Stretchable Micro-Electrode Array

Conference · Fri Mar 08 04:00:00 EST 2002

OSTI ID:15005307

Maghribi, M; Hamilton, J; Polla, D; Rose, K; Wilson, T; Krulevitch, P

This paper focuses on the design consideration, fabrication processes and preliminary testing of the stretchable micro-electrode array. We are developing an implantable, stretchable micro-electrode array using polymer-based microfabrication techniques. The device will serve as the interface between an electronic imaging system and the human eye, directly stimulating retinal neurons via thin film conducting traces and electroplated electrodes. The metal features are embedded within a thin ({approx}50 micron) substrate fabricated using poly (dimethylsiloxane) (PDMS), a biocompatible elastomeric material that has very low water permeability. The conformable nature of PDMS is critical for ensuring uniform contact with the curved surface of the retina. To fabricate the device, we developed unique processes for metalizing PDMS to produce robust traces capable of maintaining conductivity when stretched (5%, SD 1.5), and for selectively passivating the conductive elements. An in situ measurement of residual strain in the PDMS during curing reveals a tensile strain of 10%, explaining the stretchable nature of the thin metalized devices.

• Research Organization: Lawrence Livermore National Lab., CA (US)
• Sponsoring Organization: US Department of Energy (US)
• DOE Contract Number: W-7405-ENG-48
• OSTI ID: 15005307
• Report Number(s): UCRL-JC-147676
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
42 ENGINEERING
59 BASIC BIOLOGICAL SCIENCES
BIOLOGY
CURING
DESIGN
ELECTRODES
FABRICATION
MEDICINE
NERVE CELLS
PERMEABILITY
RETINA
STRAINS
SUBSTRATES
TESTING
THIN FILMS
WATER