Press Release
January 10, 2007
Epson Toyocom Adds World's Thinnest Tuning-Fork Crystal Unit to
FC Series Lineup
Epson Toyocom Corporation, the leader in quartz devices, today announced that it has begun volume production of the FC-13F ultra-thin SMD-type tuning-fork crystal unit.
Demand for thinner electronic devices continues to increase in the mobile device market led by portable media players. The FC-13F meets this demand by utilizing QMEMS*1 and high precision mounting technologies to achieve the world's thinnest* tuning-fork crystal unit with a maximum thickness of just 0.6 mm. It provides almost the same performance as the previous FC-135 model with only two-thirds the thickness.
Except for thickness, the FC-13F has the same external dimensions as the FC-135 currently in production. This enables the sharing of existing production equipment, giving the flexibility needed to meet demand for thinner devices as it increases.
In addition, the specifications for CI value (motional resistance)*2 given by crystal unit performance and accuracy given by frequency tolerance are set to the standard 80 kΩ Max. and ±20 x 10-6 to meet user needs.
*According to studies conducted by Epson Toyocom as of January 10, 2007.
Main specifications
| Item | Specifications | |
| FC-13F | FC-135 | |
| Nominal frequency range | 32.768kHz | ← |
| Frequency tolerance (standard) | ±20 x 10-6(25°C) | ← |
| Turnover temperature | 25°C±5°C | ← |
| Parabolic coefficient | -0.04 x 10-6/°C2 Max. | ← |
| Motional resistance (ESR) | 80kΩ Max. | 70kΩ Max. |
| External dimensions | 3.2 x 1.5 x 0.6mm Max. | 3.2 x 1.5 x 0.9mm Max. |
*1 QMEMS
QMEMS is a combination of "Quartz," a crystalline material with excellent characteristics such as high stability and high precision, and "MEMS" (micro electro mechanical system).
QMEMS quartz devices are created using quartz material instead of the semiconductors used by MEMS. We perform precision microfabrication on the quartz material to offer high performance in a compact package.
*2 CI value (motional resistance)
CI is the abbreviation of crystal impedance. It is the component of equivalent resistance inside the crystal unit and is equivalent to vibration loss. It indicates the ease of oscillation. It is also referred to as series resistance.
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