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[March 2003]
Commercialisation of 1mm-thick, 10.7MHz Ceramic Filters
Murata Manufacturing Co Ltd has introduced a 10.7MHz ceramic filter with a thickness of 1mm or less, making the filter suitable for thin wireless communications and radio equipment.The SFECD10M7 series is nominally 3.45mm x 3.1mm x 1mm and SMD. At this size, they are said to provide the lowest profile body in the industry; two-thirds of the thickness of Murata's conventional models, which are around 1.5mm thick.
This development has been made possible by the adoption of a thin exterior substrate made of an improved ceramic material that provides enhanced strength. These ceramic filters are suitable for equipment requiring reduced thickness, such as card PHS modules and FM radio sets.
Murata says that because they provide significantly enhanced reliability through material and structural improvements, they can withstand use in automotive electronic equipment such as one or two-way remote keyless entry and tyre pressure monitoring systems.
These ceramic filters can be mounted with lead-free solder - for example, Sn-Ag-Cu solder - and can be reflow soldered at up to 260°C.
Murata will begin mass production with a model providing an intermediate frequency of 10.7MHz and a 3dB bandwidth of 280kHz and will then expand the product line-up to offer a variety of intermediate frequencies and 3dB bandwidths.
Production quantities were predicted by Murata to reach 2 million units per month by September 2003, having started recently at 1 million units per month.
ENDS