Planar electronic device and method for manufacturing

• US 9,440,378 B2
• Filed: 02/28/2012
• Issued: 09/13/2016
• Est. Priority Date: 05/05/2010
• Status: Expired due to Fees

• Current Assignee: TE Connectivity Corporation (TE Connectivity Limited)
• Original Assignee: Tyco Electronics Corporation (TE Connectivity Limited)
• Inventors: Dalmia, Sidharth, Harrison, William Lee
• Primary Examiner(s): Chan, Tsz
• Application Number:
  US13/407,161
• Publication Number:
  US 20120154097A1
• Time in Patent Office: 1,659 Days
• Field of Search: 336/200, 336/229, 336/232
• US Class Current: 1/1
• CPC Class Codes: B29C 39/10 incorporating preformed parts or layers, e.g. casting around inserts or for coating articles coating a surface by casting in general B05D1/30, B29C39/126 takes precedence
• CPC Class Codes: H01F 17/0033 with the coil helically wound around a magnetic core
• CPC Class Codes: H01F 2017/048 with encapsulating core, e.g. made of resin and magnetic powder
• CPC Class Codes: H01F 41/046 structurally combined with ferromagnetic material
• CPC Class Codes: Y10T 29/49124 On flat or curved insulated base, e.g., printed circuit, etc.

Abstract

A method of manufacturing a planar board substrate for receiving a magnetic core. The method includes providing a cover layer having a layer side and providing a base layer having first and second sides. The base layer includes a material hole that extends completely through the base layer between the first and second sides. The method also includes coupling the cover and base layers to each other along the first side and the layer side. The cover layer extends over at least a portion of the material hole. The method also includes providing a dielectric member within the material hole, wherein a core-holding channel exists between the dielectric member and the base layer. The core-holding channel extends circumferentially around the dielectric member and is configured to have a magnetic core therein.

Claims

1. A planar electronic device comprising:

a cover layer of substrate material;

a base layer of substrate material coupled to and extending alongside the cover layer, the base layer including a material hole that extends completely through the base layer, the cover layer extending over at least a portion of the material hole;

a magnetic core positioned in the material hole;

a dielectric member within the material hole, wherein a core-holding channel exists between the dielectric member and the base layer, the core-holding channel extending circumferentially around the dielectric member and having the magnetic core therein, wherein the core-holding channel is partially defined by an alignment feature that engages only a portion of an exterior of the magnetic core, the alignment feature being shaped from a portion of the base layer; and

a plurality of conductive loops that extend around the magnetic core and the alignment feature.

2. The planar electronic device of claim 1, wherein the material hole is defined by an inwardly-facing surface in which at least a portion of the inwardly-facing surface is a sheared surface.

3. The planar electronic device of claim 1, further comprising a substrate layer coupled to the base layer, the base layer being located between the cover layer and the substrate layer.

4. The planar electronic device of claim 1, wherein the core-holding channel is defined by an inwardly-facing surface of the base layer and an outwardly-facing surface of the dielectric member that faces the inwardly-facing surface, the alignment feature extending from one of the inwardly-facing surface or the outwardly-facing surface toward the magnetic core.

5. The planar electronic device of claim 4, wherein the alignment feature extends between and couples to a surface of the cover layer that defines a bottom of the core-holding channel and said one of the inwardly-facing surface or the outwardly-facing surface.

6. The planar electronic device of claim 4, wherein the alignment feature has a sloped surface relative to said one of the inwardly-facing surface or the outwardly-facing surface.

7. The planar electronic device of claim 1, wherein a material of the dielectric member is identical to the substrate material of the base layer and the dielectric member and the base layer have identical thicknesses.

8. A planar electronic device comprising:

a cover layer of substrate material;

a base layer of substrate material coupled to and extending alongside the cover layer, the base layer including a material hole that extends completely through the base layer, the cover layer extending over at least a portion of the material hole;

a magnetic core positioned in the material hole;

a dielectric member within the material hole, wherein a core-holding channel exists between the dielectric member and the base layer, the core-holding channel extending circumferentially around the dielectric member and having the magnetic core therein, wherein the core-holding channel is partially defined by an alignment feature that engages only a portion of an exterior of the magnetic core, the alignment feature being shaped from a portion of the cover layer; and

a plurality of conductive loops that extend around the magnetic core.

9. The planar electronic device of claim 8, wherein the alignment feature is formed from an edge of the cover layer that defines a cover hole through the cover layer, the cover hole being aligned with the material hole.

10. The planar electronic device of claim 9, further comprising a substrate layer that extends along the cover layer and covers the cover hole.

11. The planar electronic device of claim 8, further comprising an encapsulating material disposed within the material hole, the encapsulating material surrounding the magnetic core and forming the dielectric member.

12. The planar electronic device of claim 11, wherein the plurality of conductive loops extend through the dielectric member and the base layer.

13. The planar electronic device of claim 8, wherein the material hole is defined by an inwardly-facing surface in which at least a portion of the inwardly-facing surface is a sheared surface.