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Application · Neural implants

Medical silicone for brain–computer interfaces & neural electrodes

BCI and neural electrodes are long-term implants, so the silicone choice comes down to three things: use unrestricted, long-term implant-grade, platinum-cure silicone for insulation and encapsulation; use a low-modulus gel or soft elastomer at the tissue interface to reduce foreign-body response; and bond to Pt/Ir, titanium and polyimide with the right primer (often after plasma treatment). Note silicone is permeable to moisture/oxygen, so active electronics still need a hermetic package — the silicone provides the flexible outer insulation and tissue interface.

Solution essentials

  • Compliance grade: long-term implantation requires unrestricted implant-grade silicone with ISO 10993 device-level evaluation; master-file references where available.
  • Insulation / encapsulation: LSR for thin precise walls, HCR for housings and thicker sections.
  • Adhesion: titanium needs a dedicated primer; polyimide / parylene typically need plasma + primer; noble-metal contacts need a compatible primer.
  • Active-electronics moisture: silicone is not a hermetic barrier — pair with hermetic packaging; silicone carries the flexible insulation and tissue interface.

What BIO provides

For China neural-interface teams (and global teams supplying into China), BIO provides grade selection, process and adhesion support, regulatory documentation (TDS / CoA / master-file references) and reliable supply of NuSil / Avantor implant-grade silicone.

FAQ

What medical silicone is used for BCI / neural electrodes?

Long-term implantation needs unrestricted, implant-grade silicone (high-consistency rubber and low-modulus gels), preferably platinum (addition) cure for no by-products and low shrinkage, with full ISO 10993 device-level evaluation.

How do you bond silicone to platinum, titanium or polyimide electrodes?

Use the matching primer, usually after plasma treatment: titanium uses a dedicated metal primer; polyimide and parylene use plasma plus a primer; noble-metal contacts use a compatible primer system.

Can silicone hermetically seal the active electronics of a neural implant?

Not on its own — silicone is permeable to moisture and oxygen. Long-term active electronics need a hermetic package (metal/ceramic where required); silicone provides the outer flexible insulation and the tissue interface.

What can BIO support?

Selection, process and adhesion support, regulatory documentation and supply of NuSil / Avantor implant-grade silicone. Contact [email protected] / +86-21-6054-7148.

Need exact grade selection and a quote for your device and annual volume? Talk to a BIO engineer ([email protected] / +86-21-6054-7148), or browse medical silicone by type.

Tell us your device — we return the grade and the paperwork.

Genuine NuSil / Avantor medical-grade silicone, matched to your application, with TDS / CoA and lot-level traceability.

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