Bodić Milan Z, Aleksić Stanko O, Rajs Vladimir M, Damnjanović Mirjana S, Kisić Milica G
Faculty of Technical Sciences, University of Novi Sad, 21102 Novi Sad, Serbia.
Institute of Nuclear Sciences-INN Vinca, 11351 Belgrade, Serbia.
Sensors (Basel). 2024 May 31;24(11):3547. doi: 10.3390/s24113547.
Negative temperature coefficient (NTC) chip thermistors were thermally coupled to form a novel device (TCCT) aimed for application in microelectronics. It consists of two NTC chip thermistors Th and Th, which are small in size (0603) and power (1/10 W). They are in thermal junction, but concurrently they are electrically isolated. The first thermistor Th generates heat as a self-heating component at a constant supply voltage U (input thermistor), while the second thermistor Th receives heat as a passive component (output thermistor). The temperature dependence R(T) of NTC chip thermistors was measured in the climatic test chamber, and the exponential factor B of thermistor resistance was determined. After that, a self-heating current I of the input thermistor was measured vs. supply voltage U and ambient temperature T as a parameter. Input resistance R was determined as a ratio of U and I while output thermistor resistance R was measured by a multimeter concurrently with the current I. Temperatures T and T of both thermistors were determined using the Steinhart-Hart equation. Heat transfer, thermal response, stability, and inaccuracy were analyzed. The application of thermally coupled NTC chip thermistors is expected in microelectronics for the input to output electrical decoupling/thermal coupling of slow changeable signals.
负温度系数（NTC）芯片热敏电阻通过热耦合形成一种新型器件（TCCT），旨在应用于微电子领域。它由两个NTC芯片热敏电阻Th和Th组成，尺寸小（0603）且功率低（1/10 W）。它们处于热结状态，但同时电隔离。第一个热敏电阻Th在恒定电源电压U下作为自热元件产生热量（输入热敏电阻），而第二个热敏电阻Th作为无源元件接收热量（输出热敏电阻）。在气候试验箱中测量了NTC芯片热敏电阻的温度依赖性R(T)，并确定了热敏电阻电阻的指数因子B。之后，以电源电压U和环境温度T为参数，测量了输入热敏电阻的自热电流I。输入电阻R被确定为U与I的比值，而输出热敏电阻电阻R由万用表在测量电流I的同时进行测量。两个热敏电阻的温度T和T使用Steinhart-Hart方程确定。分析了热传递、热响应、稳定性和不准确性。热耦合NTC芯片热敏电阻有望在微电子领域用于慢变信号的输入到输出的电气去耦/热耦合。
