Theme
Research on flexible thermistors
- Fabrication of ceramic thermistor films on PET substrates
- Ultrathin thermistor sheet with the thickness of 5 micro-meters
Research Keywords
Laser, Printing method, Flexible, Sensors, Thermistors
Research Objectives
Next-generation flexible devices such as wearable devices require a variety of electronic components. Ceramic chip components have been so far mounted on flexible substrates, but from the standpoints of durability of the mounting area and realization of product design, direct functionalization of the substrate surface has been demanded. We have overcome the conventional difficulty of room temperature deposition of a wide variety of ceramics by making full use of light irradiation, and have been conducting research on the deposition of ceramic flexible sensors.
Research Results
Normally, ceramics are crystallized by heating at high temperatures, but we have focused on the energy of light and have been conducting research on crystallizing ceramic films by light irradiation. The use of light is very convenient because the energy input sites can be controlled temporally and spatially, and we have successfully crystallized oxide ceramic films at room temperature by using this feature to exert its effect only on the surface layer of functional ceramic films without damaging flexible resin substrates. The new technology has been used in wearable devices that have been the focus of much attention in recent years. Flexible thermistors are very important in wearable devices, which have been attracting attention in recent years. In this research, we succeeded in depositing a flexible thermistor film using this optical process, and fabricated an ultrathin flexible thermistor array by crystallizing thermistor oxide on a substrate as thin as 5 µm, which can follow the movement of the skin surface for wearable devices on the body surface. This achievement is expected to lead to the creation of new wearable devices and many other applications.
Links(external publications, patents, related news, etc.)
- T. Nakajima and T. Tsuchiya,“Ultrathin Highly Flexible Featherweight Ceramic Temperature Sensor Arrays”, ACS Appl. Mater. Interfaces 12, 36600 (2020).
- T. Nakajima, K. Shinoda and T. Tsuchiya, "UV-Assisted Nucleation and Growth of Oxide Films from Chemical Solutions", Chem. Soc. Rev. 43, 2027 (2014).
- 特許6684406, "カーボン山型突状体配列膜状物とその製造方法"
