With our patented °AirRay electrode technology we have overcome current limitations of electrodes.

Based on our laser-aided manufacturing process we can design and manufacture electrodes according to your actual requirements – in any geometrical shape, with hundreds of contacts, and for numerous applications.

 All our products are engineered and manufactured in Germany

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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 Variation – 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

Get all Information at a Glance

Click here to download the Datasheet for our Electrode Technology.

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. 0,03 260 kΩ    5 kΩ 32 kΩ     0,6 kΩ

Platinum-Iridium (90/10)

0,09 mC/cm2 47 kΩ     1 kΩ 8 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.

Discover our Other Services:


Active Implant Technology

Based on our technological competences we are providing solutions for the most innovative therapies of tomorrow already today – starting from single components right up to full active systems.

Our service comprises the full range from designing and encapsulating implantable electronics over to interconnections to electrodes up to developing firmware and software.

Learn more


Complete System

CorTec Brain Interchange ONE joins the scope of our competences interconnecting the neural system to artificial intelligence.

The fully implantable system for recording and stimulation both on 32 channels enables open and closed loop interaction with the nervous system.

Learn more


Our Service

Our services include all important steps from providing solutions how to realize your idea of a product over development and testing up to manufacturing the approved medical device.

With our application-related, technological, and regulatory know-how we support every step on the way to your implant.

Learn more


All information about our technologies at a glance:

Click here to download our new CorTec Business Catalogue


Through our quality management system, we meet the highest requirements of the applicable standards.

CorTec is DIN EN ISO 13485 certified and has high-class clean rooms.

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You would like to hear a second opinion?

Read more about the experiences of our customers with our products and services in our Reference Section.