Transducer array having a temperature sensor isolation layer between a temperature sensor and external environment

A tumor treating field system, comprising:

• an electric field generator configured to generate an electrical signal having an alternating current waveform at a frequency in a range from 50 kHz to 1 MHz;
• a first conductive lead electrically coupled to the electric field generator, the first conductive lead configured to carry the electrical signal;
• a first transducer array coupled to the first conductive lead, the first transducer array comprising:
• an electrode layer having a first surface, a second surface opposite the first surface and having a first portion and a second portion, and an outer perimeter, the electrode layer comprising at least one electrode configured to receive the electrical signal from the electric field generator;
• a transfer layer in contact with the first surface of the electrode layer;
• a temperature sensor in contact with the first portion of the second surface of the electrode layer;
• and
• an isolation layer disposed over the temperature sensor and the first portion of the second surface of the electrode layer but not disposed over the second portion of the second surface of the electrode layer, the isolation layer resisting heat flow through the isolation layer;
• a second conductive lead electrically coupled to the electric field generator;
• and
• a second transducer array coupled to the second conductive lead, the second transducer array receiving the electrical signal from the second conductive lead, and, in conjunction with the first transducer array, forming a tumor treating field.