GB2187047A - Electrical connection terminal - Google Patents

Electrical connection terminal Download PDF

Info

Publication number
GB2187047A
GB2187047A GB08603899A GB8603899A GB2187047A GB 2187047 A GB2187047 A GB 2187047A GB 08603899 A GB08603899 A GB 08603899A GB 8603899 A GB8603899 A GB 8603899A GB 2187047 A GB2187047 A GB 2187047A
Authority
GB
United Kingdom
Prior art keywords
pin
solder
electrical connection
channels
elongate
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.)
Withdrawn
Application number
GB08603899A
Other versions
GB8603899D0 (en
Inventor
John William Souter
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.)
Plessey Co Ltd
Original Assignee
Plessey Co 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
Application filed by Plessey Co Ltd filed Critical Plessey Co Ltd
Priority to GB08603899A priority Critical patent/GB2187047A/en
Publication of GB8603899D0 publication Critical patent/GB8603899D0/en
Priority to PCT/GB1987/000115 priority patent/WO1987005156A1/en
Priority to EP87901535A priority patent/EP0258366A1/en
Publication of GB2187047A publication Critical patent/GB2187047A/en
Withdrawn legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R12/00—Structural associations of a plurality of mutually-insulated electrical connecting elements, specially adapted for printed circuits, e.g. printed circuit boards [PCB], flat or ribbon cables, or like generally planar structures, e.g. terminal strips, terminal blocks; Coupling devices specially adapted for printed circuits, flat or ribbon cables, or like generally planar structures; Terminals specially adapted for contact with, or insertion into, printed circuits, flat or ribbon cables, or like generally planar structures
    • H01R12/50—Fixed connections
    • H01R12/51—Fixed connections for rigid printed circuits or like structures
    • H01R12/55—Fixed connections for rigid printed circuits or like structures characterised by the terminals
    • H01R12/58—Fixed connections for rigid printed circuits or like structures characterised by the terminals terminals for insertion into holes
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R4/00—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation
    • H01R4/02—Soldered or welded connections
    • 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
    • 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
    • H05K2201/10227—Other objects, e.g. metallic pieces
    • H05K2201/10295—Metallic connector elements partly mounted in a hole of the PCB
    • H05K2201/10303—Pin-in-hole mounted pins
    • 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
    • H05K2201/10613—Details of electrical connections of non-printed components, e.g. special leads
    • H05K2201/10742—Details of leads
    • H05K2201/1075—Shape details
    • H05K2201/1081—Special cross-section of a lead; Different cross-sections of different leads; Matching cross-section, e.g. matched to a land
    • 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
    • H05K2201/10613—Details of electrical connections of non-printed components, e.g. special leads
    • H05K2201/10954—Other details of electrical connections
    • H05K2201/10984—Component carrying a connection agent, e.g. solder, adhesive

Abstract

An elongate electrical connection pin having a surface which at one end is longitudinally scalloped so as to provide at least two elongate parallel channels which extend longitudinally and which are arranged to contain solder, whereby the channels serve as a solder reservoir which consequent upon the application of heat sufficient to melt the solder will facilitate the making of a soldered electrical connection to a suitable body brought into contact with the pin. The pin allows a joint to be made without the need to add further solder and this reduces the risk of solder contamination of adjacent circuit parts when making the joint.

Description

SPECIFICATION Electrical connection terminal This invention relates to an electrical connection terminal. It relates particularly to a terminal having a shape which is modified from that normally available so as facilitate the making of a good soldered electrical joint to the terminal.
Afavoured system of forming a good electrical joint between a terminal and, say, a plated through-hole of a printed circuit board is to make a fusion joint with solder. If no additional electrical connectionsareto be madetotheboard, itmightbe possible to use a wave soldering process and thus form the joints automatically. Frequently, however, the soldered joints must be made by hand and this can lead to the need to feed additional solder material to the joint area whilstsimultaneously avoiding solder contamination oftheterminal end.
The need to avoid contamination of an end part of theterminal is particularly importantifthe end part is required laterto be wire-wrapped orto be used as a contactfor enabling additional connector connections to be made.
The present invention was devised to provide an electrical connection terminal to which the making of a soldered electrical joint could be considerably facilitated.
According to the invention, there is provided an elongate electrical connection pin having a surface which atone end islongitudinallyscallopedsoasto provide at least two elongate parallel channels which extend longitudinally and which are arranged to contain solder,wherebythe channels serve as a solder reservoir which consequent upon the application of heat sufficient to melt the solderwill facilitatethe making of a soldered electrical connection to a suitable body brought into contact with the pin.
Preferably, the length of the scalloped portion of the pin surface is greaterthanthe required length of the solderjointwhich is eventuallyto be made. The number of elongate parallel channels provided may liewithinthe rangeoftwoandfourchannels.
By way of example, some particular embodiments ofthe invention will now be described with reference to the accompanying drawing, in which: Figure 1 shows part of an electrical connector having a electrical terminal in the form of a pin, Figure2 is a cross-sectional view on an enlarged scale showing a pin including four elongate parallel channels that have been formed therein, Figure3 is a different pin showing three parallel channels formed therein, Figure4shows partially on an enlarged scale the channelled pin located in a plated through-hoie of a printed circuit board, and, Figure 5 is a partial cross-sectional view of the pin located in a hole of a printed circuit board and with the solderfrom the pin forming an electrical joint with the board.
As shown in Figure 1, a particular construction of electrical connector 1 is provided with an electrical connection terminal taking the form of a connection pin 2. The conventional connection pin has a generally square shape as seen in cross-section.
The connection pin of the invention is provided with at least two elongate parallel channels. As seen in the cross-sectional view of Figure 2, the pin 2 has been modified locallyfrom the square cross-sectional shape to a shape having four elongate parallel channels 3. Each channel has been filled with a quantity of solder 4. The solderwas applied to the channel surface in a liquid form and upon cooling the quantity of solder retained in the channel took up the shape shown as a result of surface tension forces.
Figure 3 shows a different embodiment where the pin 2 has been modified to include onlythree ofthe elongate parallel channels 3.
In the manufacture of printed circuit boards, the manufacturing process provides the usual copper circuit pattern on the electrically insulating board substrate. At junction points of the pattern the board is provided with a through-holethe internal wall of which is lined with an electroplated extension of the copper circuit material with a tin ortin/lead coating on the inner surface of the hole wall. The provision of the tin coating is to facilitate the making of a soldered joint to the circuit pattern when an electronic component or an electrical terminal has been suitably positioned in the hole.
Figure 4 shows the connection pin 2 of the invention positioned in a through-hole 6 of a printed circuit board 7. The connection pin 2 carries a quantity of solder in the elongate channels 3 and the length ofthe channels along the body of the pin is such that this length will be greaterthan the board thickness.
When the connection pin 2 has been positioned in this way in a hole 6 of a printed circuit board 7,the application of heat to the entire assembly at a temperature sufficient to melt the solder will cause the solder within the channels 3 to melt and gravity and surface tension forces will induce the solderto flow down the channels and into the hole area.The solder is thus caused to fill the space between the outer surface of the pin 2 and the copper walls ofthe hole. Upon cooling, a good electrical joint will have been formed between the pin 2 and the printed circuit pattern on the board.
Figure5 shows an enlarged cross-sectional view of the pin 2 located in the hole 6. The body of solder 4 forming the electrical joint within the hole is seen to have occupied the whole ofthe area of the hole 6to ensure that a reliable electrical connection has been made. The melted solder material has not tended to run outside the boundary of the hole 6 so thatthere will be little risk of excess solder interfering with the operation of other parts of the circuit.
The foregoing description of embodiments of the invention has been given byway of example only and a numberof modifications maybe madewithout departing from the scope of the invention as defined in the appended claims. For instance, it is not essential that the electrical connection pin should be initially of a square cross-sectional shape before the elongate parallel channels are formed therein. An alternative initial shape such as circularwould also be possible. Differentshapesfortheelongate channels as alternatives to the scalloped shape specifically described are also possibilities. The main requirementforthe channels is that they will provide a suitable reservoirforthe solder material to be retained on the pin.

Claims (5)

1. An elongate electrical connection pin having a surface which at one end is longitudinally scalloped so as to provide at leasttwo elongate parallel channels which extend longitudinally and which are arranged to contain solder, wherebythe channels serve as a solder reservoirwhich consequentupon the application of heat sufficient to melt the solder will facilitate the making of a soldered electrical connection to a suitable body brought into contact with the pin.
2. A pin as claimed in Claim 1, in which the length of the scalloped portion of the pin surface is greater than the required length of the soldered jointwhich is eventually to be made.
3. Apin as claimed in Claim 1 or2, in which the number of elongate channels provided lies within the range of two and four channels.
4. An electrical connection pin substantially as hereinbefore described, with reference to any one of Figures 2to 5 ofthe accompanying drawing.
5. An electrical connector when including a connection pin as claimed in any one of Claims 1 to 4.
GB08603899A 1986-02-17 1986-02-17 Electrical connection terminal Withdrawn GB2187047A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
GB08603899A GB2187047A (en) 1986-02-17 1986-02-17 Electrical connection terminal
PCT/GB1987/000115 WO1987005156A1 (en) 1986-02-17 1987-02-17 Electrical connection terminal
EP87901535A EP0258366A1 (en) 1986-02-17 1987-02-17 Electrical connection terminal

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB08603899A GB2187047A (en) 1986-02-17 1986-02-17 Electrical connection terminal

Publications (2)

Publication Number Publication Date
GB8603899D0 GB8603899D0 (en) 1986-03-26
GB2187047A true GB2187047A (en) 1987-08-26

Family

ID=10593199

Family Applications (1)

Application Number Title Priority Date Filing Date
GB08603899A Withdrawn GB2187047A (en) 1986-02-17 1986-02-17 Electrical connection terminal

Country Status (3)

Country Link
EP (1) EP0258366A1 (en)
GB (1) GB2187047A (en)
WO (1) WO1987005156A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0932221A2 (en) * 1998-01-23 1999-07-28 Molex Incorporated Terminal pins mounted in flexible substrates

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1193112A (en) * 1966-08-29 1970-05-28 Gen Electric Electrical Connections.
EP0088582A1 (en) * 1982-03-04 1983-09-14 E.I. Du Pont De Nemours And Company Press-fit electrical terminals

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3083350A (en) * 1960-05-05 1963-03-26 John R Mitthauer Means for and method of connecting stranded electric wires and/or stranded wire cables
DE3125522A1 (en) * 1981-06-29 1983-01-13 Harting Elektronik Gmbh, 4992 Espelkamp Contact element for pressing into printed-circuit boards

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1193112A (en) * 1966-08-29 1970-05-28 Gen Electric Electrical Connections.
EP0088582A1 (en) * 1982-03-04 1983-09-14 E.I. Du Pont De Nemours And Company Press-fit electrical terminals

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0932221A2 (en) * 1998-01-23 1999-07-28 Molex Incorporated Terminal pins mounted in flexible substrates
EP0932221A3 (en) * 1998-01-23 2001-10-31 Molex Incorporated Terminal pins mounted in flexible substrates

Also Published As

Publication number Publication date
WO1987005156A1 (en) 1987-08-27
EP0258366A1 (en) 1988-03-09
GB8603899D0 (en) 1986-03-26

Similar Documents

Publication Publication Date Title
KR850000216Y1 (en) Printed circuit board
US6623283B1 (en) Connector with base having channels to facilitate surface mount solder attachment
US3665367A (en) Side hole terminal
US6780028B1 (en) Solder reserve transfer device and process
US4991059A (en) Electric component
EP0971569A1 (en) Enhanced mounting pads for printed circuit boards
ES8500547A1 (en) Printed circuit and process for making the circuit.
CN100539812C (en) Printed wiring board and electronic equipment
US6081996A (en) Through hole circuit board interconnect
US3541225A (en) Electrical conductor with improved solder characteristics
EP0280508B1 (en) Through-board electrical component header having integral solder mask
US3500538A (en) Method for producing a wire having improved soldering characteristics
EP0159771B1 (en) Chip resistors and forming method
GB2187047A (en) Electrical connection terminal
US6353191B1 (en) Column grid array connector
JP2926902B2 (en) Printed wiring board
JPH1041605A (en) Electronic component mounting structure
CA1052475A (en) Double faced printed circuit board interconnection
JPS582470B2 (en) printed wiring board
JPH0446381Y2 (en)
JPH0217954B2 (en)
JPS59172290A (en) Method of connecting both-side printed circuit board
JPH0214207Y2 (en)
JPS6011655Y2 (en) printed board
EP0594409A1 (en) A connection device for a printed wiring board

Legal Events

Date Code Title Description
732 Registration of transactions, instruments or events in the register (sect. 32/1977)
WAP Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1)