Murata Manufacturing Co., Ltd. will release new Monolithic Ceramic Capacitors (MLCC) with interposer*1 substrate to the market. This MLCC with interposer substrate is a world-first MLCC that has the same length and width (LW size) as previous MLCC. The newly developed MLCC is provided with countermeasures for squealing and can be used to replace previous MLCC without the need for modifying the printed circuit board design.
The latest electronic devices tend to generate less noise. Therefore, “squealing*2” caused by capacitor vibration (not easily audible before) has emerged as an issue in designing power supply circuits for various applications such as laptop PCs, smartphones, and digital still cameras. In June 2012, Murata introduced its MLCC with an interposer substrate (ZRA series) to the market as one of the products with countermeasures for squealing. The ZRA series uses an interposer substrate to suppress the vibration of capacitors and thus minimizes its effect imposed upon main circuit boards. Since the ZRA series uses an interposer substrate whose LW size is larger than that of MLCC, there has been a problem regarding its location on a circuit board, particularly when there are short distances between components on boards to save space and provide a smaller footprint. To resolve this problem, Murata has newly developed an MLCC with an interposer substrate (ZRB series) of the same LW size as that of an MLCC by improving technology for mounting MLCC on a small substrate. This development makes it possible to replace previous MLCCs with the new MLCC with an interposer substrate (ZRB series) that provides countermeasures for squealing without having to modify the printed circuit board design.
- The MLCC is mounted on an interposer substrate that enables it to reduce the squealing level.
- The size of this product is the same as that of previous MLCC. Therefore, currently used MLCC can be replaced with this new product without having to modify the printed circuit board design.
Mobile devices such as smartphones, PCs, digital still cameras and audio/visual devices such as television receivers
Murata plans further miniaturization in order to develop 0402-size products as well as expand the capacitance range.
Result of comparison between the measured squealing levels of the new product (ZRB18AR60J226M) , previous product (ZRA18MR60J226ME11) , and general product (GRM188R60J226MEA0)
The level of the squealing suppression effect is the same as that of previous products.
ZRB18A: L=1.6±0.2, W=0.8±0.2, T=1.0±0.2 (Unit: mm)
Mass production scheduled to start at Fukui Murata Manufacturing Co., Ltd. from August 2013.
||A kind of printed circuit board that is made to match the size of the monolithic ceramic capacitor.
||A phenomenon whereby mechanical vibration occurs when a voltage is applied to a ceramic material. Sound is emitted due to the vibration of the printed circuit board.
Murata Manufacturing Co., Ltd. is a worldwide leader in the design, manufacture and sale of ceramic-based passive electronic components & solutions, communication modules and power supply modules. Murata is committed to the development of advanced electronic materials and leading edge, multi-functional, high-density modules. The company has employees and manufacturing facilities throughout the world. For more information, visit Murata's website at www.murata.com