Flexible layer for use in a tumor treating fields transducer

A transducer apparatus for delivering tumor treating fields to a subject's body, the transducer apparatus comprising:

• an array of one or more electrode elements, the array configured to be positioned over the subject's body with a front face of the array facing the subject's body;
• an anisotropic material layer electrically coupled to the array and located on a front side of the front face of the array, the anisotropic material layer comprising a front face and a back face, the back face facing the array;
• and
• a foam layer coupled to the front face of the anisotropic material layer,
• wherein when viewed from a direction perpendicular to the front face of the anisotropic material layer, at least a portion of the foam layer is disposed about a perimeter of the anisotropic material layer.

A transducer apparatus for delivering tumor treating fields to a subject's body, the transducer apparatus comprising:

• an array of one or more electrode elements, the array configured to be positioned over the subject's body with a front face of the array facing the subject's body;
• an anisotropic material layer electrically coupled to the array and located on a front side of the front face of the array, the anisotropic material layer comprising a front face and a back face, the back face facing the array;
• and
• a foam layer coupled to the front face of the anisotropic material layer,
• wherein the anisotropic material layer comprises at least one slit extending from a perimeter of the front face of the anisotropic material layer towards an interior portion of the front face of the anisotropic material layer or at least one hole extending from the front face to the back face of the anisotropic material layer,
• wherein when viewed from a direction perpendicular to the front face of the anisotropic material layer, the foam layer covers the at least one slit or hole of the anisotropic material layer.