Printed circuit board having three-dimensional spiral inductor and method of fabricating same

• US 7,170,384 B2
• Filed: 05/27/2005
• Issued: 01/30/2007
• Est. Priority Date: 12/30/2004
• Status: Active Grant

• Current Assignee: Samsung Electro-Mechanics Co., Ltd. (Samsung Group)
• Original Assignee: Samsung Electro-Mechanics Co., Ltd. (Samsung Group)
• Inventors: Ryu, Chang Myung, Min, Byoung Youl, Kim, Young Woo, Kim, Han, Lee, Young Jae
• Primary Examiner(s): Nguyen; Tuyen T
• Application Number:
  US11/140,680
• Publication Number:
  US 20060145805A1
• Time in Patent Office: 613 Days
• Field of Search: 336/65, 336/83, 336/200, 336/232, 361760-761
• US Class Current: 336/200
• CPC Class Codes: H01F 17/0006 Printed inductances printed coils for dynamo-electric machines H02K3/26; printed circuits H05K
• CPC Class Codes: H01F 17/0033 with the coil helically wound around a magnetic core
• CPC Class Codes: H01F 2017/002 Details of via holes for interconnecting the layers
• CPC Class Codes: H01F 5/00 Coils superconducting coils H01F6/06; fixed inductances of the signal type H01F17/00
• CPC Class Codes: H05K 1/165 incorporating printed inductors
• CPC Class Codes: H05K 2201/09536 Buried plated through-holes, i.e. plated through-holes formed in a core before lamination
• CPC Class Codes: H05K 2201/0959 Plated through-holes or plated blind vias filled with insulating material
• 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
• CPC Class Codes: H05K 3/4652 Adding a circuit layer by laminating a metal foil or a preformed metal foil pattern H05K3/4647 takes precedence

Abstract

A printed circuit board (PCB) having a three-dimensional spiral inductor, which includes a plurality of insulating layers and conductor layers. The PCB comprises a plurality of coil conductor patterns made of conductive material and shaped into strips, which is provided on the plurality of conductor layers, respectively, such that the plurality of coil conductor patterns are parallel to each other and positioned on the same plane perpendicular to the conductor layers, and in which each of the plurality of coil conductor patterns is longer than an adjacent inner coil conductor pattern.

Claims

1. A printed circuit board having a three-dimensional spiral inductor, comprising:

a plurality of coil conductor patterns provided on a plurality of conductor layers such that the plurality of coil conductor patterns are parallel to each other and positioned on a plane perpendicular to the conductor layers, and;

a plurality of conductive through holes electrically connecting the coil conductor patterns such that the plurality of coil conductor patterns and the plurality of conductive through holes form a spiral conductor all together, and wherein the plurality of coil conductor patterns are longer than an adjacent inner coil conductor pattern of the spiral conductor; and

a pair of lead out patterns connected to an inner end and an outer end of the spiral conductor to allow external power to be supplied to the spiral conductor.

2. The printed circuit board as set forth in claim 1, wherein the plurality of conductive through holes is filled with a conductive material.

3. The printed circuit board as set forth in claim 1, wherein plating layers are formed on walls of the plurality of conductive through holes.

4. The printed circuit board as set forth in claim 1, wherein each of the coil conductor patterns is wider than the adjacent inner coil conductor pattern.

5. The printed circuit board as set forth in claim 1, wherein the printed circuit board has a plurality of three-dimensional spiral inductors, each three-dimensional spiral inductor adjacently positioned and spirally extended in opposite directions and wherein the plurality of conductive through holes are provided on each of the three-dimensional spiral inductors to electrically connect them.

6. The printed circuit board as set forth in claim 1, wherein the spiral inductors positioned on two adjacent planes are spirally extended in opposite directions.

7. The printed circuit board as set forth in claim 5, wherein the plurality of three-dimensional spiral inductors adjacently positioned are spirally extended in the same direction.

8. The printed circuit board as set forth in claim 1, wherein the printed circuit board having a three-dimensional spiral inductor further comprises a plurality of insulating layers adjacent the plurality of conductor layers.