Michael Faraday (1791-1867), a British chemist and physicist, is best known for his use of Ag 2 S (silver sulfide) in electromagnetic induction and electrochemistry, which can be considered the first to record the semiconductor behavior of NTC thermistors.
Because the early thermistor resistors were difficult to produce and technical applications were limited, commercial production and use of thermistor resistor did not start until 100 years later. In the early 1940s, Bell Telephone Laboratories developed technology to improve the consistency and repeatability of the manufacturing process. The first commercial thermistor resistors were of the ceramic type, and according to today's standards, their tolerances were quite wide. These devices are mainly used for regulation, protection, and temperature compensation of electronic circuits.
In the 1950s and 1960s, the expansion of the aerospace industry's needs for more accurate and stable equipment led to several improvements in materials used to make glass beads and optical disc negative coefficient resistor. In the 1960s and 1970s, the demand for high-rolling tight tolerance equipment at a lower cost drove the development of chip thermistors.
As the reliability of these devices increased in the 1980s, the use of electronic smart sensors in healthcare industry increased. The rising cost of sterilization and concerns about cross-infection between patients has resulted in inexpensive disposable temperature probes, for which chip thermistors are very suitable for the demand. Throughout the 1980s and 1990s, the use of NTC thermistors continued to grow in the automotive, food processing, medical, HVAC, and telecommunications markets.
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