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Electrode Technology

Key Winning Features

  • High Precision
    Ultra-short pulse laser micromachining allows for very small feature sizes of down to 25 µm at highest reproducibility.
  • Easy Adjustment of Mechanical Properties
    Varying the thickness of silicone, parylene-C, or metal layers creates softer or harder electrode structures.
  • Easy Adaptation of Shape and Functionality
    Electrodes can be modified to build 3-dimensional assemblies as well as nerve cuff electrodes to be wrapped around peripheral nerves.Further adaptions include the integration of microfluidic channels for drug delivery into electrode arrays.
  • Excellent Electrochemical Properties
    Platinum-Iridium or MP35N are used as standard electrode materials.Other materials are available upon request. To improve charge injection capacity, high performance coatings can be provided.
  •  High Level of Patient Safety
    Mechanical interlocking mechanisms prevent electrode contacts from dislocation and ensure safe contact to neural tissue.
  • Improved Usability and Reliability
    Great mechanical adaptability make surgical handling significantly easier. Superior reliability maintains full electrode functionality even under recurring loads.
  • Freedom of Design
    Freedom of Design of the shape of electrode contacts and outlines allows for significantly higher performance of planar or cuff electrodes during stimulation and recording.

Design Options

Multi-Layer Functionalization

  • Adjustment of thickness and flexibility by number and type of polymer or metal layers
  • Adaptation of contact density and functionality by number and type of metal layers
  • Integration of microfluidic channels and ports

General Dimensions


  • Silicone electrodes: 0.15 mm – 1 mm
  • Hybrid silicone-parylene electrodes: 0.08 mm – 1 mm­


Contact size

  • Silicone electrodes: down to 0.1 mm
  • Hybrid silicone-parylene electrodes: down to 0.05 mm


Contact spacing

  • Silicone electrodes: down to 0.3 mm center-to-center
  • Hybrid silicone-parylene electrodes: down to 0.08 mm center-to-center
  • Depending on number of contacts


Contact shape: round, rectangular or arbitrary

Design geometry maximum: 90 mm x 90 mm

Various designs for electrode outline incl. slit contours

Design Variations – Cuff Electrodes

Inner diameter: starting from 0.1 mm

Number of contacts: arbitrary

Closing mechanisms:

  • Split cylinder
  • Buckle-and-belt
  • Self-spiraling
  • Piano hinge

Further closing mechanisms for chronic implantation can be developed

Other Variations

Folding planar AirRay™ electrodes

3D assembly of multiple AirRay™ electrodes

Intrafascicular electrodes

Combination with other technologies:

  • Depth electrodes
  • 3D metal parts

 Functional components such as surgical mesh or suture material

More technical Information




Medical  grade silicone rubber:

Long–term (≥ 30 days)

Short–term (< 30 days)




Medical grade metal alloys:

Platinum-Iridium (90/10)



Stainless Steel


High–performance coatings:

Sputtered Iridium Oxide (SIROF)

Platinum Black

Physical surface modification permits

additional adaptations to the

individual application.



Charge Injection

(Contact Ø 1mm)
10 Hz     1KHz

(Contact Ø 2.7 mm)
10 Hz     1 KHz


Max. 0,03260 kΩ    5 kΩ32 kΩ     0,6 kΩ

Platinum-Iridium (90/10)

0,09 mC/cm247 kΩ     1 kΩ8 kΩ     0,2 kΩ


0,05 mC/cm2  

Sputtered Iridium Oxide (SIROF)

 1 mC/cm2  

Platinum Black

0,25 mC/cm2

Related Services

  • Device design
  • Tests/validations of new designs incl. technical documentation
  • Impedance spectroscopy

Characterization of the electrode’s recording performance.

  •  Pulse testing

Characterization of the electrode’s stimulation performance.

  •  Sterilization

We offer ethylene oxide sterilization including peel-pouch or blister packaging in collaboration with external partners. Upon request steam sterilization using sterile pouches is offered as in-house service.

  • Corrosion testing

Evaluating the corrosion resistance of a particular electrode design for a given stimulation paradigm.

  •  Reliability testing

Common cyclic bending and pull tests under different environmental conditions but also setups tailored to the customer’s needs.