High Temperature Ceramic Capacitors for Deep Well Applications

Temperature requirements for ceramic capacitors have increased significantly with recent advances in deep-well drilling technology. Increasing demand for oil and natural gas has driven the technology to deeper and deeper deposits resulting in extreme temperature environments up to 200°C and above. A novel capacitor solution utilizing temperature-stable base-metal electrode capacitors in a molded and leaded package addresses the growing market high temperature demands of (1) capacitance stability, (2) long service life, and (3) mechanical durability. A range of hightemperature C0G capacitors capable of meeting this 200°C and above high temperature environment has been developed. This paper will review the electrical, reliability, and mechanical performance of this new capacitor solution.