Method of constructing an LC network

• US 4,555,291 A
• Filed: 05/17/1984
• Issued: 11/26/1985
• Est. Priority Date: 04/23/1981
• Status: Expired due to Term

• Current Assignee: Minnesota Mining and Manufacturing Co (3M Company)
• Original Assignee: Minnesota Mining and Manufacturing Co (3M Company)
• Inventors: Harklau, Lanny L., Tait, William C.
• Primary Examiner(s): Weston, Caleb
• Application Number:
  US06/611,093
• Time in Patent Office: 558 Days
• Field of Search: 156/250, 156/263, 156/264, 156/267, 333/138, 333/140, 333/175, 333/185, 336/69, 336/200, 336/205, 336/208, 336/232
• US Class Current: 156/250
• CPC Class Codes: H03H 1/00 Constructional details of impedance networks whose electrical mode of operation is not specified or applicable to more than one type of network constructional details of electromechanical transducers H03H9/00
• CPC Class Codes: H03H 3/00 Apparatus or processes specially adapted for the manufacture of impedance networks, resonating circuits, resonators
• CPC Class Codes: H05K 3/202 using self-supporting metal foil pattern
• CPC Class Codes: Y10T 156/1052 with cutting, punching, tearing or severing
• CPC Class Codes: Y10T 156/1074 Separate cutting of separate sheets or webs
• CPC Class Codes: Y10T 156/108 Flash, trim or excess removal

Abstract

A method of constructing an LC network, and the resulting LC network manufactured by cutting and removing a predetermined pattern from a first and a second conductive sheet, leaving on each sheet a generally coil-like configuration of windings with a sufficient number of interconnections between the adjacent windings to add rigidity to the sheets, laminating these conductive sheets to opposing faces of a non-conductive sheet, thereby forming at least one capacitor, cutting and removing a pre-determined pattern from the lamination eliminating at least some of the interconnections and leaving a conductive path on the conductive sheets which is in the configuration of a coil.

Claims

1. A method of constructing an LC network comprising,

cutting and removing a predetermined pattern from a first conductive sheet, leaving a conductive path having an essentially coil-like configuration of windings with a plurality of interconnections between the adjacent windings of the configuration, which interconnections add rigidity to the conductive sheet,

cutting and removing a predetermined pattern from a second conductive sheet, leaving a conductive path having as essentially coil-like configuration of windings with a plurality of interconnections between the adjacent windings of the configuration, which interconnections also add rigidity to the second conductive sheet,

forming at least one capacitor by orienting the first and second conductive sheets with respect to each other and laminating these conductive sheets to opposing faces of a non-conductive sheet with at least one portion of the conductive paths on the first conductive sheet substantially aligned with at least one portion of the conductive paths on the second conductive sheet, but with the aligned portions separated from each other by the non-conductive sheet, and,

cutting from the lamination formed by said above steps to eliminate at least some of the interconnections between the adjacent spirals on each of the conductive sheets, and leaving at least one continuous portion of the conductive path on the conductive sheets which is in the configuration of a coil and in which the adjacent windings are no longer interconnected.

2. A method of constructing an LC network according to claim 1, comprising

cutting and removing two identical said predetermined patterns from different portions of a longitudinal web of conductive material,

separating said different portions from the web to provide said first and second conductive sheets having said interconnected coil-like configuration therein, and

rotating one of said separated sheets 180 degrees with respect to an axis parallel with one leg of its outer winding prior to laminating said sheets to said non-conductive sheet.

3. A method of constructing a substantially planar multi-turn inductor comprising:

(a) applying a first cutting means to a conductive sheet to cut therefrom a first discontinuous predetermined pattern, forming therein a multi-turn, essentially spiral-like configuration, having a plurality of interconnecting regions between adjacent turns of the spiral-like configuration, which interconnecting regions add rigidity to the thus configured sheet,

(b) laminating one surface of the configured sheet to a surface of a sheet of dielectric material, and

(c) applying a second cutting means to the laminate formed via the preceeding step to cut therefrom another discontinuous predetermined pattern which includes most of the interconnecting regions between the adjacent turns of the first discontinuous pattern, leaving in the configured conductive sheet at least one continuous portions of the spiral-like configuration with no interconnecting regions to thereby complete said multi-turn inductor.

4. A method according to claim 3, comprising:

(d) applying a cutting means to a second conductive sheet to cut therefrom another discontinuous predetermined pattern, forming therein another multi-turn essentially spiral-like configuration having a plurality of interconnecting regions between adjacent turns of the spiral-like configuration, which interconnecting regions also add rigidity to the thus configured second sheet

forming at least one capacitor by orienting the first and second conductive sheets with respect to each other and laminating these conductive sheets to opposing faces of said sheet of dielectric material with at least one portion of the conductive paths on the first conductive sheet substantially aligned with at least one portion of the conductive paths on the second conductive sheet, but with the aligned portions separated from each other by the dielectric sheet, and,

applying said cutting means to the capacitive lamination formed by said above steps, thereby eliminating at least some of the interconnections between the adjacent spirals on each of the conductive sheets, and leaving at least one continuous portion of the conductive path on the conductive sheets which is in the configuration of a coil and in which the adjacent windings are no longer interconnected to thereby form an inductive-capacitive (LC) network.

5. A method of constructing an LC network according to claim 4, comprising

cutting and removing two identical said predetermined patterns from different portions of a longitudinal web of conductive material,

separating said different portions from the web to provide said first and second conductive sheets having said interconnected coil-like configuration therein, and

rotating one of said separated sheets 180 degrees with respect to an axis parallel with one leg of its outer winding prior to laminating said sheets to said non-conductive sheet.