Variable inductor
AssigneeMurata Manufacturing Co., Ltd.
InventorsNaoki Iida, Masahiko Kawaguchi
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Abstract
A variable inductor includes an input external electrode, an output external electrode, and a coil formed by electrically connecting at least two spiral coil pattern portions in series between the input external electrode and the output external electrode. At least one trimming electrode is further provided in each of the spiral coil pattern portions. A first end and a second end of each trimming electrode are connected to the spiral coil pattern portion, and a lead out electrode, respectively, so that the trimming electrode bridges between the lead out electrode and the coil. The trimming electrodes are sequentially trimmed one-by-one, by, for example, irradiating a laser beam, starting from a trimming electrode closer to an edge, whereby the inductance of the coil is increased accordingly.
Claims10
A variable inductor comprising:
- an input external electrode;
- an output external electrode;
- a coil defined by at least two spiral coil pattern portions electrically connected in series between said input external electrode and said output external electrode;
- at least one trimming electrode provided in each of said at least two spiral pattern portions, each trimming electrode having a first end connected to a respective one of said at least two spiral coil pattern portions;
- and
- a lead out electrode connected to a second end of each of said trimming electrodes;
- wherein said lead out electrode is connected to one of said input external electrode and said output external electrode.
Dependencies are inferred from the claim text.