WO2009156801A1 - Press-fit connection system - Google Patents

Press-fit connection system Download PDF

Info

Publication number
WO2009156801A1
WO2009156801A1 PCT/IB2008/053508 IB2008053508W WO2009156801A1 WO 2009156801 A1 WO2009156801 A1 WO 2009156801A1 IB 2008053508 W IB2008053508 W IB 2008053508W WO 2009156801 A1 WO2009156801 A1 WO 2009156801A1
Authority
WO
WIPO (PCT)
Prior art keywords
press
sections
fit
connection
circuit board
Prior art date
Application number
PCT/IB2008/053508
Other languages
French (fr)
Inventor
Stefaan Hendrik Jozef Sercu
Danny Morlion
Original Assignee
Fci
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 Fci filed Critical Fci
Priority to PCT/IB2008/053508 priority Critical patent/WO2009156801A1/en
Publication of WO2009156801A1 publication Critical patent/WO2009156801A1/en

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
    • H01R12/585—Terminals having a press fit or a compliant portion and a shank passing through a hole in the printed circuit board
    • 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
    • H05K1/11—Printed elements for providing electric connections to or between printed circuits
    • H05K1/115—Via connections; Lands around holes or via 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
    • H05K3/306—Lead-in-hole components, e.g. affixing or retention before soldering, spacing means
    • H05K3/308—Adaptations of leads
    • 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
    • H05K3/40—Forming printed elements for providing electric connections to or between printed circuits
    • H05K3/403—Edge contacts; Windows or holes in the substrate having plural connections on the walls thereof
    • 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
    • H05K2201/09—Shape and layout
    • H05K2201/09209—Shape and layout details of conductors
    • H05K2201/095—Conductive through-holes or vias
    • H05K2201/09645—Patterning on via walls; Plural lands around one hole
    • 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
    • H05K2201/10431—Details of mounted components
    • H05K2201/1059—Connections made by press-fit insertion
    • 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
    • H05K2201/10886—Other details
    • H05K2201/10893—Grouped leads, i.e. element comprising multiple leads distributed around but not through a common insulator
    • 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
    • H05K3/0047—Drilling of holes

Definitions

  • the present invention concerns a system for a press fit connection to a printed circuit board.
  • a press-fit connector generally comprises an electrically isolating body carrying a series of contact pins whose terminal branches proximal to the printed circuit have a profile enabling them to be force-fitted into via-holes in the printed circuit.
  • These via-holes are plated with electrically conductive linings, e.g. of a copper or silver based lining material.
  • the distal terminal branches of the connector can for example be male or female connecting members for connection with further components.
  • EP 1 523 068 A discloses an example of such a press-fit system.
  • the terminals are provided with a resilient section, such as a needle eye section, forming a tight, interference fit with the lining within the plated via-hole.
  • the object of the invention is to provide a press-fit connection allowing higher press fit contact density.
  • the circuit board can comprise via-holes for a press-fit connection with a contact pin wherein the via-holes are plated with electrically conductive lining sections on at least two mutually isolated contact locations.
  • the via-holes can for example have two opposite lining sections extending parallel to the axis of the via-hole over the full thickness of the via holes.
  • the connector can for example have contact pins comprising two or more electro-conductive terminals and a solid insulating material separating the connector pins.
  • the terminals can for example be pins or they can be strips applied on a central pin of isolating solid material, such as a suitable plastic.
  • At least one of the two connector pins can comprise a resilient section, such as resiliently deformed section or a hollow bulge or needle eye section.
  • each connector pin forms a differential pair.
  • the invention also relates to a method of establishing an electrical press-fit engagement of a connector contact with an electro-conductive lining of a via-hole in a circuit board, according to claim 7.
  • Figure 1 shows schematically a press-fit connection system according to the present invention
  • Figure 2A shows a first step of manufacturing a via-hole for a press fit system according to the invention
  • Figure 2B shows the second step of manufacturing the via- hole following the step of Fig. 2A;
  • Figure 2C shows a bottom view of the via-hole of Fig. 2B with a dual connector pin pressed into it.
  • Figure 1 shows a side view of a dual contact pin 1 and a top view of a via-hole 2 in a printed circuit board 3.
  • the via- hole 2 is dimensioned to form a press fit connection with the dual contact pin 1.
  • the dual contact pin 1 comprises two connection sections 11 forming a differential pair separated by a central section 12 of an isolating, and possibly solid, material. Both terminals 11 are provided with a resilient loop section or needle eye section 13. The two resilient sections 11 are symmetrically arranged on opposite sides of the isolating central section 12.
  • Via-hole 2 is formed in the circuit bard 3 and comprises two opposite sections 21 plated with an electrically conductive lining and separated by an isolating barrier 22.
  • the resilient or compliant sections 11 which are oversized in respect to the via-hole diameter or another relevant internal dimension, engage with a tight fit or interference-fit in a clamping manner the plated lining 21.
  • Figures 2A and 2B show two steps in manufacturing an alternative via-hole 4, shown in Figure 2C.
  • First two overlapping (or closed holes 41 are drilled in the printed circuit board 3 and plated or coated with an electrically conductive lining 42 extending into the via-hole.
  • a central bore 43 is drilled, dividing the plated linings 41 in two opposite, separated sections 44.
  • the via-hole 4 can now be used for a press-fit connection with a dual connector pin 1.
  • Figure 2C the same dual connector pin 1 is used as in Figure 1, now shown in bottom view.
  • via-hole not only encompasses a plated through-hole (PTH) but also a plated blind hole.

Landscapes

  • Engineering & Computer Science (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Manufacturing & Machinery (AREA)
  • Coupling Device And Connection With Printed Circuit (AREA)
  • Multi-Conductor Connections (AREA)

Abstract

The invention pertains to a press-fit connection system for connecting a press-fit connector to a circuit board. The press-fit connector is provided with contact pins (1) dimensioned to form a press fit connection with corresponding via-holes (2) in a circuit board (3). The contact pins (1) comprise mutually isolated connection sections (11) and the via-holes are partly plated with at least two mutually isolated electrically conductive lining sections (21). The via-holes are designed to receive a connection pin with the connection sections (11) engaging the lining sections (21) in a one-to-one relationship.

Description

PRESS-FIT CONNECTION SYSTEM
Field of the Invention
The present invention concerns a system for a press fit connection to a printed circuit board.
Description of the Prior Art
A press-fit connector generally comprises an electrically isolating body carrying a series of contact pins whose terminal branches proximal to the printed circuit have a profile enabling them to be force-fitted into via-holes in the printed circuit. These via-holes are plated with electrically conductive linings, e.g. of a copper or silver based lining material. The distal terminal branches of the connector can for example be male or female connecting members for connection with further components.
EP 1 523 068 A discloses an example of such a press-fit system. The terminals are provided with a resilient section, such as a needle eye section, forming a tight, interference fit with the lining within the plated via-hole.
In press-fit connections it is desirable to have a high density of connector pins. However, the possible connector pin density is limited by the space required for routing between the via-holes. Further, in manufacturing via-holes a certain minimum distance is required. The via-holes must be made by drilling, therefore requiring a minimum diameter. Mechanical strength of the circuit board further requires that these holes should be at a certain distance from each other.
The object of the invention is to provide a press-fit connection allowing higher press fit contact density.
Summary Of The Invention The object of the invention is achieved with a press-fit connection system according to claim 1.
This way, only one via-hole is required for receiving more than one terminal, e.g. two connection sections optionally forming a differential pair. While sufficient distance between via-holes can be maintained to comply with mechanical strength requirements, the density of the terminals can be doubled.
The circuit board can comprise via-holes for a press-fit connection with a contact pin wherein the via-holes are plated with electrically conductive lining sections on at least two mutually isolated contact locations. The via-holes can for example have two opposite lining sections extending parallel to the axis of the via-hole over the full thickness of the via holes.
The connector can for example have contact pins comprising two or more electro-conductive terminals and a solid insulating material separating the connector pins.
The terminals can for example be pins or they can be strips applied on a central pin of isolating solid material, such as a suitable plastic.
To obtain a tight engagement between the terminals and the linings, at least one of the two connector pins can comprise a resilient section, such as resiliently deformed section or a hollow bulge or needle eye section.
Optionally, the terminals of each connector pin form a differential pair.
The invention also relates to a method of establishing an electrical press-fit engagement of a connector contact with an electro-conductive lining of a via-hole in a circuit board, according to claim 7.
Brief Description of the Drawing The invention is further explained by way of example only and by reference to the accompanying drawing, wherein:
Figure 1 shows schematically a press-fit connection system according to the present invention;
Figure 2A shows a first step of manufacturing a via-hole for a press fit system according to the invention;
Figure 2B shows the second step of manufacturing the via- hole following the step of Fig. 2A; Figure 2C shows a bottom view of the via-hole of Fig. 2B with a dual connector pin pressed into it.
Figure 1 shows a side view of a dual contact pin 1 and a top view of a via-hole 2 in a printed circuit board 3. The via- hole 2 is dimensioned to form a press fit connection with the dual contact pin 1. The dual contact pin 1 comprises two connection sections 11 forming a differential pair separated by a central section 12 of an isolating, and possibly solid, material. Both terminals 11 are provided with a resilient loop section or needle eye section 13. The two resilient sections 11 are symmetrically arranged on opposite sides of the isolating central section 12.
Via-hole 2 is formed in the circuit bard 3 and comprises two opposite sections 21 plated with an electrically conductive lining and separated by an isolating barrier 22. When the dual contact pin 1 is inserted m the via-hole 2, the resilient or compliant sections 11, which are oversized in respect to the via-hole diameter or another relevant internal dimension, engage with a tight fit or interference-fit in a clamping manner the plated lining 21.
Figures 2A and 2B show two steps in manufacturing an alternative via-hole 4, shown in Figure 2C. First two overlapping (or closed holes 41 are drilled in the printed circuit board 3 and plated or coated with an electrically conductive lining 42 extending into the via-hole. In a next step, a central bore 43 is drilled, dividing the plated linings 41 in two opposite, separated sections 44. The via-hole 4 can now be used for a press-fit connection with a dual connector pin 1. In Figure 2C the same dual connector pin 1 is used as in Figure 1, now shown in bottom view.
It should be clear to the person skilled in the art that the "via-hole" term used in the present document not only encompasses a plated through-hole (PTH) but also a plated blind hole.

Claims

1. Press-fit connection system for connecting a press-fit connector to a circuit board, wherein the press-fit connector is provided with contact pins (1) dimensioned to form a press fit connection with corresponding via-holes (2) in a circuit board (3), wherein at least a part of the contact pins (1) comprises two or more mutually isolated connection sections (11) and wherein the via-holes are partly plated with at least two mutually isolated electrically conductive lining sections (21) and wherein the via- holes are designed to receive a contact pin with the connection sections (11) engaging the lining sections (21) in a one-to-one relationship.
2. Circuit board comprising via-holes for a press- fit connection with a contact pin wherein the via-holes (2) are plated with an electrically conductive lining sections (21) on at least two mutually isolated contact locations (44) .
3. Circuit board according to claim 2 wherein the plated lining sections (21) are two opposite sections.
4. Connector for a press-fit connection provided with contact pins, said contact pins (1) comprising two or more electrically conductive connection sections
(11) and an insulating material (12) separating the connection sections.
5. Connector according to claim 4 wherein at least one of the two connector pins (11) comprises a resilient section (13) for interference-fit engagement with a corresponding plated lining section (21) of a via-hole of a printed circuit board.
6. Connector according to claims 4 or 5, wherein the connection sections (11) of each contact pin form a differential pair.
7. Method of establishing an electrical press-fit engagement of a connector contact with an electrically conductive lining (21) of a via-hole (2) in a circuit board, comprising the steps of: providing a pin (1) comprising at least two separate connection sections (11); providing a via-hole (2) having at least two separate electrically conductive plated sections
(21); inserting the pin in the via-hole to bring the connection sections into engagement with the plated sections in a one-to-one relationship.
8. Press-fit connector for press fit connection to a circuit board, wherein the press-fit connector is provided with contact pins (1) dimensioned to form a press fit connection with corresponding via-holes (2) in a circuit board (3), wherein at least a part of the contact pins (1) comprises two or more mutually isolated connection sections (11) to be inserted in a via-hole .
PCT/IB2008/053508 2008-06-25 2008-06-25 Press-fit connection system WO2009156801A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/IB2008/053508 WO2009156801A1 (en) 2008-06-25 2008-06-25 Press-fit connection system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/IB2008/053508 WO2009156801A1 (en) 2008-06-25 2008-06-25 Press-fit connection system

Publications (1)

Publication Number Publication Date
WO2009156801A1 true WO2009156801A1 (en) 2009-12-30

Family

ID=40445475

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/IB2008/053508 WO2009156801A1 (en) 2008-06-25 2008-06-25 Press-fit connection system

Country Status (1)

Country Link
WO (1) WO2009156801A1 (en)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4838800A (en) * 1988-05-23 1989-06-13 Gte Products Corporation High density interconnect system
US6891272B1 (en) * 2002-07-31 2005-05-10 Silicon Pipe, Inc. Multi-path via interconnection structures and methods for manufacturing the same

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4838800A (en) * 1988-05-23 1989-06-13 Gte Products Corporation High density interconnect system
US6891272B1 (en) * 2002-07-31 2005-05-10 Silicon Pipe, Inc. Multi-path via interconnection structures and methods for manufacturing the same

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