Inductance element, laminated electronic component, laminated electronic component module and method for producing these element, component and module

• US 7,081,803 B2
• Filed: 01/30/2004
• Issued: 07/25/2006
• Est. Priority Date: 01/31/2003
• Status: Expired due to Fees

• Current Assignee: TDK Corporation
• Original Assignee: TDK Corporation
• Inventors: Endo, Toshikazu, Takaya, Minoru
• Primary Examiner(s): Nguyen, Tuyen T
• Application Number:
  US10/767,373
• Publication Number:
  US 20040183645A1
• Time in Patent Office: 907 Days
• Field of Search: 336/65, 336/83, 336/200, 336/232, 257/531
• US Class Current: 336/200
• CPC Class Codes: H01F 17/0033 with the coil helically wound around a magnetic core
• CPC Class Codes: H01F 41/041 Printed circuit coils apparatus or processes for manufacturing printed circuits in general H05K3/00
• CPC Class Codes: H01L 2224/48091 Arched
• CPC Class Codes: H01L 2224/48227 connecting the wire to a bond pad of the item
• CPC Class Codes: H01L 2924/00014 the subject-matter covered by the group, the symbol of which is combined with the symbol of this group, being disclosed without further technical details
• CPC Class Codes: H01L 2924/19105 in a side-by-side arrangement on a common die mounting substrate
• CPC Class Codes: H05K 1/165 incorporating printed inductors
• CPC Class Codes: H05K 2201/097 Alternating conductors, e.g. alternating different shaped pads, twisted pairs; Alternating components
• CPC Class Codes: H05K 3/4602 characterized by a special circuit board as base or central core whereon additional circuit layers are built or additional circuit boards are laminated

Abstract

A laminated electronic component including at least one inductance element and produced from a laminate having electrical insulators and electrical conductors laminated alternately. The inductance element is formed as a helical coil having a plurality of turns each constituted by four sides. The inductance element has pairs of parallel conductor pieces and pairs of bridging conductor pieces. Each pair of parallel conductor pieces form two of the four sides of one turn of the coil. Each pair of bridging conductor pieces form the other two sides of one turn of the coil. Grooves are formed in the laminate to thereby form the parallel conductor pieces. The grooves are filled with an electrically insulating material. The bridging conductor pieces are formed on the electrically insulating material.

Claims

1. An inductance element produced from a laminate having electrical insulators and electrical conductors laminated alternately, said inductance element comprising a helical coil having a plurality of turns each constituted by four sides, wherein:

two of said four sides of each turn of the coil are formed as two parallel conductor pieces when said laminate is processed so that a plurality of slots are formed in said laminate or a plurality of grooves are formed in said laminate and bottoms of said grooves are removed;

said grooves formed in the laminating direction by said processing are filled with an electrically insulating material;

the other two sides of each turn of the coil are formed as two bridging conductor pieces which are formed on said electrically insulating material packed in said grooves so that end portions of said two parallel conductor pieces formed by said processing are connected to each other by said two bridging conductor pieces to thereby form said helical coil; and

top, bottom and side surfaces of said element are covered with electrically insulating layers respectively while external connecting terminal electrodes are provided on portions where part of said electrically insulating layers are removed.

2. An inductance element according to claim 1, wherein said inductance element is formed as an array of inductance elements.

3. An inductance element according to claim 1, wherein said inductance element has an antenna function.

4. An inductance element according to claim 1, wherein said inductance element forms a transformer.

5. An inductance element according to claim 1, wherein said electrical insulators, said electrically insulating material and said electrically insulating layers are made of either of a resin material and a composite material as a mixture of a resin and functional material powder.

6. An inductance element according to claim 1, wherein said parallel conductor pieces are made of either of a metal plate and a sheet of metal foil whereas said bridging conductor pieces are formed by photolithography.