# US 2019/0245286 A1 · Pressure adaptive contact structure for flexible circuit board

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- Number: US 2019/0245286 A1
- Document ID: US20190245286A1
- Status: Published application
- Kind: A1
- Application number: 16/387,833
- Filed: 2019-04-18
- Published: 2019-08-08
- Earliest claimed: 2017-08-25
- Assignees: Advanced Flexible Circuits Co., Ltd.
- Applicants: Advanced Flexible Circuits Co., Ltd.
- Inventors: CHIH-HENG CHUO; KUO-FU SU
- Web page: https://patentgrep.com/patent/US20190245286A1

## CPC

- H01R 12/65: characterised by the terminal
- G01R 31/2818: {using test structures on, or modifications of, the card under test, made for the purpose of testing, e.g. additional components or connectors (G01R31/2805 takes precedence; printed circuits having, e.g. symbols, test patterns or visualisation means H05K1/0266)}
- H01R 12/613: {by means of interconnecting elements}
- H01R 12/69: deformable terminals, e.g. crimping terminals
- H01R 12/79: connecting to rigid printed circuits or like structures
- H05K 1/028: {Bending or folding regions of flexible printed circuits (H05K1/0283 takes precedence)}
- H05K 1/0281: {Reinforcement details thereof}
- H05K 1/118: {specially for flexible printed circuits, e.g. using folded portions}
- H05K 3/365: {by abutting, i.e. without alloying process}
- G01R 31/2808: {Holding, conveying or contacting devices, e.g. test adapters, edge connectors, extender boards (probe, multiprobe, probe manipulator or probe fixture G01R1/067)}
- H05K 2201/09409: Multiple rows of pads, lands, terminals or dummy patterns; Multiple rows of mounted components
- H05K 2201/09445: Pads for connections not located at the edge of the PCB, e.g. for flexible circuits
- H01R: ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- G01R: MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES (indicating correct tuning of resonant circuits H03J3/12)
- H05K: PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS

## Abstract

A pressure adaptive contact structure for a flexible circuit board is disclosed, in which the flexible circuit board is provided with a weakening portion or a partly surrounding weakening portion between a plurality of first contact pads so that contact surfaces of the plurality of first contact pads are respectively contactable with corresponding ones of contact points to generate contact pressing forces applied to the contact points in a manner that the contact pressing forces are adaptively adjustable by the weakening portion to accommodate height differences between adjacent ones of the first contact pads to prevent the first contact pads from being stretched and pulled with respect to each other.

## Claims

### Claim 1

A contact structure for a flexible circuit board, the flexible circuit board including a plurality of first contact pads formed on a substrate of the flexible circuit board spaced from each other, a spacing zone arranged between adjacent ones of the plurality of first contact pads, the contact structure comprising:
at least one protection layer formed on the substrate; and
a plurality of partly surrounding weakened portions formed in the spacing zone between adjacent ones of the first contact pads, the partly surrounding weakened portions partly surrounding a circumference of each of the first contact pads respectively, contact surfaces of the plurality of first contact pads respectively maintaining contact with corresponding contact points of a contacting circuit board in adaptively adjustable manner to accommodate height differences between adjacent ones of the first contact pads, the partly surrounding weakened portions preventing the flexible circuit board about the first contact pads from being stretched and pulled.

### Claim 2 (depends on 1)

The contact structure according to claim 1, wherein the plurality of first contact pads are each provided with a first raised portion that is formed on and raised and projecting from the first contact pad.

### Claim 3 (depends on 1)

The contact structure according to claim 1, further comprising a plurality of second contact pads, which are formed a surface of the substrate of the flexible circuit board that is opposite to the plurality of first contact pads.

### Claim 4 (depends on 3)

The contact structure according to claim 3, wherein the plurality of second contact pads are each provided with a second raised portion that is formed on and raised and projecting from the second contact pad.

### Claim 5 (depends on 1)

The contact structure according to claim 1, wherein the contacting circuit board is one of a circuit flat cable, a flexible circuit board, and a rigid circuit board.

### Claim 6 (depends on 1)

The contact structure according to claim 1, wherein each of the partly surrounding weakened portions defines a cutting line extending through both the substrate and the protection layer to be peripherally bounded thereby.

### Claim 7 (depends on 6)

The contact structure according to claim 6, wherein ends of the cutting line are each formed with a tear protection section.