Variable inductor and method for adjusting inductance of same
AssigneesFujitsu Limited, Kazuya Masu, Akira Shimokohbe, Seiichi Hata
InventorsKazuya Masu, Akira Shimokohbe, Seiichi Hata, Yoshio Satoh, Fumio Yamagishi
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Abstract
A variable inductor includes an insulating substrate (1), a thermally softenable spiral coil (2) provided on the insulating substrate (1), and a pair of input/output terminals (3, 4) each connected electrically to a respective end of the coil (2). Preferably, the coil (2) is made from a non-crystalline thin film metallic glass which softens in a supercooled liquid phase.
Claims17
A variable inductor comprising:
- a substrate;
- a thermally softenable spiral coil provided on said substrate and including two ends fixed to said substrate;
- and a pair of input/output terminals electrically connected to said ends of said coil, respectively;
- wherein said coil is made from a non-crystalline thin film metallic glass which softens in a supercooled liquid phase;
- and
- wherein a portion of said coil other than said two ends is separated from said substrate for floating.
A method for adjusting the inductance of a variable inductor comprising an insulating substrate, a thermally softenable spiral coil provided on said insulating substrate and including two ends fixed to said substrate, and a pair of input/output terminals electrically connected to said ends of said coil, respectively, a portion of said coil other than said two ends being separated from said substrate for floating, said method comprising, at the least, the steps of:
- compressing or extending said floating portion of said coil, thereby changing a height thereof;
- and
- heating said coil to a softening temperature thereof after the change of the height followed by cooling to set an initial height of said coil.
Dependencies are inferred from the claim text.