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Epson Toyocom thinnest quartz crystal unit
Ralf Jurrien : February 2nd 2007 - 22:44 CET
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EpsonEpson Toyocom thinnest quartz crystal unit : Epson Toyocom Corporation, the leader in quartz devices, 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 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.
Epson Toyocom thinnest quartz crystal unitEspon quartz crystal unit
This enables the sharing of existing production equipment, giving the flexibility needed to meet the increasing demand for thinner devices. In addition, the specifications for CI value (motional resistance) 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.

Epson FC-13F - Specifications
• Nominal frequency range - 32.768 kHz
• 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) - 80 kΩ Max.
• External dimensions - 3.2 x 1.5 x 0.6 mm Max.

Epson FC-135 - Specifications
• Nominal frequency range - 32.768 kHz
• 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) - 70 kΩ Max.
• External dimensions - 3.2 x 1.5 x 0.9 mm Max.

Quartz - QMEMS
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. CI_value CI (Crystal Impedance) 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.

About Epson
Epson is a global leader in imaging products including printers, 3LCD projectors and small- and medium-sized LCDs. With an innovative and creative culture, Epson is dedicated to exceeding the vision and expectations of customers worldwide with products known for their superior quality, functionality, compactness and energy efficiency. Epson is a network of 90,701 employees in 120 companies around the world, and is proud of its ongoing contributions to the global environment and to the communities in which it is located. Led by the Japan-based Seiko Epson Corp., the Group had consolidated sales of 1549.5 billion yen in fiscal 2005.

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