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JRC develops, designs, produces, and sells SAW filters for use as key devices in radio communication equipment. Almost all SAW filters are custom-made, and we realize products meeting this variety of customer needs quickly by having the manufacturing department participate in the development and design stage and works on the manufacturing process as the product is being designed. In the typical manufacturing process of commercial narrow-band SAW filters there is large manufacturing variation leading to decreased yields, but now, new center frequency trimming technology of filter elements during manufacturing has made it possible to increase yields and achieve steady production. This paper will provide an outline of this frequency trimming technology.

Hiroyuki Arai
Takayuki Inaoka