TUNING AND MATCHING OF FILM INDUCTORS OR TRANSFORMERS WITH PARAMAGNETIC AND DIAMAGNETIC SUSPENSIONS
First Claim
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1. A method of altering the inductance of an inductive device comprising the steps of:
- measuring the inductance of said device;
selecting a suspension of either a paramagnetic material or a diamagnetic material, the material selected depending on the relationship of the measured inductance value of said device to a preselected inductance value;
incrementally applying to said device the selected materials;
allowing said selected material to harden; and
again measuring the inductance of said device and applying a suspension of the other one of the paramagnetic and diamagnetic materials until said preselected inductance value is reached, said selecting step consisting of selecting the diamagnetic material when the measured inductance value of said device is greater than the preselected inductance value.
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Abstract
Thin or thick film inductors or transformers are tuned and/or matched by the application of a blend of a paramagnetic or diamagnetic material or both mixed with a binder such as epoxy which binder matches the fabrication materials and processes of the inductors or transformers.
26 Citations
4 Claims
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1. A method of altering the inductance of an inductive device comprising the steps of:
- measuring the inductance of said device;
selecting a suspension of either a paramagnetic material or a diamagnetic material, the material selected depending on the relationship of the measured inductance value of said device to a preselected inductance value;
incrementally applying to said device the selected materials;
allowing said selected material to harden; and
again measuring the inductance of said device and applying a suspension of the other one of the paramagnetic and diamagnetic materials until said preselected inductance value is reached, said selecting step consisting of selecting the diamagnetic material when the measured inductance value of said device is greater than the preselected inductance value.
- measuring the inductance of said device;
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2. A method of altering the inductance of an inductive device comprising the steps of:
- measuring the inductance of said device;
selecting a suspension of either a paramagnetic material or a diamagnetic material, the material selected depending on the relationship of the measured inductance value of said device to a preselected inductance value;
selecting said material from a diamagnetic group of materials consisting of copper, gold, zinc and bismuth when the measured inductance value exceeds the preselected inductance value;
incrementally applying to said device the selected materials;
allowing said selected material to harden; and
again measuring the inductance of said device and applying a suspension of the other one of the paramagnetic and diamagnetic materials until said preselected inductance value is reached.
- measuring the inductance of said device;
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3. A method for decreasing the inductance of an inductive device comprising the steps of:
- measuring the inductance of said device;
incrementally applying a hardenable diamagnetic material to said device;
allowing said material to harden; and
sequentially measuring the inductance of said device and applying increments of said diamagnetic material as a function of the measured inductance value of said device relative to a preselected inductance value until said preselected inductance value is measured.
- measuring the inductance of said device;
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4. The method of claim 3 further including after the measuring step, the step of:
- selecting the diamgnetic material from the group consisting of copper, gold, zinc and bismuth.
Specification