EP4358313A1 - Elektrischer verbinder für eine leiterplatte - Google Patents

Elektrischer verbinder für eine leiterplatte Download PDF

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Publication number
EP4358313A1
EP4358313A1 EP22202773.2A EP22202773A EP4358313A1 EP 4358313 A1 EP4358313 A1 EP 4358313A1 EP 22202773 A EP22202773 A EP 22202773A EP 4358313 A1 EP4358313 A1 EP 4358313A1
Authority
EP
European Patent Office
Prior art keywords
electrical connector
printed circuit
circuit board
connector
housing
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.)
Pending
Application number
EP22202773.2A
Other languages
English (en)
French (fr)
Inventor
Gregor Panitz
Dirk Duenkel
Philipp Beese
Johannes Will
Thomas Wild
Stefan Reichel
Holger Starke
Peter Devos
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.)
TE Connectivity Belgium BV
TE Connectivity Germany GmbH
Original Assignee
TE Connectivity Belgium BV
TE Connectivity Germany GmbH
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 TE Connectivity Belgium BV, TE Connectivity Germany GmbH filed Critical TE Connectivity Belgium BV
Priority to EP22202773.2A priority Critical patent/EP4358313A1/de
Publication of EP4358313A1 publication Critical patent/EP4358313A1/de
Pending legal-status Critical Current

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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
    • H01R12/70—Coupling devices
    • H01R12/7005—Guiding, mounting, polarizing or locking means; Extractors
    • H01R12/7011—Locking or fixing a connector to a PCB
    • H01R12/707—Soldering or welding
    • 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
    • H01R12/70—Coupling devices
    • H01R12/7005—Guiding, mounting, polarizing or locking means; Extractors
    • H01R12/7011—Locking or fixing a connector to a PCB
    • H01R12/7052—Locking or fixing a connector to a PCB characterised by the locating members
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R43/00—Apparatus or processes specially adapted for manufacturing, assembling, maintaining, or repairing of line connectors or current collectors or for joining electric conductors
    • H01R43/02—Apparatus or processes specially adapted for manufacturing, assembling, maintaining, or repairing of line connectors or current collectors or for joining electric conductors for soldered or welded connections
    • H01R43/0256—Apparatus or processes specially adapted for manufacturing, assembling, maintaining, or repairing of line connectors or current collectors or for joining electric conductors for soldered or welded connections for soldering or welding connectors to a printed circuit board
    • 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
    • H01R12/57—Fixed connections for rigid printed circuits or like structures characterised by the terminals surface mounting terminals
    • 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

Definitions

  • the present invention relates to an electrical connector for a printed circuit board.
  • the invention further relates to a device comprising a printed circuit board and an electrical connector, and to a method for producing such a device.
  • a typical electronic device may comprise a printed circuit board (PCB) and a plurality of electronic and/or electrical components mounted thereon.
  • the components may be surfacemounted device (SMD) components and may be soldered onto the printed circuit board via solderable metallic contact elements and using a solder paste.
  • SMT surface-mounting technology
  • the printed circuit board is usually additionally equipped with an electrical connector (PCB connector, PCB header) via which signal and power connections may be made.
  • the connector may be configured to be pluggable with a counter connector, and may be also implemented as a SMD component. In this configuration, the connector may comprise solderable contact elements and may be soldered onto the printed circuit board together with other SMD components.
  • a PCB connector arranged on a printed circuit board is subjected to mechanical forces.
  • an additional mechanical fastening may be provided.
  • the connector may comprise metallic and solderable fastening elements (also referred to as metal or solder brackets) which are soldered onto the printed circuit board together with its contact elements. In this way, appropriate holding forces of the connector on the printed circuit board may be provided.
  • the object of the present invention is to provide an improved solution for a connector for a printed circuit board.
  • an electrical connector for a printed circuit board comprises a housing, a plurality of contact elements arranged at the housing for establishing an electrical connection with the printed circuit board by soldering, and at least one fastening element arranged at the housing for establishing a mechanical connection with the printed circuit board by soldering.
  • the fastening element is formed in one piece from a solder.
  • the proposed electrical connector is intended for mounting on a printed circuit board. In this way, respective electrical signal and/or power connections may be established with the printed circuit board using the connector.
  • the electrical connector comprises at least one fastening element for mechanically attaching the connector to the printed circuit board. Via the fastening element, appropriate holding forces may be provided in the mounted state of the connector such that its contact elements may be protected against mechanical forces occurring when an electrical counter connector is plugged on and removed from the connector.
  • the at least one fastening element of the electrical connector is formed in one piece, or in other words integrally or exclusively from a solder material.
  • the fabrication of the connector may be carried out with a lesser complexity and at lower cost.
  • the connector may be realized with a smaller product size.
  • the mounting of the connector on a printed circuit board may be done with a higher reliability.
  • the connector may e.g. comprise two fastening elements which may be arranged at or near opposite lateral sides of the housing of the connector. In this way, the connector may be firmly attached to a printed circuit board via the fastening elements providing multiple or two fastening points.
  • the plurality of fastening elements may be configured to correspond to each other. This also applies to the arrangement of the fastening elements at the connector housing.
  • the fastening element of the electrical connector may be provided for establishing a mechanical connection with a pad of a printed circuit board via soldering.
  • the respective pad may be a separate or isolated pad which is not connected to a conductor or trace of the printed circuit board.
  • the electrical connector may be a SMD component such that the mounting of the connector on the printed circuit board may comprise carrying out a SMT or reflow soldering process using a solder paste.
  • the connector may be mounted on the printed circuit board in a joint manner together with other components or SMD components.
  • the solder from which the at least one fastening element of the electrical connector is integrally formed is a fusible metal alloy which may melt under the influence of heat or by applying an appropriate soldering temperature.
  • the solder of the fastening element is a soft solder.
  • a solder may melt at a relatively low soldering temperature.
  • the electrical connector may be reliably fixed to a printed circuit board in the course of a SMT process.
  • the fastening element may melt and may thus be firmly connected to the printed circuit board or a pad of the same.
  • the housing of the connector may be assembled with the fastening element in a simple and costefficient manner.
  • the soft solder applied for the fastening element may be a tin-based or tin-lead based solder.
  • the fastening element may be also referred to as solder tin fastening element or solder tin bracket.
  • the fastening element is form-fit connected with the housing of the electrical connector.
  • the fastening element may be reliably and firmly connected to the housing, which in a corresponding manner, when the connector is mounted on a printed circuit board, allows the connector to be reliably and firmly attached to the printed circuit board.
  • the form-fit connection of the fastening element at the connector housing may be realized by an appropriate and matched structural design of the fastening element and the housing, with e.g. an undercut, interlocking contours, an encompassing or embracing structure, or similar structures.
  • the housing of the electrical connector may be a plastic housing, and be realized e.g. as an injection molded part.
  • the contact elements may be formed from a metallic material and comprise a metallic coating or plating.
  • the fastening element of the electrical connector is partially accommodated in a cavity of the housing and partially protrudes from the housing. Moreover, the fastening element is secured or anchored to the housing via the cavity of the housing. In this way, the provision of a reliable and stable attachment of the fastening element at the housing, and thus also the fixation of the connector when arranging it on a printed circuit board, may be further promoted.
  • the cavity of the housing which may extend to an outside or outside surface of the housing, may form-fittingly surround a portion or section of the fastening element.
  • the partial protrusion of the fastening element from the housing may be present in the region of a mounting side of the electrical connector via which the connector may be mounted on a printed circuit board. In the mounted state of the connector, the mounting side may face the printed circuit board.
  • the fastening element comprises an anchoring section and a fastening section.
  • the anchoring section of the fastening element which may be provided for anchoring the fastening element to the housing, is arranged in the cavity of the housing.
  • the fastening section of the fastening element which may be provided for making the mechanical connection with the printed circuit board via soldering, protrudes at least partially from the housing.
  • the fastening section may protrude completely or substantially completely from the housing, or may be partially disposed in the cavity of the housing.
  • the anchoring section of the fastening element comprises a greater cross-sectional width than the fastening section of the fastening element. In this way, the fastening element may be reliably and firmly attached to the connector housing.
  • the fastening section of the fastening element may e.g. comprise an elongated or rectangular cross-sectional profile.
  • the anchoring section may e.g. comprise a circular cross-sectional profile.
  • Other examples of cross-sectional profiles for the anchoring section may include a polygonal profile such as a triangular or rectangular profile.
  • the fastening element may comprise an overall T-shaped cross-sectional profile.
  • the fastening element may e.g. comprise a plate-shaped design.
  • the cavity of the housing may comprise an anchoring region and a passage region extending from the anchoring region to an outside of the housing.
  • the anchoring section of the fastening element may be arranged in the anchoring region of the cavity.
  • the fastening section of the fastening element may extend from the anchoring section through the passage region of the cavity and may partially protrude from the housing.
  • the cavity of the housing may be configured in such a way that the anchoring region comprises a greater cross-sectional width than the passage region.
  • the shapes mentioned above in relation to the fastening element may be also present with respect to the cavity and the anchoring region and passage region of the cavity.
  • the housing of the electrical connector comprises at least one stand-off provided to rest on a printed circuit board in the mounted state of the electrical connector. Via the stand-off of the housing, a defined support point or support region of the housing, and thus a predefined and reliable assembly position of the electrical connector on the printed circuit board, may be provided.
  • the stand-off similar to the fastening element, may protrude from the housing in the region of a mounting side of the electrical connector. Moreover, the fastening element may project over the stand-off at the mounting side, thus allowing the fastening element to be reliably connected to the printed circuit board.
  • each of the plurality of contact elements of the electrical connector comprises a terminal contact section in the region of a mounting side of the connector provided for establishing an electrical connection with a pad of a printed circuit board by soldering.
  • the fastening element projects over the terminal contact sections of the plurality of contact elements in the region of the mounting side of the connector.
  • the terminal contact sections of the contact elements may e.g. extend laterally from the connector housing at the mounting side of the connector.
  • the contact elements may be realized in such a way that the terminal contact sections may be present as flexible or spring contact sections.
  • the pads of the printed circuit board to be contacted by the terminal contact sections of the contact elements may be connected to conductors or traces of the printed circuit board. In this way, in a state in which the printed circuit board is assembled with the electrical connector and other components, electrical signal and/or power connections may be realized in relation to these components via the connector and its contact elements.
  • the mounting of the electrical connector on a printed circuit board may comprise applying a solder paste on the printed circuit board in the region of its pads, placing the connector on the printed circuit board and carrying out a reflow soldering process. Due to the projection of the fastening element over the terminal contact sections of the contact elements in the region of the mounting side of the connector, the connector may be placed on the printed circuit board only with the fastening element (or a plurality of fastening elements, if provided). In the soldering process, the fastening element(s) may melt and be soldered and thus reliably connected to a pad or respective pads of the printed circuit board associated with the fastening element(s). Moreover, the electrical connector may sink towards the printed circuit board such that the terminal contact sections of the contact elements may be soldered and thus connected to respective pads of the printed circuit board associated with the contact elements.
  • each of the plurality of contact elements comprises a pin contact section provided for establishing an electrical connection with a through-contact of a printed circuit board by soldering.
  • the pin contact sections may project over the fastening element at the mounting side of the connector.
  • the through-contacts of the printed circuit board may be realized as plated through-holes or through-holes provided with a metallic coating, and may be connected to conductors or traces of the printed circuit board. In this way, as well, in a state in which the printed circuit board is assembled with the electrical connector and other components, electrical signal and/or power connections may be established in relation to these components using the connector and its contact elements.
  • the mounting of the electrical connector on a printed circuit may comprise applying a solder paste on the printed circuit board in the region of its pad(s) and through-contacts, placing the connector on the printed circuit board and carrying out a reflow soldering process.
  • the connector may be placed on the printed circuit board in such a way that not only the fastening element (or a plurality of fastening elements, if provided) is placed on the printed circuit board, but also the pin contact sections of the contact elements are inserted into or pushed through respective through-contacts of the printed circuit board.
  • the fastening element(s) may melt and be soldered and thus reliably connected to a pad or respective pads of the printed circuit board associated with the fastening element(s).
  • the pin contact sections of the contact elements may be soldered and thus connected to respective through-contacts of the printed circuit board.
  • the electrical connector or its housing may sink towards the printed circuit board.
  • the mounting and soldering of the connector may be also referred to as pin-in-paste process.
  • the electrical connector may be mounted on the printed circuit board together with other SMD components (e.g. electronic and/or electrical components) by also placing such components on the printed circuit board provided with the solder paste, and subjecting the printed circuit board populated with the connector and these components to a reflow soldering process.
  • SMD components e.g. electronic and/or electrical components
  • the electrical connector may be configured to be pluggable with an electrical counter connector.
  • the housing of the electrical connector comprises a receiving chamber for receiving such an electrical counter connector, the counter connector comprising counter contact elements.
  • the counter contact elements may be pluggable with the contact elements of the electrical connector in that the counter contact elements and the contact elements comprise matched contact sections such as pin contact sections and socket contact sections.
  • the connector housing of the electrical connector may be configured in such a way that the counter connector may be plugged in a direction horizontal to or perpendicular to the mounting side of the connector. In these configurations, the connector may be also referred to as 90° or 180° connector or header.
  • a device comprising a printed circuit board and an electrical connector.
  • the electrical connector is configured as described above or according to one or a plurality of the above-described embodiments.
  • the electrical connector is mounted on the printed circuit board.
  • the plurality of contact elements of the electrical connector is electrically connected to the printed circuit board via solder joints, and the fastening element of the electrical connector is mechanically connected to the printed circuit board via a solder joint.
  • electrical signal and/or power connections with the printed circuit board may be established via the electrical connector.
  • the connector may be reliably and firmly attached to the printed circuit board via the at least one fastening element of the same made in one piece from a solder. Consequently, adequate holding forces may be provided and the contact elements of the connector may be protected against mechanical forces occurring when an electrical counter connector is plugged on and removed from the connector.
  • the device may comprise at least one further component or SMD component arranged on the printed circuit board.
  • the device may be also referred to as printed circuit board assembly (PCBA).
  • PCBA printed circuit board assembly
  • the fastening element of the electrical connector is mechanically connected to a pad of the printed circuit board.
  • This pad may be a separate or isolated pad which is not connected to a conductor or trace of the printed circuit board.
  • the contact elements of the electrical connector i.e. terminal contact sections or pin contact sections of the same, may be electrically connected to pads or through-contacts of the printed circuit board, wherein such parts may be connected to conductors or traces of the printed circuit board.
  • the fastening element may be form-fit connected with the housing of the electrical connector.
  • the fastening element may be partially accommodated in a cavity of the housing and may partially protrude from the housing.
  • the fastening element may be anchored to the housing via the cavity of the housing.
  • the fastening element may comprise an anchoring section and a fastening section.
  • the anchoring section may be arranged in the cavity of the housing.
  • the fastening section may protrude at least partially from the housing.
  • the anchoring section may comprise a greater cross-sectional width than the fastening section.
  • the connector housing may comprise at least one stand-off.
  • the at least one stand-off may rest on the printed circuit board.
  • the housing may comprise a receiving chamber for receiving an electrical counter connector.
  • a method for producing a device comprises providing a printed circuit board and providing an electrical connector.
  • the electrical connector is configured as described above or according to one or a plurality of the above-described embodiments.
  • the method further comprises mounting the electrical connector on the printed circuit board.
  • the mounting comprises carrying out a soldering process in which the plurality of contact elements of the electrical connector is electrically connected to the printed circuit board, and the fastening element of the electrical connector is mechanically connected to the printed circuit board.
  • the connector may be reliably and stably fixed to the printed circuit board.
  • the contact elements of the connector may be protected against mechanical forces occurring when an electrical counter connector is plugged on and removed from the connector.
  • the electrical connector may be mounted on the printed circuit board together with other SMD components.
  • the soldering process may be a reflow soldering process carried out using a solder paste.
  • the fastening element of the electrical connector may be mechanically connected to a pad of the printed circuit board.
  • the mounting of the connector on the printed circuit board may be carried out as described above. In this context, the following details of a process sequence may further come into play.
  • Pads of the printed circuit board may be provided with a solder paste. This process may be carried out with the aid of a mask or stencil and by using a squeegee.
  • the solder paste may comprise a solder portion in the form of powdered solder suspended in a flux paste.
  • the connector may be placed on the printed circuit board with the mounting side of the connector facing the printed circuit board such that the fastening element and the terminal contact sections of the contact elements are located in the region of respective pads of the printed circuit board.
  • the fastening element (or a plurality of fastening elements, if provided) projecting over the terminal contact sections may come into physical contact with the solder paste or the solder paste and the pad(s) associated with the fastening element(s), whereas the terminal contact sections may be located at a distance from the solder paste and the associated pads.
  • the connector may be held on the printed circuit board due to an adhesive property of the solder paste.
  • a reflow soldering process may be carried out using a reflow oven in which the fastening element(s) and the terminal contact sections of the contact elements are soldered and thereby connected to the respective pads of the printed circuit board. Due to the heat applied in the soldering process, the fastening element(s) may melt to the effect that the connector may sink towards the printed circuit board and the terminal contact sections of the contact elements may come into contact with the solder paste.
  • the solder paste may also melt as a result of the applied heat, wherein a volatile portion (flux) of the solder paste may be evaporated, and electrically conductive solder joints may be formed via a melted liquid solder portion of the solder paste.
  • the terminal contact sections of the contact elements may be soldered and thus mechanically and electrically connected to the respective pads.
  • the melted fastening element(s) may merge with the melted solder portion of the solder paste applied on the pad(s) associated with the fastening element(s), and the fastening element(s) may be soldered and thus mechanically attached to that/these pad(s).
  • the solder joint(s) may be formed via the fastening element(s) together with the solder portion of the solder paste.
  • the mounting of the connector on the printed circuit board may be carried out as described above. In this context, the following details of a process sequence may be also applied.
  • Pads and through-contacts of the printed circuit may be provided with a solder paste. This process may be carried out with the aid of a mask or stencil and by using a squeegee.
  • the solder paste may comprise a solder portion in the form of powdered solder suspended in a flux paste.
  • the solder paste may be applied in such a way that the through-contacts may be at least partially filled with the solder paste.
  • the connector may be placed on the printed circuit board with the mounting side of the connector facing the printed circuit board such that the fastening element (or a plurality of fastening elements, if provided) and the pin contact sections of the contact elements are located in the region of the respective pad(s) and through-contacts of the printed circuit board.
  • the pin contact sections may be inserted into or pushed through respective through-contacts of the printed circuit board, thus coming into physical contact with the solder paste or the solder paste and the trough-contacts.
  • the fastening element(s) may also come into physical contact with the solder paste or the solder paste and the pad(s) associated with the fastening element(s).
  • a reflow soldering process may be carried out using a reflow oven in which the fastening element(s) and the pin contact sections of the contact elements are soldered and thereby connected to a respective pad or pads and respective through-contacts of the printed circuit board. Due to the heat applied in the soldering process, the fastening element(s) may melt to the effect that the connector or connector housing may sink towards the printed circuit board.
  • the solder paste may also melt as a result of the applied heat, wherein a volatile portion (flux) of the solder paste may be evaporated, and electrically conductive solder joints may be formed via a melted liquid solder portion of the solder paste.
  • the pin contact sections of the contact elements may be soldered and thus mechanically and electrically connected to the respective through-contacts of the printed circuit board.
  • the fastening element(s) the melted fastening element(s) may merge with the melted solder portion of the solder paste applied on the pad(s) associated with the fastening element(s), and the fastening element(s) may be soldered and thus mechanically attached to that/these pad(s).
  • the solder joint(s) may be formed via the fastening element(s) together with the solder portion of the solder paste.
  • PCB 200 Possible configurations of an electrical connector 100 for mounting on a printed circuit board 200, hereinafter referred to as PCB 200, and of a method of producing a device 290 including mounting the connector 100 on the PCB 200, are described with reference to the following schematic figures. It is pointed out that the schematic figures may not be true to scale. Therefore, components, elements and structures shown in the figures may be illustrated with exaggerated size or size reduction in order to afford a better understanding. In addition, it is pointed out that features and details described in relation to one configuration may be also applied to another configuration.
  • Figure 1 depicts a schematic lateral illustration of an electrical connector 100 according to an implementation and of a PCB 200.
  • the connector 100 is configured as a SMD component to be mounted on the PCB 200 via soldering such that respective electrical signal and power connections may be established with the PCB 200 (and other components to be arranged on the PCB 200, not shown) using the connector 100.
  • the PCB 200 may be provided with electrical energy, and a signal or data transfer to and from the PCB 200 may be enabled.
  • the connector 100 is further configured to be pluggable with an electrical counter connector 300, as will be described in more detail below with reference to figures 8 and 9 .
  • the electrical connector 100 may be also referred to as PCB connector or PCB header.
  • the electrical connector 100 comprises a plastic housing 110 and a plurality of solderable metallic contact elements 120 arranged at the housing 110.
  • the contact elements 120 are formed from a metallic material and may comprise a metallic coating or plating (not shown).
  • the contact elements 120 are provided for establishing an electrical connection with the PCB 200, i.e. with metallic pads 210 of the PCB 200, via soldering, in order to realize the aforementioned electrical signal and power connections.
  • the contact elements 120 are partially arranged or accommodated in the housing 110, and are partially present outside the housing 110. With respect to the latter, each contact element 120 comprises a terminal contact section 121 which is located outside the housing 110 in the region of a mounting side 101 of the connector 100.
  • the mounting side 101 of the connector 100 represents the side by which the connector 100 is mounted on the PCB 200 or on a main side of the PCB 200, and which faces the PCB 200 in the mounted state of the connector 100 (see figure 5 ).
  • the pads 210 of the PCB 200 to be contacted by the contact elements 120 may be further connected to conductors or traces of the PCB 200 (not shown).
  • the PCB 200 comprises, apart from the pads 210 and traces (and further pads 211 described below), an insulating base or carrier material such as FR4 (flame-retardant).
  • the connector housing 110 comprises optional stand-offs 111 protruding from the housing 110 in the region of the mounting side 101 of the connector 100.
  • the stand-offs 111 are intended to rest on the PCB 200 in the mounted state of the connector 100 (see figure 5 ), thus providing a support structure and allowing a predefined assembly position of the connector 100 on the PCB 200.
  • two stand-offs 111 may be provided which are located in the region of lateral sides of the connector 100 or connector housing 110.
  • the fastening elements 130 are provided for establishing a mechanical connection with the PCB 200, i.e. with metallic pads 211 of the PCB 200, via soldering.
  • the pads 211 of the PCB 200 which, in contrast to the pads 210 provided for contacting by the contact elements 120 of the connector 100, are only provided for mechanical fixation. Consequently, these pads 211 may be isolated pads which are not further connected to conductors or traces of the PCB 200.
  • the connector 100 may comprise two fastening elements 130 which are located in the region of or near lateral sides of the connector 100.
  • the fastening elements 130 project over the contact elements 120 and their terminal contact sections 121 and also the stand-offs 111 of the housing 110 in the region of the mounting side 101 of the connector 100. To this end, a corresponding overlap 271 of the fastening elements 130 with respect to the terminal contact sections 121 and the stand-offs 111 is shown in figure 1 .
  • the fastening elements 130 may provide appropriate holding forces. In this way, the contact elements 120 of the electrical connector 100 may be protected against mechanical forces occurring when an electrical counter connector 300 (see figures 8 and 9 ) is plugged on and removed from the connector 100. This allows to avoid the solder connections between the contact elements 120 of the connector 100 and the pads 210 of the PCB 200 from being impaired or undone, or the mounted connector 100 from being detached from the PCB 200.
  • Each of the fastening elements 130 is formed in one piece, or in other words is made integrally or completely from a solder, i.e. a meltable metal alloy which may melt under the influence of heat or by applying an appropriate soldering temperature.
  • the solder material from which the fastening elements 130 are made is a soft solder. This may be a tin-based or tin-lead based solder.
  • the fastening elements 130 may be also referred to as solder tin fastening elements or solder tin brackets.
  • the fastening elements 130 Due to the fastening elements 130 made in one piece from a solder, there are lower coplanarity requirements with regard to a mounting of the electrical connector 100 than in the case of a connector comprising metallic fastening elements in the form of solderable stamped metal parts.
  • the coplanarity is required with respect to the contact elements 120 or their terminal contact sections 121 and the stand-offs 111 of the housing 110.
  • the fastening elements 130 projecting over the contact elements 120 and the stand-offs 111 at the mounting side 101 of the connector 100 do not fall under this requirement.
  • the fastening elements 130 integrally made from a solder may melt in the soldering carried out in the mounting of the connector 100 on the PCB 200, and may therefore change their shape and size in this process.
  • the electrical connector 100 for mechanically fixing comprises, instead of stamped metal parts, the fastening elements 130 made from a solder
  • the mounting of the connector 100 may be also done with a high(er) reliability.
  • the fabrication of the connector 100 may be carried out with a less(er) complexity and at low(er) cost, and the connector 100 may be realized with a small(er) size.
  • the fastening elements 130 are form-fit connected with the housing 110.
  • the housing 110 comprises, for each fastening element 130, a respective cavity 115.
  • the fastening elements 130 are partially accommodated in the associated cavities 115 of the housing 110 and partially protrude from the housing 110 in the region of the mounting side 101 of the connector 100.
  • Each cavity 115 is configured to hold and anchor the respective fastening element 130 to the housing 110 by form-fittingly embracing a portion of the respective fastening element 130.
  • each cavity 115 comprises an anchoring region 160 and a passage region 117 extending from the anchoring region 116 to the outside of the housing 110.
  • Each fastening element 130 comprises an anchoring section 132 and a fastening section 131.
  • the fastening section 131 is provided for making the mechanical connection with the PCB 200 via soldering.
  • the anchoring section 132 is arranged in the anchoring region 116 of the respective cavity 115, and the fastening section 131 extends from the anchoring section 132 through the passage region 117 of the respective cavity 115 and partially protrudes from the housing 110.
  • each fastening element 130 is configured in such a way that the anchoring section 132 comprises a greater cross-sectional width than the fastening section 131.
  • the anchoring region 116 comprises a greater cross-sectional width than the passage region 117.
  • the anchoring section 132 comprises a circular cross-sectional profile
  • the fastening section 131 comprises an elongated rectangular cross-sectional profile.
  • the housing cavities 115 comprise shapes adapted to this with an anchoring region 116 comprising a likewise circular cross-sectional profile and a passage region 117 comprising a rectangular cross-sectional profile.
  • the fastening elements 130 may e.g. comprise a plate-shaped design as indicated, for example, in figures 8 and 9 .
  • an assembly of the electrical connector 100 on the PCB 200 i.e. on a main side of the same intended for mounting, is described, thus producing a device 290.
  • other components or SMD components may be mounted on the PCB 200 together with the connector 100 (not shown).
  • the device 290 may be also referred to as printed circuit board assembly or PCBA.
  • solder paste 240 is applied on the PCB 200 in the region of its connection pads 210, 211.
  • the solder paste 240 comprises a solder portion in the form of solder particles suspended in flux paste. Applying the solder paste 240 on the PCB 200 may be carried out with the aid of a mask or stencil and by using squeegee (not shown in each case).
  • the electrical connector 100 is placed on the PCB 200 with the mounting side 101 of the connector 100 facing the PCB 200 such that the fastening elements 130 and the terminal contact sections 121 of the contact elements 120 are located in the region of the respective pads 210, 211 of the PCB 200.
  • the connector 100 is placed on the PCB 200 only with the fastening elements 130 projecting over the terminal contact sections 121 such that only the fastening elements 130 or their fastening sections 131 get into physical contact with the solder paste 240 or the solder paste 240 and the pads 211 associated with the fastening elements 130.
  • the terminal contact sections 121 of the contact elements 120 are located at a distance from the solder paste 240 and the pads 210 associated with the contact elements 120.
  • the connector 100 is held on the PCB 200 by the sticky solder paste 240.
  • the placing of the connector 100 on the PCB 200 may be carried out by a pick-and-place process using a pick-and-place machine or robot (not shown).
  • the PCB 200 populated with the electrical connector 100 is subjected to a reflow soldering process with the purpose of soldering and thus connecting the fastening elements 130 and terminal contact sections 121 of the contact elements 120 to the respective solder pads 210, 211 of the PCB 200.
  • This process is carried out using a reflow oven 250, with the aid of which a respective heat 251 and thus an appropriate soldering temperature may be provided.
  • the fastening elements 130 integrally made from a solder may melt to an appropriate height and to the effect that the connector 100 sinks towards the PCB 200 and thereby the terminal contact sections 121 of the contact elements 120 get into contact with the solder paste 240.
  • the solder paste 240 may also melt as a result of the applied heat 251, wherein the flux portion of the solder paste 240 is evaporated and electrically conductive solder joints 272 are formed via the melted solder portion of the solder paste 240.
  • the terminal contact sections 121 of the contact elements 120 are soldered and thereby mechanically and electrically connected to the respective pads 210 of the PCB 200.
  • the respective solder 241 originating from the solder paste 240, via which the solder joints 272 between the terminal contact sections 121 of the contact elements 120 and the pads 210 of the PCB 200 are established is shown.
  • the fastening elements 130 the melted fastening elements 130 may merge with the melted solder portion of the solder paste 240 applied on the pads 211, and the fastening elements 130 are soldered and thus mechanically fixed to the pads 211 of the PCB 200.
  • respective solder joints 272 are formed via the fastening elements 130 together with the solder portion of the solder paste 240. After the solder 241 and the fastening elements 130 have cooled and thus solidified, the electrical connector 100 is electrically and mechanically firmly connected to the PCB 200.
  • the connector 100 or its housing 110 may sink up until the stand-offs 111 of the housing 110 touch the PCB 200 and rest on it. This movement may be due to the influence of gravity together with a suction force caused by a wetting of the pads 210, 211 of the PCB 200 with the melted solder 241 and melted fastening elements 130.
  • components or SMD components may be assembled on the PCB 200 together with the electrical connector 100 in order to produce the device 290 shown in figure 5 .
  • These components may be electronic and/or electrical components.
  • such components may be also placed on the PCB 200 provided with the solder paste 240, and the PCB 200 populated with the connector 100 and these components may be subjected to the reflow soldering process (not shown in each case).
  • Figure 6 depicts an enlarged schematic illustration of a section of the device 290 shown in figure 5 comprising the electrical connector 100 mounted on the PCB 200 in order to indicate a possible appearance of the solder joints 272.
  • the solder joints 272 which in relation to the terminal contact sections 121 of the contact elements 120 and the pads 210 of the PCB 200 are realized with the solder 241 resulting from the solder paste 240, the solder 241 may be present between the terminal contact sections 121 and the pads 210, and may also laterally cover or wet the terminal contact sections 121 so that the solder 241 comprises a curved surface or meniscus in this region.
  • solder joints 272 are realized via the fastening elements 130 integrally made from solder and the merged solder of the solder paste 240.
  • a curved surface or meniscus may be present in the region of the pads 211.
  • the fastening elements 130 soldered and mechanically attached to the pads 211 of the PCB 200 may comprise a shape differing from the one shown.
  • the cavities 115 of the housing 110, deviating from figure 6 are no longer completely filled with the fastening elements 130 and their sections 131, 132, wherein the fastening elements 130 continue to be form-fit connected with the housing 110 (not shown in each case).
  • figure 7 shows a schematic lateral view of the connector 100 with a configuration in which the fastening elements 130 form-fit connected with the housing 110 comprise a T-shaped cross-sectional profile in that both the anchoring section 132 and the fastening section 131 comprise a rectangular cross-sectional profile.
  • the cavities 115 of the housing 110 comprise a matched shape with a T-shaped cross-sectional profile in that the anchoring region 116 and the passage region 117 comprise a rectangular cross-sectional profile.
  • the connector 100 with the configuration depicted in figure 7 may be identical to the connector 100 described above, and may likewise be mounted on a PCB 200 in a manner corresponding to that of figures 2 to 5 .
  • fastening elements 130 of the electrical connector 100 may include fastening elements 130 with other anchoring sections 132 polygonal in cross-section, such as triagonal anchoring sections 132. Such shapes may also apply to the anchoring regions 116 of the cavities 115.
  • the cavities 115 of the housing 110 variants may be considered in which the cavities 115 only comprise an anchoring region 116 such as a circular or polygonal anchoring region 116 in cross-section, the anchoring region 116 being adjacent to or merging to the outside of the housing 110, wherein no additional passage region 117 is present (not shown in each case).
  • the electrical connector 100 is configured to be pluggable with an electrical counter connector 300 so that respective electrical signal and power connections may be established with the PCB 200 (and other components arranged thereon).
  • the connector housing 110 may comprise a receiving chamber 119 for receiving such a counter connector 300.
  • figure 8 shows a schematic lateral illustration of the electrical connector 100 implemented in this way.
  • the view shown here may represent a view of the connector 100 depicted in figure 1 rotated by 90°.
  • the housing 110 of the electrical connector 100 comprises a receiving chamber 119 provided for receiving an electrical counter connector 300, i.e. a counter connector housing 310 of the same.
  • the counter connector 300 which may be connected to a cable 330, comprises counter contact elements 320.
  • the contact elements 120 of the electrical connector 100 which are arranged at the housing 110 comprise a stepped shape, wherein the terminal contact sections 121 form one end of the contact elements 120 and extend laterally from the housing 110 at the mounting side 101 of the connector 100.
  • the contact elements 120 may be realized in such a way that the terminal contact sections 121 are spring contact sections.
  • each contact element 120 comprises a plug contact section 125 located in the receiving chamber 119 of the housing 110 which forms another end of the contact elements 120.
  • the plug contact sections 125 are provided to be engaged and thus contacted by the counter contact elements 320 of the electrical counter connector 300 when the counter connector 300 is plugged on the electrical connector 100.
  • the plug contact sections 125 of the contact elements 120 and respective counter contact sections of the counter contact elements 320 are realized in the form of matched pin and socket contact sections.
  • the plug contact sections 125 are realized as pin contact sections
  • the counter contact sections are realized as socket contact sections.
  • Figure 8 represents a configuration in which the electrical counter connector 300 may be plugged on the electrical connector 100 in a direction, indicated by an arrow in figure 8 , perpendicular to the mounting side 101 of the connector 100.
  • the connector 100 may be also referred to as 90° connector or 90° header.
  • figure 9 shows a schematic lateral illustration of the connector 100 and of an electrical counter connector 300 which may be plugged on the connector 100 in a direction, indicated by an arrow in figure 9 , horizontal to the mounting side 101 of the connector 100.
  • the connector 100 may be also referred to as 180° connector or 180° header.
  • the connector housing 110 comprises a receiving chamber 119 for receiving the counter connector 300 or a counter connector housing 310 of the same.
  • the counter connector 300 comprises counter contact elements 320, and may be assembled with a cable 330.
  • the contact elements 120 of the electrical connector 100 comprise a stepped shape, wherein the terminal contact sections 121 form one end of the contact elements 120 and extend laterally from the housing 110 at the mounting side 101 of the connector 100.
  • a two-row arrangement of contact elements 120 may be provided, wherein in each row, the contact elements 120 are arranged next to each other in a direction perpendicular to the drawing plane of figure 9 .
  • the terminal contact sections 121 extend into opposite directions (left and right in figure 9 ).
  • the contact elements 120 comprise a plug contact section 125 located in the receiving chamber 119 of the housing 110 which forms another end of the contact elements 120.
  • the plug contact sections 125 of the contact elements 120 and respective counter contact sections of the counter contact elements 320 are realized in the form of matched pin and socket contact sections such that the contact elements 120 of the connector 100 may be engaged and thus contacted by the counter contact elements 320 of the counter connector 300 when the counter connector 300 is plugged on the electrical connector 100.
  • contact elements 120 comprising terminal contact sections 121 to be soldered onto pads 210 of a PCB 200
  • a configuration of the electrical connector 100 comprising contact elements 120 with a pin contact section 122 may be employed.
  • figure 10 shows a schematic lateral view of the electrical connector 100 and a PCB 200 according to a configuration, in which the contact elements 120 of the connector 100 that are arranged at and partially accommodated in the housing 110 comprise pin contact sections 122, and the PCB 200 comprises through-contacts 220 corresponding to the pin contact sections 122.
  • the pin contact sections 122 of the contact elements 120 are located outside the housing 110 in the region of the mounting side 101 of the connector 100.
  • the pin contact sections 121 are applied to make an electrical connection between the contact elements 120 of the connector 100 and respective through-contacts 220 of the PCB 200 into which the pin contact sections 122 may be inserted.
  • the through-contacts 220 of the PCB 200 are realized as plated through-holes, i.e.
  • the metallic coating 221 may be present not only at inner walls of the through-holes, but also at the opposite main sides of the PCB 200.
  • the through-contacts 220 of the PCB 200 to be contacted by the contact elements 120 may be further connected to conductors or traces of the PCB 200 (not shown).
  • the electrical connector 100 and the PCB 200 with the implementation depicted in figure 10 may correspond to the connector 100 and PCB 200 described above.
  • This relates to the configuration of the connector 100 with the fastening elements 130 integrally formed from a solder, the connector housing 110 comprising cavities 115 for partially accommodating the fastening elements 130 and comprising the optional stand-offs 111, and the metallic pads 211 of the PCB 200 provided for fixation with the fastening elements 130.
  • the pin contact sections 122 of the contact elements 120 project over the fastening elements 130
  • the fastening elements 130 project over the stand-offs 111 of the housing 110 in the region of the mounting side 101 of the connector 100.
  • a solder paste 240 is applied on the PCB 200 in the region of its through-contacts 220 and pads 211. This process may be carried out with the aid of a mask or stencil and by using a squeegee (not shown). With regard to the through-contacts 220, the solder paste 240 may be applied on the PCB 200 in such a way that the through-contacts 220 are filled with the solder paste 240, as indicated in figure 11 .
  • the electrical connector 100 is placed on the PCB 200 with the mounting side 101 of the connector 100 facing the PCB 200 such that the fastening elements 130 and the pin contact sections 122 of the contact elements 120 are located in the region of the respective pads 211 and through-contacts 220 of the PCB 200.
  • the pin contact sections 122 are inserted into and through respective through-contacts 220 of the PCB 200, thus coming into physical contact with the solder paste 240 or the solder paste 240 and the trough-contacts 220.
  • the placing is carried out such that the fastening elements 130 or their fastening sections 131 also get into physical contact with the solder paste 240 or the solder paste 240 and the pads 211 associated with the fastening elements 130.
  • the placing of the connector 100 on the PCB 200 may be carried out by a pick-and-place process using a pick-and-place machine or robot (not shown).
  • the PCB 200 populated with the electrical connector 100 is subjected to a reflow soldering process using a reflow oven 250 in order to solder and thereby connect the fastening elements 130 and the pin contact sections 122 of the contact elements 120 to the respective pads 211 and through-contacts 220 of the PCB 200.
  • the fastening elements 130 integrally formed from a solder may melt to the effect that the connector 100 or connector housing 110 sinks towards the PCB 200.
  • the solder paste 240 may also melt as a result of the applied heat 251, wherein the flux portion of the solder paste 240 is evaporated and electrically conductive solder joints 272 are formed via the melted solder portion of the solder paste 240.
  • the pin contact sections 122 of the contact elements 120 are soldered and thus mechanically and electrically connected to the respective through-contacts 220 of the PCB 200.
  • the mounting and soldering of the connector 100 may be also referred to as pin-in-paste process.
  • the respective solder 241 resulting from the solder paste 240, via which the solder joints 272 between the pin contact sections 122 and the through-contacts 220 are made, is depicted.
  • the melted fastening elements 130 may merge with the melted solder portion of the solder paste 240 applied on the pads 211, and the fastening elements 130 are soldered and thereby mechanically attached to the pads 211 of the PCB 200.
  • the respective solder joints 272 are formed via the fastening elements 130 together with the solder portion of the solder paste 240.
  • the sinking of the electrical connector 100 or its housing 110 towards the PCB 200 occurring in the soldering process takes place up until the stand-offs 111 of the housing 110 touch the PCB 200 and rest on it.
  • the sinking may be caused by gravity and a suction force due to a wetting of the pads 211 of the PCB 200 with the melted fastening elements 130.
  • Figure 14 shows an enlarged schematic illustration of a section of the device 290 depicted in figure 13 comprising the electrical connector 100 mounted on the PCB 200 in order to indicate a possible appearance of the solder joints 272.
  • the solder joints 272 which in relation to the pin contact sections 122 of the contact elements 120 and the through-contacts 220 of the PCB 200 are realized with the solder 241 originating from the solder paste 240, the solder 241 may be present between the pin contact sections 122 and the metallic coating 221 of the through-contacts 220, and may also cover the metallic coating 221 at the main sides of the PCB 200 and laterally cover the pin contact sections 122 so that the solder 241 comprises a curved surface or meniscus in this region.
  • solder joints 272 are realized via the fastening elements 130 made from solder and the merged solder of the solder paste 240, wherein a curved surface or meniscus may be present in the region of the pads 211.
  • the fastening elements 130 may comprise, deviating from figure 10 , other shapes and cross-sectional profiles such as a T-shaped profile as shown in figure 7 .
  • the connector 100 may be realized with a configuration corresponding to figures 8 and 9 .
  • the contact elements 120 may comprise, in addition to the pin contact sections 122 forming one end, plug contact sections 125 located in the receiving chamber 119 of the housing 110 and forming another end of the contact elements 120 (not shown in each case).
  • the electrical connector 100 may be realized with only one or a greater number of fastening elements 130 integrally made from a solder. Moreover, a connector housing 110 may be realized without stand-offs 111.

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  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Coupling Device And Connection With Printed Circuit (AREA)
EP22202773.2A 2022-10-20 2022-10-20 Elektrischer verbinder für eine leiterplatte Pending EP4358313A1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP22202773.2A EP4358313A1 (de) 2022-10-20 2022-10-20 Elektrischer verbinder für eine leiterplatte

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP22202773.2A EP4358313A1 (de) 2022-10-20 2022-10-20 Elektrischer verbinder für eine leiterplatte

Publications (1)

Publication Number Publication Date
EP4358313A1 true EP4358313A1 (de) 2024-04-24

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP22202773.2A Pending EP4358313A1 (de) 2022-10-20 2022-10-20 Elektrischer verbinder für eine leiterplatte

Country Status (1)

Country Link
EP (1) EP4358313A1 (de)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2284948A (en) * 1993-12-02 1995-06-21 Whitaker Corp Surface mount connector and method of making same
US6196871B1 (en) * 1999-02-02 2001-03-06 Hon Hai Precision Ind. Co., Ltd. Method for adjusting differential thermal expansion between an electrical socket and a circuit board
US20050085102A1 (en) * 2003-10-16 2005-04-21 Pollock John A. Coupling and method for producing a hermetic seal
DE202017106388U1 (de) * 2016-11-15 2018-02-16 Lear Corporation Anpassbare Leiterplattenanordnung
US20190067838A1 (en) * 2017-08-28 2019-02-28 Lotes Co., Ltd Connector

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2284948A (en) * 1993-12-02 1995-06-21 Whitaker Corp Surface mount connector and method of making same
US6196871B1 (en) * 1999-02-02 2001-03-06 Hon Hai Precision Ind. Co., Ltd. Method for adjusting differential thermal expansion between an electrical socket and a circuit board
US20050085102A1 (en) * 2003-10-16 2005-04-21 Pollock John A. Coupling and method for producing a hermetic seal
DE202017106388U1 (de) * 2016-11-15 2018-02-16 Lear Corporation Anpassbare Leiterplattenanordnung
US20190067838A1 (en) * 2017-08-28 2019-02-28 Lotes Co., Ltd Connector

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