# US 2014/0197918 A1 · Transformer using symmetrical printing pattern

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- Number: US 2014/0197918 A1
- Document ID: US20140197918A1
- Status: Published application
- Kind: A1
- Application number: 14/342,788
- Filed: 2011-11-07
- Published: 2014-07-17
- Earliest claimed: 2011-09-05
- Assignees: Soongsil University Research Consortium Techno-Park
- Inventors: Byung Joo Kang; Sung Hun Ahn; Ho Yong Hwang; Chang Kun Park
- Web page: https://patentgrep.com/patent/US20140197918A1

## CPC

- H01F 27/2804: {Printed windings}
- H05K 1/165: {incorporating printed inductors}
- H05K 3/222: {Completing of printed circuits by adding non-printed jumper connections (printed jumper connections H05K3/4685)}
- H01F 27/2814: {with only part of the coil or of the winding in the printed circuit board, e.g. the remaining coil or winding sections can be made of wires or sheets}
- H01F 27/40: Structural association with built-in electric component, e.g. fuse
- H05K 2203/049: Wire bonding
- H01F: MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H05K: PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS

## Abstract

Disclosed is a transformer using a symmetrical printing pattern which includes: a substrate; a plurality of first printing lines printed at predetermined distances on the substrate; a plurality of second printing lines printed at predetermined distances on the substrate; first bonding wires connecting the first printing lines; and second bonding wires connecting the second printing lines, in which the first printing lines and the second printing lines are printed in a symmetrical printing pattern, respectively, on the substrate, and the first bonding wires and the second bonding wires are formed symmetrically, respectively.

## Claims

### Claim 1

A transformer using a symmetrical printing pattern, comprising:
a substrate;
a plurality of first printing lines printed at predetermined distances on the substrate;
a plurality of second printing lines printed at predetermined distances on the substrate;
first bonding wires connecting the first printing lines; and
second bonding wires connecting the second printing lines,
wherein the first printing lines and the second printing lines are printed in a symmetrical printing pattern, respectively, on the substrate, and the first bonding wires and the second bonding wires are formed symmetrically, respectively.

### Claim 2 (depends on 1)

The transformer of claim 1, wherein the first printing lines and the first bonding wires form a primary coil of the transformer, and the second printing lines and the second bonding wires form a secondary coil of the transformer.

### Claim 3 (depends on 1)

The transformer of claim 1, wherein the first printing lines and the second printing lines are alternately printed at predetermined distances on the substrate.

### Claim 4 (depends on 1)

The transformer of claim 1, wherein the first printing line and the second printing line each include coil printing lines and a connection printing line.

### Claim 5 (depends on 4)

The transformer of claim 4, wherein the coil printing lines are printed in the shape of ‘——’ or ‘/ \’ on the substrate.

### Claim 6 (depends on 4)

The transformer of claim 4, wherein the connection printing line is printed in the same length and in the same direction as the coil printing lines on the substrate.

### Claim 7 (depends on 4)

The transformer of claim 4, wherein the connection printing line is printed shorter than the coil printing lines on the substrate.

### Claim 8 (depends on 4)

The transformer of claim 4, wherein the connection printing line is printed longer than the coil printing lines on the substrate.

### Claim 9 (depends on 8)

The transformer of claim 8, wherein the connection printing line is printed in a loop on the substrate.