org/10.1117/12.875788

KEYWORDS: Magnetism, Actuators, Microfluidics, Microactuators, Polymers, Polymethylmethacrylate, Nanocomposites, Microelectromechanical systems, Lab on a chip, Polymeric actuators

Read Abstract +

We present the design, fabrication and characterization of a novel bidirectional magnetic microactuator. The actuator has a planar structure and is easily fabricated using processes based on laser micromachining and soft lithography, allowing it to be readily integrated into microfluidic, microelectromechanical systems (MEMS) and lab-on-a-chip (LOC) designs. The new microactuator is a thin magnetic membrane with a central magnet feature. The membrane and magnet are both composed of a magnetic nanocomposite polymer (M-NCP) material that is fabricated by embedding magnetic powder in a polydimethysiloxane (PDMS) polymer matrix. The magnetic powder (MQP-12-5) has the chemical composition of (Nd0.7Ce0.3)10.5Fe83.9B5.6, and contains grains that are 5-6 microns in size. The powder is uniformly dispersed at a weight percentage of 75 wt-% in the PDMS matrix, and micropatterned using soft lithography micromolding to realize magnetic microstructures, which sit on a thinner magnetic PDMS membrane of the same material. The molds are fabricated by laser-etching into Poly (methyl methacrylate) (PMMA) using a Universal Laser System's VersaLASER© laser ablation system. The PDMS-based M-NCP is then poured and spun over the mold patterns, producing a thin polymer membrane to which the polymer micromagnets are attached, forming a one-piece actuator. The M-NCP is initially un-magnetized, but is then magnetized by placing it in a 2.5T magnetic field to produce permanent bidirectional magnetization that is polarized in the specified direction. To characterize the bidirectional actuators, a uniform magnetic field is established via a Helmholtz coil pair, and is characterized by applying varying currents. The magnetic field (and thus the actuator deflection) is controlled by regulating the current in the Helmholtz pair. Using this apparatus, deflection versus field characteristics are obtained, with maximum deflections varying as a function of actuator dimensions and the applied magnetic field. Permanent rare earth magnets are used to produce supplemental fields for higher magnetic fields and higher deflections. Deflections of 100 micrometers and more are observed for 3 to 8 mm square membranes with central magnetic features ranging from 0.8 to 3.6 mm squares, in magnetic fields ranging from 52 to 6.2 mT. In addition, smaller membranes (1 mm and 2 mm with 0.4 mm and 0.6 mm central magnets, respectively) also deflect 20 and 50 microns, respectively, under 72 mT fields.

View contact details

UPDATE YOUR PROFILE

Is this your profile? Update it now.

Sign into your SPIE.org account

Don’t have a profile and want one?

Create an account on SPIE.org

Keywords/Phrases

Search In:

Publication Years