EMI suppression filters
Inductors (coils), EMI suppression filters, Connectors, MEMS sensors, Thermistors, Lithium-ion batteries, etc.
Net sales (Billion yen)
For fiscal 2018, this segment achieved substantial sales growth due to growth in demand for MEMS sensors for automotive electronics, despite sluggish sales of high frequency coils for high-end smartphones. Recording sales from the lithium-ion battery business also contributed to success, with the acquisition process being completed in September 2017. As a result, overall net sales were 392.2 billion yen (up 21.7% year-on-year).
Murata’s lithium-ion batteries are classified into three types: laminated, cylindrical, and coin type batteries. Laminated type batteries are mainly employed for mobile devices including smartphones as sizes can be freely changed owing to the laminate film exterior material. Murata’s gel electrolytes have safety characteristics because they are leakage-free and do not easily swell compared to liquid electrolytes used by other companies. On the other hand, cylindrical type batteries have advantages particularly in high output applications widely used for gardening tools, power tools, electric bicycles, cleaners, and other fields. The use of coin type batteries for automotive applications and in the medical field is increasing, as their strengths of compactness and high reliability are utilized.
The competitive environment is expected to become increasingly fierce in the lithium-ion battery business, but Murata will address market needs by supplying products that combine safety and high output. In addition, by integrating storage battery modules equipped with cylindrical cells with power converter technology, etc. to provide an energy management system centered on the housing and industrial markets, we will promote utilization of natural energy.
In the future, we are planning mass production of fully solid state batteries, which are expected to act as next-generation batteries. We shall develop our business primarily around applications in areas such as wireless earphones and wearable devices, by applying the manufacturing technologies that we developed for multilayer ceramic capacitors.
EMI suppression filters
EMI suppression filters are electronic components that suppress unnecessary radio waves (noise) emitted by electronic devices. Noise is restricted by law and voluntary regulations in different countries, so measures to combat noise using EMI suppression filters are necessary to comply with these laws and regulations. Available types of EMI suppression filter include ferrite bead and other inductor types, LC composite filters and other built-in load capacitance, and common mode choke coils, and they are used in different ways in accordance with the type of noise and conditions of the circuit.
In the in-vehicle system market, which we are focusing on as a growth market, electric vehicles and self-driving technology continues to advance, so the number of EMI suppression filters used in cars is expected to continue increasing in the medium-term, and we will further enhance our range of products for the in-vehicle system market. In addition, in the communications market, new types of noise that differ from previous types will be generated by 5G, so we will expand our range of filters specialized for different applications, to address new demand. Furthermore, we shall utilize our expertise gained in collaborative measures to combat noise at electromagnetic anechoic chambers in locations around the world to effectively develop and propose new products, while also offering solutions for combating noise tailored to different applications by utilizing our design support simulation software, as we look to become an “EMI solutions provider” that adapts to the times.