# US 7,745,729 B2 · Conductive connection and cutting method thereof

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- Number: US 7,745,729 B2
- Document ID: US7745729B2
- Status: Granted
- Kind: B2
- Application number: 11/668,728
- Filed: 2007-01-30
- Published: 2008-01-10
- Granted: 2010-06-29
- Earliest claimed: 2006-07-06
- Assignees: Au Optronics Corporation
- Inventors: Shuo-hsiu Hu
- Web page: https://patentgrep.com/patent/US7745729B2

## CPC

- H05K 1/0256: {Electrical insulation details, e.g. around high voltage areas}
- G02F 1/13452: {Conductors connecting driver circuitry and terminals of panels}
- H05K 1/0393: {Flexible materials (H05K1/038 takes precedence; specific organic compositions are classified in H05K1/0313 and subgroups)}
- H05K 3/0052: {Depaneling, i.e. dividing a panel into circuit boards; Working of the edges of circuit boards}
- H05K 2201/09145: Edge details
- H05K 2203/162: Testing a finished product, e.g. heat cycle testing of solder joints
- H05K 2203/175: Configurations of connections suitable for easy deletion, e.g. modifiable circuits or temporary conductors for electroplating; Processes for deleting connections
- H05K: PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- G02F: OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS

## Abstract

A conductive connection such as a flexible printed circuit board (FPC) or flexible flat cable is disclosed. The conductive connection has a substrate and conductive wires provided on the substrate. After the conductive connection is cut to be put into application, ends of the wires extend out of an edge of the substrate due to the cutting. In accordance with the present invention, the substrate edge from which the wire ends extend out has protrusions provided. Accordingly, when the conductive connection is applied to a flat display of a mobile phone, for example, short circuit resulting from the wire ends extending out of the substrate edge improperly contacting metal portion of other phone parts is avoided.

## Claims

### Claim 1

A conductive connection comprising:
a substrate having at least one protrusion at an edge; and
a plurality of wires disposed on the substrate, wire-ends of the wires extending out of the edge of the substrate, wherein a length of the protrusion exceeds a length of the wire-ends extending out of the edge.

### Claim 2 (depends on 1)

The conductive connection of claim 1, wherein the substrate has a plurality of protrusions at the edge.

### Claim 3 (depends on 1)

The conductive connection of claim 1, wherein each protrusion is disposed at a position of the edge where no wire extends.

### Claim 4 (depends on 1)

The conductive connection of claim 1, wherein a shape of the protrusion comprises rectangular.

### Claim 5 (depends on 1)

The conductive connection of claim 1, wherein a shape of the protrusion comprises triangular.

### Claim 6 (depends on 1)

The conductive connection of claim 1, wherein the protrusion appears as an arc shape.

### Claim 7 (depends on 1)

The conductive connection of claim 1, wherein the conductive connection comprises a flexible printed circuit board.

### Claim 8 (depends on 1)

The conductive connection of claim 1, wherein the conductive connection comprises a flat cable.

### Claim 9

A flat display device comprising:
a display panel; and
a conductive connection electrically connected to the display panel, comprising:
a substrate having at least one protrusion at an edge; and
a plurality of wires disposed on the substrate, wire-ends of the wires extending out of the edge of the substrate, wherein a length of the protrusion exceeds a length of the wire-ends extending out of the edge.

### Claim 10

A cutting method for a conductive connection, the conductive connection having a substrate and a plurality of wires disposed on the substrate, the method comprising:
cutting the conductive connection to form at least one protrusion at an edge of the substrate and wire-ends of the wires extending out of the edge of the substrate, wherein a length of the protrusion exceeds a length of the wire-ends extending out of the edge.

### Claim 11 (depends on 10)

The method of claim 10, wherein a plurality of protrusions are formed at the edge.

### Claim 12 (depends on 10)

The method of claim 10, wherein each protrusion is formed at a position of the edge where no wire extends.

### Claim 13 (depends on 10)

The method of claim 10, wherein a shape of the protrusion comprises rectangular.

### Claim 14 (depends on 10)

The method of claim 10, wherein a shape of the protrusion comprises triangular.

### Claim 15 (depends on 10)

The method of claim 10, wherein the protrusion appears as an arc shape.

### Claim 16 (depends on 10)

The method of claim 10, wherein the conductive connection comprises a flexible printed circuit board.

### Claim 17 (depends on 10)

The method of claim 10, wherein the conductive connection comprises a flat cable.