Implantable electrical device comprising a substrate, encapsulation layer and adhesion layer

An implantable electrical device comprising:

• a flexible substrate having a first surface and one or more electrical conductors;
• a first biocompatible encapsulation layer;
• a first adhesion layer, disposed between the first surface and the first encapsulation layer;
• wherein;
• the first surface comprises a Liquid-Crystal Polymer (LCP);
• the first adhesion layer is configured and arranged to conform to the first surface;
• the first encapsulation layer comprises a silicone rubber, and
• the first adhesion layer and the first encapsulation layer are configured and arranged to resist the ingress of fluids from a human or animal body into at least a portion of the first surface,
• wherein the substrate further comprises a second surface, the electrical device further comprising:
• a second biocompatible encapsulation layer that is physically separate from, and disconnected from, the first biocompatible encapsulation layer;
• and
• a second adhesion layer, disposed between the second surface and the second encapsulation layer;
• wherein:
• the second surface comprises a Liquid-Crystal Polymer (LCP);
• the second adhesion layer is configured and arranged to conform to the second surface;
• the second encapsulation layer comprises a silicone rubber, and
• the second adhesion layer and the second encapsulation layer are configured and arranged to resist the ingress of fluids from a human or animal body into at least a portion of the second surface.

An implantable electrical device comprising:

• a flexible substrate having a first surface and one or more electrical conductors;
• a first biocompatible encapsulation layer;
• and
• a first adhesion layer, disposed between the first surface and the first encapsulation layer;
• wherein:
• the first surface comprises a Liquid-Crystal Polymer (LCP);
• the first adhesion layer is configured and arranged to conform to the first surface;
• the first encapsulation layer comprises a silicone rubber,
• the first adhesion layer and the first encapsulation layer are configured and arranged to resist the ingress of fluids from a human or animal body into at least a portion of the first surface, and
• the first adhesion layer comprises a ceramic material selected from the group comprising:
• HfO2, Al2O3, Ta2O3, SiC, Si3N4, TiO2, and any combination thereof.

An implantable electrical device comprising:

• a flexible substrate having a first surface and one or more electrical conductors;
• a first biocompatible encapsulation layer;
• and
• a first adhesion layer, disposed between the first surface and the first encapsulation layer;
• wherein:
• the first surface comprises a Liquid-Crystal Polymer (LCP);
• the first adhesion layer is configured and arranged to conform to the first surface;
• the first encapsulation layer comprises a silicone rubber,
• the first adhesion layer and the first encapsulation layer are configured and arranged to resist the ingress of fluids from a human or animal body into at least a portion of the first surface, and
• the first adhesion layer comprises at least one layer comprising HfO2, adjacent to at least one further layer comprising Al2O3.

An implantable electrical device comprising:

• a flexible substrate having a first surface and one or more electrical conductors;
• a first biocompatible encapsulation layer;
• and
• a first adhesion layer, disposed between the first surface and the first encapsulation layer;
• wherein:
• the first surface comprises a Liquid-Crystal Polymer (LCP);
• the first adhesion layer is configured and arranged to conform to the first surface;
• the first encapsulation layer comprises a silicone rubber,
• the first adhesion layer and the first encapsulation layer are configured and arranged to resist the ingress of fluids from a human or animal body into at least a portion of the first surface, and
• the first adhesion layer comprises at least one layer comprising Ta2O3, adjacent to at least one further layer comprising Al2O3.

An implantable electrical device comprising:

• a flexible substrate having a first surface and one or more electrical conductors;
• a first biocompatible encapsulation layer;
• and
• a first adhesion layer, disposed between the first surface and the first encapsulation layer;
• wherein:
• the first surface comprises a Liquid-Crystal Polymer (LCP);
• the first adhesion layer is configured and arranged to conform to the first surface;
• the first encapsulation layer comprises a silicone rubber,
• the first adhesion layer and the first encapsulation layer are configured and arranged to resist the ingress of fluids from a human or animal body into at least a portion of the first surface, and
• in a cross-section of the implantable electrical device, (i) an extent of the first adhesion layer is less than an extent of the first surface, and (ii) an extent of the first encapsulation layer is less than the extent of the first surface.