Transformer and associated method of making

• US 7,449,987 B2
• Filed: 07/06/2006
• Issued: 11/11/2008
• Est. Priority Date: 07/06/2006
• Status: Expired due to Fees

• Current Assignee: North South Holdings Incorporated (Spherix Incorporated)
• Original Assignee: Harris Corporation (L3Harris Technologies, Inc.)
• Inventors: Snyder, Steven R.
• Primary Examiner(s): Mai; Anh T
• Application Number:
  US11/428,947
• Publication Number:
  US 20080007382A1
• Time in Patent Office: 859 Days
• Field of Search: 336/200, 336/223, 336/232
• US Class Current: 336/200
• CPC Class Codes: H01F 27/2804 Printed windings
• CPC Class Codes: H01F 30/04 having two or more secondary windings, each supplying a separate load, e.g. for radio set power supplies
• CPC Class Codes: H01F 41/041 Printed circuit coils apparatus or processes for manufacturing printed circuits in general H05K3/00
• CPC Class Codes: Y10T 29/4902 Electromagnet, transformer or inductor
• CPC Class Codes: Y10T 29/49073 by assembling coil and core

Abstract

A transformer and method of making same is disclosed. A substantially planar configured, first half primary winding and first half secondary winding are formed over a substantially planar base. The first half primary and secondary windings are overlaid with a ferrite layer. A substantially planar configured, second half primary winding and second half secondary winding are formed over the ferrite layer in stacked relation to the respective first half primary winding and secondary windings. The respective first and second half primary windings and respective first and second half secondary windings are interconnected together.

Claims

1. A transformer comprising:

a substantially planar base;

a substantially planar configured first half primary winding and first half secondary winding as metallic circuits and supported by the substantially planar base and formed as a plurality of linear lines such that secondary windings are positioned in spaced, substantially parallel relation to the primary windings;

at least one ferrite layer formed over the first half primary winding and first half secondary winding;

a substantially planar configured second half primary winding and second half secondary winding formed as a plurality of linear lines parallel to each other over the ferrite layer in stacked relation to respective first half primary and secondary windings and interconnected together and forming a substantially rectangular configured transformer structure on a common core.

2. The transformer according to claim 1, wherein said base is formed from a thick film ceramic material.

3. The transformer according to claim 1, wherein said base is formed from an unfired ferrite tape.

4. The transformer according to claim 1, wherein said primary and secondary windings comprise printed circuit patterns.

5. The transformer according to claim 1, wherein said printed circuit patterns forming second half primary and secondary windings overlap a ferrite layer to interconnect respective first half primary and secondary windings.

6. The transformer according to claim 1, and further comprising conductive vias interconnecting said first and second half primary windings and first and second half secondary windings.

7. A transformer comprising:

a thick film ceramic substrate;

a first half primary winding formed as a metallic circuit and a plurality of parallel, linear lines on the thick film ceramic substrate;

a ferrite layer formed over the first half primary winding;

a second half primary winding formed as a plurality of parallel, linear lines on the ferrite layer and interconnecting said first half primary winding such that the linear lines of first and second half primary windings are in parallel relation to each other;

a dielectric material formed over the second half primary winding;

a first half secondary winding formed as a metallic circuit and a plurality of parallel, linear lines on the dielectric material;

a second ferrite layer formed over the first half secondary winding; and

a second half secondary winding formed as a metallic circuit and a plurality of parallel, linear lines on the ferrite layer and interconnecting said first half secondary winding such that the linear lines of first and second half secondary windings are in parallel relation to each other and forming a substantially rectangular configured transformer structure on a common core.

8. The transformer according to claim 7, wherein said second half primary and secondary windings are overprinted on the respective ferrite layers to interconnect said first half primary and secondary windings.

9. The transformer according to claim 7, and further comprising conductive vias formed within said ferrite layers and interconnecting said first half primary and secondary windings and respective second half primary and secondary windings.

10. A transformer comprising:

an unfired ferrite tape;

first half primary and secondary windings as metallic circuits on the unfired ferrite tape such that the secondary windings are received in spaced relation to the primary windings and formed as a plurality of linear lines such that the secondary windings are positioned in spaced, substantially parallel relation to the primary windings;

a ferrite layer formed on the first half primary and secondary windings and having conductive vias that interconnect ends of first half primary and secondary windings;

second half primary and secondary windings as metallic circuits on the ferrite layer and a plurality of linear lines parallel to each other such that ends of the windings engage conductive vias wherein said windings are interconnected together by said conductive vias and forming a substantially rectangular configured transformer structure on a common core.

11. The transformer according to claim 10, wherein said conductive vias are formed as plated through holes.