ELECTRODE types Striving for the highest signal quality possible.

Highest quality, off-the-shelf.

Electrode materials

Each aspect of Blackrock’s arrays is designed to provide the highest quality signal possible. Blackrock provides a wide host of products that were developed to meet the challenges of various experiments.  From acute peripheral nerve studies in animal models to chronic implants in clinical trials, Blackrock has the right product system to meet your research goals.

Choose from the following electrode array types:

If our off-the-shelf electrode don’t meet your needs, contact us for our customization options.

The correct array size for your experiment.

To begin, a researcher needs to decide on how many channels they would like to record and for what purpose.

Choosing the size of your array depends on your research subject and data volume you want to record. Larger arrays, such as the 10×10, will record the most data from a larger area of the brain. The greater the area that is covered by the array, the more data that will be yielded.

Smaller arrays are recommended for research in rodents, while larger arrays are often used for clinical investigations.

Electrode length matters.

The next step is to determine which area of the brain one wants to stimulate or record from. The Utah Array can be manufactured in various lengths, such as:

  • 1.5mm
  • 1.0mm
  • 0.5mm

Cortical layers of the brain differ in size between animals and the length of the electrode must be tailored appropriately. An electrode that is too long could easily damage a rodent brain, while one that is too short might not extract meaningful data from a human brain.

The region from which one wants to record/stimulate from will also play a role in the length of the electrode. It is important to know which area of the brain one wants to focus on to choose the right array.

The right electrode material for your research.

Choosing the right electrode material for your research has an enormous impact on your research results.

Blackrock offers the following standard materials for the actual electrodes and their encapsulation:

Electrode materials

Platinum (Pt)


  • Thoroughly researched and proven chronic reliability
  • Best suited for recording applications

Sputtered Iridium Oxide Film (SIROF)


  • Improved electrical characteristics (Impedance, Charge Capacity, etc.)
  • Best suited for stimulation and acute recording applications where sensitivity is key

Encapsulation materials

Choosing the correct encapsulation material for your electrode is largely dependent on on your specific use case. The two most common encapsulation materials are Parylene-C  and Alumina + Parylene-C.



  • Proven biocompatibility
  • Chemically inert
  • Low dielectric constant

Alumina + Parylene-C


  • Alumina acts as moisture barrier to protect Parylene-C interface

The optimal wire length is no coincidence.

Picking the appropriate wire length will determine where the connector is placed on the subject. The length of the wire depends on where the array was implanted and where the researcher wants the connector to sit on the subject.

Most researchers prefer that rodents have their connector at the back of their head, where they cannot reach. For primates, the connector is secured adjacent to the implant site.

Typical electrode wire lengths range between 2.5 cm to 15 cm. The Neuroport Array comes at a standard 13 cm.

Wire length can be customized for any application and intended implant region. Contact us to find out what the options are.

Choose your connector carefully.

Connectors are determined by the size of the subject. Omnetics connectors are more suitable for smaller animals, while the CerePort fits larger animals better.

We offer our off-the-shelf electrodes with the following connectors:








Our standard electrodes are available in 0.5, 1.0, and 1.5mm length.

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