TUNEABLE THIN FILM INDUCTOR

• US 3,858,138 A
• Filed: 05/10/1974
• Issued: 12/31/1974
• Est. Priority Date: 03/05/1973
• Status: Expired due to Term

• Current Assignee: Jonathan Isaac Gittleman, Lawrence Matthew Zappulla
• Original Assignee: Jonathan Isaac Gittleman, Lawrence Matthew Zappulla
• Inventors: Gittleman, Jonathan Isaac, Zappulla, Lawrence Matthew
• Primary Examiner(s): Kozma, Thomas J.
• Application Number:
  US05/468,932
• Time in Patent Office: 235 Days
• Field of Search: 336/136,200,223
• US Class Current: 336/136
• CPC Class Codes: H01F 2017/0066 with a magnetic layer
• CPC Class Codes: H01F 21/06 by movement of core or part of core relative to the windings as a whole
• CPC Class Codes: H01F 27/24 Magnetic cores

Abstract

A flat inductor, one half of which is provided as a first set of parallel conductive strips printed on a substrate, each of which constitutes one half of each turn of a helix. A flat sleeve of insulating material is adherently disposed over the substrate strips leaving the ends of the strips exposed. The other half of the helix is provided as a second set of parallel conductive strips printed on the sleeve with the ends of the second set of strips contacting the exposed ends of the first set. A flat strip-like magnetic core member is slidably disposed within the sleeve.

Claims

1. A TUNEABLE FILM TYPE INDICATOR COMPRISING A FIRST SERIES OF METAL FILM STRIPES ADHERED TO AN INSULATING MATERIAL COVERING SAID SYNTHETIC RESINOUS FILM OF INSULATING MATERIAL COVERING SAID STRIPES EXCEPT THE END THEREOF, A SECOND SYNTHETIC RESINOUS FILM OF INSULATING MATERIAL OVER SAID FIRST FILM AND HAVING A CENTRAL PORTION SPACED THEREFROM, BOTH OF SAID FILMS BEING JOINED ALONG THEIR EDGES SUCH THAT BOTH FILMS TOGETHER FORM A SLEEVE, A SECOND SERIES OF METAL FILM STRIPES ON TOP OF SAID SECOND FILM OF INSULATING MATERIAL, EACH MEMBER OF SAID SECOND SERIES OF STRIPS BEING CONNECTED TO MEMBERS OF SAID FIRST SERIES OF STRIPES TO FORM A CONTINUOUS FLAT HELIX, AND A MOVEABLE MEMBER OF MAGNETIC MATERIAL DISPOSED BETWEEN SAID INSULATING FILMS, SAID MOVEABLE MEMBER COMPRISING THIN STRIP OF DIELECTRIC MATERIAL WITH A COATING OF FERROMAGNETIC MATERIAL THEREON.

2. An inductor according to claim 1 in which said ferromaganetic layer is a sputtered layer.

3. An inductor according to claim 1 in which said coating of ferromagnetic material is of variable composition.

4. An inductor according to claim 1 in which said coating of ferromagnetic material is of variable thickness.

5. An inductor according to claim 1 in which said coating of ferromagnetic materiaL is on both sides of said strip.