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Mark Peters : April 8th 2017 - 06:28 CET

Kyocera crystal components for mobile phones


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KyoceraWorld's smallest Crystal components for mobile devices : Kyocera Crystal Device Corporation, a wholly-owned subsidiary of Kyocera Corporation specializing in the development and manufacturing of crystal devices, announced that it has developed the world’s smallest crystal unit for smartphones. Samples will be available in May 2017 with mass production slated for early 2018. The new CX1008 quartz crystal unit measures just 1.0 x 0.8mm yet delivers the same electrical characteristics as Kyocera’s conventional CX1210 model, enabling it to be adopted without circuit board revision. Crystal components are used to generate highly stable reference signals in digital circuits, based on the unique material characteristic of quartz to oscillate at a precise frequency when a specific voltage is applied.
Smaller mobile phones

Smaller mobile phones
The trend toward smaller phones requires smaller, better-performing crystal components. Traditionally, however, it was believed that miniaturizing crystal components beyond a certain point would compromise their performance, since electrical characteristics degraded as the electronic device became smaller. Kyocera has succeeded in downsizing the crystal components while maintaining its electrical characteristics - with its current CX1210 (1.2x1.0mm) device, and now, by commercializing the ultra-small CX1008 (1.0x0.8mm) crystal unit. This has been accomplished through crystal element design technology developed exclusively by Kyocera, along with a process that Kyocera developed jointly with Associate Professor Kazuya Yamamura of Osaka University. Based on this new technology, Kyocera will accelerate the development of new low-frequency, high-frequency and high-precision oscillators for such applications as automotive electronics, Advanced Driver Assistance System (ADAS) technologies, Internet of Things devices, wireless network base stations and 5G mobile communications.

Kyocera phone components

Kyocera crystal components
Downsizing from 1.2x1.0mm to 1.0x0.8mm would ordinarily increase equivalent series resistance (CI value) by approximately 30 percent, requiring circuit board revision. By optimizing the design using its own piezoelectric analysis technology, Kyocera has downsized this device to 1.0 x 0.8mm while maintaining the electrical characteristics of the conventional CX1210 crystal unit. This allows the CX1008 to be incorporated into existing circuit designs without revision. With conventional processes and technologies, a crystal components exhibits higher levels of variation in key electrical characteristics when produced in smaller dimensions. However, Kyocera has avoided this by applying ultra-high-precision processing developed with Yamamura. This method, using plasma-generated neutral radicals and a chemical reaction at the surface of an object, enables to control a quartz crystal with highly precise surface conditions and thickness. Kyocera’s proprietary semiconductor processing technology ensures extremely accurate external dimensions, and minimal variation in equivalent series resistance, for optimal performance at reduced size.




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