GB2160366A - A printed circuit board - Google Patents

A printed circuit board Download PDF

Info

Publication number
GB2160366A
GB2160366A GB08514672A GB8514672A GB2160366A GB 2160366 A GB2160366 A GB 2160366A GB 08514672 A GB08514672 A GB 08514672A GB 8514672 A GB8514672 A GB 8514672A GB 2160366 A GB2160366 A GB 2160366A
Authority
GB
United Kingdom
Prior art keywords
printed circuit
circuit board
break
out portion
main portion
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
GB08514672A
Other versions
GB2160366B (en
GB8514672D0 (en
Inventor
John Charles Cope
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
KENTON LAB Ltd
Original Assignee
KENTON LAB Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from GB848415272A external-priority patent/GB8415272D0/en
Priority claimed from GB848429780A external-priority patent/GB8429780D0/en
Application filed by KENTON LAB Ltd filed Critical KENTON LAB Ltd
Publication of GB8514672D0 publication Critical patent/GB8514672D0/en
Publication of GB2160366A publication Critical patent/GB2160366A/en
Application granted granted Critical
Publication of GB2160366B publication Critical patent/GB2160366B/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K1/00—Printed circuits
    • H05K1/02—Details
    • H05K1/14—Structural association of two or more printed circuits
    • H05K1/148—Arrangements of two or more hingeably connected rigid printed circuit boards, i.e. connected by flexible means
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H1/00—Contacts
    • H01H1/58—Electric connections to or between contacts; Terminals
    • H01H1/5805—Connections to printed circuits
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K1/00—Printed circuits
    • H05K1/02—Details
    • H05K1/14—Structural association of two or more printed circuits
    • H05K1/141—One or more single auxiliary printed circuits mounted on a main printed circuit, e.g. modules, adapters
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K1/00—Printed circuits
    • H05K1/18—Printed circuits structurally associated with non-printed electric components
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H1/00—Contacts
    • H01H1/58—Electric connections to or between contacts; Terminals
    • H01H1/5805—Connections to printed circuits
    • H01H2001/5816—Connections to flexible or curved printed circuit boards
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K2201/00—Indexing scheme relating to printed circuits covered by H05K1/00
    • H05K2201/10—Details of components or other objects attached to or integrated in a printed circuit board
    • H05K2201/10007—Types of components
    • H05K2201/10053—Switch
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K3/00—Apparatus or processes for manufacturing printed circuits
    • H05K3/0011—Working of insulating substrates or insulating layers
    • H05K3/0044—Mechanical working of the substrate, e.g. drilling or punching
    • H05K3/0052—Depaneling, i.e. dividing a panel into circuit boards; Working of the edges of circuit boards
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K3/00—Apparatus or processes for manufacturing printed circuits
    • H05K3/30—Assembling printed circuits with electric components, e.g. with resistor
    • H05K3/32—Assembling printed circuits with electric components, e.g. with resistor electrically connecting electric components or wires to printed circuits
    • H05K3/34—Assembling printed circuits with electric components, e.g. with resistor electrically connecting electric components or wires to printed circuits by soldering
    • H05K3/3447—Lead-in-hole components
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K3/00—Apparatus or processes for manufacturing printed circuits
    • H05K3/36—Assembling printed circuits with other printed circuits
    • H05K3/361—Assembling flexible printed circuits with other printed circuits
    • H05K3/363—Assembling flexible printed circuits with other printed circuits by soldering

Landscapes

  • Engineering & Computer Science (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Combinations Of Printed Boards (AREA)
  • Structure Of Printed Boards (AREA)

Abstract

A printed circuit board (2) comprises a main portion (4) and a break-out portion (6) which is adapted to be broken away from the main portion (4), the main portion and the break-out portion each having at least one component (8, 10). The break-out portion is electrically connected to the main portion by flexible wiring (16) which is provided on the side of the printed circuit board that has the components, and the components and the flexible wiring are provided with flow soldered electrical connections on the side of the printed circuit board remote from the components. The break-out portion is breakable away from the main portion to enable the break-out portion to be mounted separately from the main portion whilst still being in electrical contact with the main portion through the flexible wiring (16). All the electrical connections are made on the side of the printed circuit board remote from the components and are formable in one flow soldering operation. <IMAGE>

Description

SPECIFICATION A printed circuit board.
This invention relates to a printed ciruit board.
As is well known, printed circuit boards are provided with a plurality of components which are connected together, for example by flow soldering, on the side of the printed circuit board remote from the components. When a printed circuit board is to be connected to a separately positioned component such forexam- ple as a switch, a socket or a lamp, considerable assemblytime is required to wire the separately positioned component to the printed circuit board.
This wiring is also often difficultto do because of restricted space in which the printed circuit board and/orthe separately positioned component are mounted.
It is an aim ofthe present invention to obviate or reduce this problem.
Accordingly, this invention provides a printed circuit board having a main portion and a break-out portion which is adapted to be broken away from the main portion, the main portion and the break-out portion and the break-out portion each having at least one component, the break-out portion being electrically connected to the main portion by flexible wiring which is provided on the side of the printed circuit board that has the components, and the components and the flexible wiring being provided with flow soldered electrical connections on the side of the printed circuit board remote from the components, wherebythe break-out portion is breakable away from the main portion to enable the break-out portion to be mounted separatelyfrom the main portion whilst still being in electrical contact with the main portion and whereby all the electrical connections to be made on the side ofthe printed circuit board remote from the components are formable in one flow soldering operation.
The flow soldering operation can very simply be done over a bath of molten solder in a known manner.
The break-out portion can then be broken away and located wherever desired. The length of the flexible wiring will obviously be such as to allowthe break-out portion to be located at the desired distance away from the main portion ofthe printed circuit board.
Usually, the break-out portion will be located at one edge of the printed circuit board before it is broken away. However, generally, the break-out portion can be located wherever desired on the printed circuit board.
The break-out portion may be defined by a pair of parallel spaced apart slots and a weakened line which extends between the slots. The slots may be machine cut into the printed circuit board.
Preferably, the weakened line is provided by a score line on either side of the printed circuit board.
Usually, the flexible wiring will beflexibleflat ribbon wiring but other types of wiring, for example, individual wiring may be employed if desired.
The main portion of the printed circuit board may be provided with any desired number of components forming any desired electrical circuit.
The printed circuit board may be a rigid printed circuit board. Alternatively, the printed circuit board may be a semi-rigid or a flexible printed circuit board.
A flexible printed circuit board may advantageously be employed where the British Telecommunications Type 1000 lever switch is required to be located on a front panel of a piece of apparatus. The flexible printed circuit board can itself be bonded or otherwise connected to a main printed circuit board.
The flexible printed circuit board may be made of a polyester material, a glass-epoxy material, a fluorinated ethylene-propylenefilm material, or a combination of a polyimidefilm material with a high temperature thermosetting resin adhesive material. The combination ofthe polyimidefilm material and the high temperature thermosetting resin adhesive gives a flame retardentflexible system, and one such system is sold underthetrade mark of Kapton -thermoset.
Usually, the break-out portion will be provided with a single component such for example as a switch, a socket, a lamp or any other desired device. However, the break-out portion can also be provided with a plurality of components,for example where the break-out portion in effect forms another printed circuit.
An embodiment of the invention will now be described solely by way of example and with reference to the accompanying drawings in which: Figure 1 is a plan view ofthe printed circuit board.
Figure 2 is a side view of the printed circuit board shown in Figure 1; and Figure 3 is a side view like that of Figure 2 but shows the break-out portion in a broken away position.
Referring to the drawings, there is shown a printed circuit board 2 having a main portion 4 and a break-out portion 6. The main portion 4 is provided with a plurality of components indicated somewhat schematically as electronic components 8. The break-out portion 6 is provided with a single component 10 in the form of a switch. The switch has an ON/OFF button 11.
The break-out portion 6 is adapted to be broken awayfrom the main portion 4 by a pair of slots 12 which are machine cut into the printed circuit board 2.
A line of weakness 14 secures the break-out portion 6 to the main portion 4and is formed bya pair of score lines provided on either side ofthe printed circuit board 2. The break-out portion 6 can thus be broken away from the main portion 4 about the line of weakness 14.
The break-out portion 6 is electrically connected to the main portion 4 byflexible wiring in the form of a flexible flat ribbon strip 16. As can be seen from the drawings,theflat ribbon strip 16 is provided on the side ofthe printed circuit board that has the components 8, 10. The components 8, 10 and the flexible wiring 16 are provided with flow soldered electrical connections on the side of the printed circuit board 2 remote from the components 8,10.
Figure 2 shows terminals 18 of the components 8, terminals 20 of the component 10, and wire ends 22 of the flat ribbon strip 16. The terminals 18,20 and the wire ends 22 all extend in the same direction as shown. The side of the printed circuit board 2 remote from the components 8,loins the track side 24 of the printed circuit board 2. The track side 24 is shown in Figure 2 as passing over a molten solder wave 26 emanating from slot 28. It will be apparentfrom Figure 2 that in one sing le flow soldering operation, all the necessary electrical connections between the terminals 18,20 and the wire ends 22 can be made. Figure3 shows the terminals 18,20 and the wire ends 22 after theflowsoldering operation.
In use of the printed circuit board 2, the break-out portion 6 is breakable awayfrom the main portion 4, for example as illustrated in Figure 3. The break-out portion 6 is then mountable separatelyfrom the main portion 4, for example in any desired plane relative to the main portion 4 on a face plate (not shown) of a radio (not shown). The break-out portion 6 is however still in electrical contact with the main portion through the flat ribbon strip 16. Thus, afterthe mounting ofthe break-out portion 6 in the desired position, it is not then necessary as has previously been the case for the component 10 to be separatelywired as necessary to the components 8. Thus much assembly wiring time is saved and an often difficult and frustrating separate wiring step is avoided.
It isto be appreciated that the embodiment of the invention described above has been given byway of example only and that modifications may be affected.
Thus, for example, the flat ribbon strip 16 could be replaced by individual wires. Also, the break-out portion 6 could be provided with a plurality of electronic components instead ofjustthe one component 10 so that the break-out portion 6 would then be like a separate printed circuit board. With four break-out portions 6 positioned one on each side of the main portion 4, it will be apparent that if the break-out portions 6 are broken upwardlythrough 90% then a box type construction can quickly and easily be formed. The printed circuit board 2 is a rigid printed circuit board but it could be a flexible printed circuit board or a semi-rigid composite layer printed circuit board.

Claims (10)

1. A printed circuit board having a main portion and a break-out portion which is adapted to be broken away from the main portion, the main portion and the break-out portion each having at least one compo nent, the break-out portion being electrically connected to the main portion by flexible wiring which is provided on the side ofthe printed circuit board that has the components, and the components and the flexible wiring being provided with flow soldered electrical connections on the side of the printed circuit board remote from the components, whereby the break-out portion is breakable away from the main portion to enable the break-out portion to be mounted separately from the main portion whilst still being in electrical contact with the main portion and whereby all the electrical connections to be made on the side of the printed circuit board remote from the components are formable in one flow soldering operation.
2. A printed circuit board according to claim 1 in which the break-out portion is located at one edge of the printed circuit board before it is broken away.
3. A printed circuit board according to claim 2 in which the break-out portion is defined by a pair of parallel spaced apart slots and a weakened line which extends between the slots.
4. A printed circuit board according to claim 3 in which the weakened line in provided by a score line on either side of the printed circuit board.
5. A printed circuit board according to any one of the preceding claims in which the flexible wiring is flexible flat ribbon wiring.
6. A printed circuit board according to any one of the preceding claims and which is a rigid printed circuit board.
7. A printed circuit board according to any one of claims 1 to 5 and which is a semi-rigid printed circuit board.
8. A printed circuit board according to any one of claims 1 to 5 and which is a flexible printed circuit board.
9. A printed circuit board according to any one of the preceding claims in which the break-out portion is provided with a single component.
10. A printed circuit board substantially as herein described with reference to the accompanying drawings.
GB08514672A 1984-06-15 1985-06-11 A printed circuit board Expired GB2160366B (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB848415272A GB8415272D0 (en) 1984-06-15 1984-06-15 Printed circuit board
GB848429780A GB8429780D0 (en) 1984-11-26 1984-11-26 Electrical switching apparatus

Publications (3)

Publication Number Publication Date
GB8514672D0 GB8514672D0 (en) 1985-07-10
GB2160366A true GB2160366A (en) 1985-12-18
GB2160366B GB2160366B (en) 1987-09-09

Family

ID=26287868

Family Applications (2)

Application Number Title Priority Date Filing Date
GB08514672A Expired GB2160366B (en) 1984-06-15 1985-06-11 A printed circuit board
GB08514673A Withdrawn GB2161657A (en) 1984-06-15 1985-06-11 Mounting electrical switch on printed circuit board

Family Applications After (1)

Application Number Title Priority Date Filing Date
GB08514673A Withdrawn GB2161657A (en) 1984-06-15 1985-06-11 Mounting electrical switch on printed circuit board

Country Status (1)

Country Link
GB (2) GB2160366B (en)

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4769741A (en) * 1985-12-20 1988-09-06 General Electric Company Electrical module and method for the manufacture thereof
FR2626999A1 (en) * 1988-02-05 1989-08-11 Jaeger Device comprising a transmissive, passive display element especially for the electronic clock of a motor vehicle
EP0489384A2 (en) * 1990-12-06 1992-06-10 Moulinex Method for orienting at least one electronic component placed on a printed circuit board
US5337216A (en) * 1992-05-18 1994-08-09 Square D Company Multichip semiconductor small outline integrated circuit package structure
GB2279907A (en) * 1993-07-02 1995-01-18 Gec Avery Ltd Flexible mountings for electronic components in smart cards.
FR2723500A1 (en) * 1994-08-03 1996-02-09 Sagem ELECTRONIC CIRCUIT BOARD PRINTED.
US5835781A (en) * 1992-09-18 1998-11-10 Allen Bradley Company, Llc Break-away key for electronic circuitry
US6328598B1 (en) 2000-04-21 2001-12-11 International Business Machines Corporation Printed circuit board supporting different types of chassis connector panels
GB2386761A (en) * 2002-03-23 2003-09-24 3Com Corp Protecting edge terminals on circuit board
US7382619B2 (en) * 2004-05-14 2008-06-03 Orion Electric Co., Ltd. Printed circuit board with improved heat dissipation efficiency, electronic apparatus having printed circuit board with improved heat dissipation efficiency, CRT display device having printed circuit board with improved heat dissipation efficiency, and recording/reproducing device or video display device incorporating recording/reproducing device having printed circuit board with improved heat dissipation efficiency

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB809256A (en) * 1955-12-22 1959-02-18 Chicago Telephone Supply Corp Combined variable resistor and switch for use with printed circuits
GB820318A (en) * 1955-12-22 1959-09-16 Chicago Telephone Supply Corp Radio and television receiver component adapted especially for use with printed wiring
GB826877A (en) * 1957-07-10 1960-01-27 Chicago Telephone Supply Corp Electric switch with terminal assembly adapted for connection to printed circuits
GB827250A (en) * 1957-07-19 1960-02-03 Chicago Telephone Supply Corp Electric switch with terminal assembly adapted for connection to printed circuits
GB827033A (en) * 1957-07-24 1960-02-03 Chicago Telephone Supply Corp Electric switch with terminal assembly adapted for connection to printed circuits
GB826797A (en) * 1957-07-22 1960-01-20 Chicago Telephone Supply Corp Electric switch with terminal assembly adapted for connection to printed circuits
GB1538663A (en) * 1977-06-02 1979-01-24 Diamond Power Speciality Electrical connector arrangement
CA1220806A (en) * 1981-12-02 1987-04-21 David J. Gingerich Sealed electrical contact assembly and electrical switch made therefrom

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4769741A (en) * 1985-12-20 1988-09-06 General Electric Company Electrical module and method for the manufacture thereof
FR2626999A1 (en) * 1988-02-05 1989-08-11 Jaeger Device comprising a transmissive, passive display element especially for the electronic clock of a motor vehicle
EP0489384A2 (en) * 1990-12-06 1992-06-10 Moulinex Method for orienting at least one electronic component placed on a printed circuit board
FR2670352A1 (en) * 1990-12-06 1992-06-12 Moulinex Sa METHOD OF ORIENTATION OF AT LEAST ONE ELECTRONIC COMPONENT PLACED ON A PRINTED CIRCUIT BOARD.
EP0489384A3 (en) * 1990-12-06 1993-02-24 Moulinex Method for orienting at least one electronic component placed on a printed circuit board
US5337216A (en) * 1992-05-18 1994-08-09 Square D Company Multichip semiconductor small outline integrated circuit package structure
US5835781A (en) * 1992-09-18 1998-11-10 Allen Bradley Company, Llc Break-away key for electronic circuitry
GB2279907B (en) * 1993-07-02 1996-11-06 Gec Avery Ltd An integrated circuit card
GB2279907A (en) * 1993-07-02 1995-01-18 Gec Avery Ltd Flexible mountings for electronic components in smart cards.
FR2723500A1 (en) * 1994-08-03 1996-02-09 Sagem ELECTRONIC CIRCUIT BOARD PRINTED.
US6328598B1 (en) 2000-04-21 2001-12-11 International Business Machines Corporation Printed circuit board supporting different types of chassis connector panels
GB2386761A (en) * 2002-03-23 2003-09-24 3Com Corp Protecting edge terminals on circuit board
GB2386761B (en) * 2002-03-23 2004-06-23 3Com Corp Circuit card having recessed terminal array
US7382619B2 (en) * 2004-05-14 2008-06-03 Orion Electric Co., Ltd. Printed circuit board with improved heat dissipation efficiency, electronic apparatus having printed circuit board with improved heat dissipation efficiency, CRT display device having printed circuit board with improved heat dissipation efficiency, and recording/reproducing device or video display device incorporating recording/reproducing device having printed circuit board with improved heat dissipation efficiency

Also Published As

Publication number Publication date
GB2160366B (en) 1987-09-09
GB2161657A (en) 1986-01-15
GB8514673D0 (en) 1985-07-10
GB8514672D0 (en) 1985-07-10

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Legal Events

Date Code Title Description
PCNP Patent ceased through non-payment of renewal fee