The subject matter herein relates generally to socket connectors.
Electronic devices, such as computers, workstations and servers, may use numerous types of electronic modules, such as processor and memory modules (e.g. Dynamic Random Access Memory (DRAM), Synchronous Dynamic Random Access Memory (SDRAM), Double Data Rate (DDR) SDRAM, DDR2 SDRAM, DDR3 SDRAM, DDR4 SDRAM, or Extended Data Out Random Access Memory (EDO RAM), and the like). The memory modules are produced in a number of formats such as, for example, Single In-line Memory Module (SIMM), or Dual In-line Memory Modules (DIMM). Typically, the memory modules have a circuit board that is installed in a multi-pin socket connector mounted on a system board or motherboard. Each memory module has a card edge that provides an interface generally between two rows of contacts in the socket connector. The memory modules include memory devices mounted on the circuit board that store data for the electronic device. The memory devices require power to operate, and the power is supplied to the memory devices by the contacts within the socket connector.
Known electronic devices having memory modules are not without disadvantages. For instance, the power requirement to operate the memory devices has increased over time as the electronic devices are designed to operate more quickly and/or as the amount of data being stored by the memory devices is increased. Additionally, the size of the connectors has decreased and/or the number of contacts has increased, leading to smaller contacts and/or a reduced contact pitch in the connectors. Current designs have limitations in the amount of power that can be supplied to the circuit cards. For example, the current carrying capacity of the contacts within the socket connector limits the amount of current that can be passed across the interface between the socket connector and the system board. Moreover, typical memory modules are designed to particular specifications, which limit potential solutions to supplying enough power to the memory modules. For example, some memory modules have specifications that limit the size or footprint of the modules where the corresponding socket connectors have a particular size and contact arrangement. The physical boundary constraints of the modules limit the number and size of the contacts that may be provided within the socket connector.
A need remains for a socket connector that is capable of supplying more power to circuit cards than current socket connectors.
In one embodiment, a socket connector is provided having a dielectric housing extending longitudinally between a first end and a second end. The dielectric housing has a slot that extends longitudinally. The slot is configured to receive a circuit card therein. Contacts are held by the dielectric housing and exposed at the slot. The contacts are configured to be electrically connected to the circuit card. The contacts are configured to be terminated to a circuit board. A latch is provided at the first end and is configured to secure the circuit card in the dielectric housing. The latch includes a power conductor. The power conductor is configured to be electrically connected to the circuit card. The power conductor is configured to be terminated to the circuit board to supply power between the circuit board and the circuit card.
In another embodiment, a socket connector is provided having a dielectric housing extending longitudinally between a first end and a second end. The dielectric housing has a slot extending longitudinally. The slot is configured to receive a circuit card therein. Contacts are held by the dielectric housing and exposed at the slot. The contacts are configured to be electrically connected to the circuit card. The contacts are configured to be terminated to a circuit board. A latch is provided at the first end that is movable between a latched position and an unlatched position. The latch is configured to engage the circuit card in the latched position. The latch holds a power conductor that extends between a first mating interface and a second mating interface. The power conductor is movable with the latch. The first mating interface is mated to the circuit card when the latch is in the latched position. The first mating interface is unmated from the circuit card when the latch is in the unlatched position. The second mating interface is configured to be terminated to the circuit board to supply power between the circuit board and the circuit card.
In a further embodiment, a socket connector system is provided having a circuit card having a circuit board extending between a first edge and a second edge. The circuit board has a card edge that extends between the first and second edges of the circuit board. The circuit board has card contacts at the card edge. The memory card circuit board has an edge power contact at the first edge. The circuit card has at least one memory component terminated to the circuit board that is electrically connected to the edge power contact and at least one of the card contacts. The socket connector system includes a socket connector having a dielectric housing that extends longitudinally between a first end and a second end. The dielectric housing has a slot extending longitudinally. The slot receives the card edge of the circuit board therein. Contacts are held by the dielectric housing and exposed at the slot. The contacts are electrically connected to corresponding card contacts. The contacts are configured to be terminated to a circuit board. A latch is provided at the first end that engages the first edge to secure the circuit card in the dielectric housing. The latch holds a power conductor with the power conductor being configured to be electrically connected to the edge power contact. The power conductor is configured to be terminated to the circuit board to supply power between the circuit board and the circuit card.
In an exemplary embodiment, the memory system includes a circuit card 14 connected to the circuit board 12 by a socket connector 16. The circuit card 14 may be a daughter card and the circuit board 12 may be a motherboard. The circuit card 14 may constitute a Synchronous Dynamic Random Access Memory (SDRAM) module. Optionally, the circuit card 14 may be a Dual In-line Memory Module (DIMM module). Any number of circuit cards 14 may be provided within the memory system. Additionally, any number of memory systems may be provided within the electronic device. In alternative embodiments, the socket connector 16 and circuit card 14 may not be part of a memory system, but rather may have other types of components on the circuit card 14.
In an exemplary embodiment, the socket connector 16 and the circuit card 14 are electrically connected to one or more data devices, such as the electronic modules, for sending data thereto and/or receiving data therefrom. The circuit card 14 stores data generated by the data devices and/or sends stored data to the data devices. The socket connector 16 and the circuit card 14 are connected to the data devices via the circuit board 12.
The circuit card 14 includes a circuit board 32 and a plurality of memory devices 34 coupled to the circuit board 32. The memory devices 34 may be integrated circuit (IC) chips or other electronic components for storing data. Any number of memory devices 34 may be electrically connected to the circuit board 32. In the illustrated embodiment, eight memory devices are mounted to a first side 36 of the circuit board 32. Memory devices 34 may also be mounted to a second side 38 of the circuit board 32. In an alternative embodiment, rather than having memory devices 34 mounted to the circuit board 32, other types of circuits, chips or components may be mounted to the circuit board 32.
The socket connector 16 is coupled to the circuit board 12. In the illustrated embodiment, the socket connector 16 constitutes a card edge connector that receives the circuit card 14 therein. The socket connector 16 may be configured to orient the circuit board 32 at a right angle with respect to the circuit board 12. Optionally, the circuit board 12 may have a generally horizontal orientation and the circuit board 32 may have a generally vertical orientation. Other orientations of the circuit board 32 and/or the circuit board 12 are possible in alternative embodiments, including where the circuit board 32 is oriented parallel to the circuit board 12. In an exemplary embodiment, the circuit board 12 relays both power and data, represented by the arrows 42, 44, respectively, to and/or from the socket connector 16.
In an exemplary embodiment, the socket connector 16 includes first and second latches 70, 72 that hold the circuit card 14 within the socket connector 16. The latches 70, 72 extend away from the circuit board 12. The latches 70, 72 are configured to engage opposite first and second edges 74, 76 of the circuit board 32 to secure the circuit board 32 in the socket connector 16. The latches 70, 72 are pivotably coupled to the housing 60, such as to corresponding extensions 78 extending upward from the mating end 62. The latches 70, 72 are movable between a latched position (shown in
In an exemplary embodiment, as described in further detail below, one or both of the latches 70, 72 include power conductors 100 (shown in phantom). The power conductors 100 supply power from the circuit board 12 to the circuit card 14. The power conductors 100 are movable with the latches 70, 72 to define a separable mating interface with the circuit board 12 and/or the circuit card 14.
A plurality of socket contacts 80 are held by the housing 60 within the slot 66 for mating with the circuit board 32. The socket contacts 80 may have a predetermined contact pattern for mating with a particular type of circuit card 14. Optionally, a subset of the socket contacts 80 may define power contacts 82 and another subset of the socket contacts 80 may define signal or data contacts 84. The socket contacts 80 may define other types of contacts as well, such as ground contacts. The power contacts 82 transmit power from the circuit board 12 to the circuit card 14. The data contacts 84 transmit data between the circuit board 12 and the circuit card 14.
Optionally, the power contacts 82 may be substantially identical in size, shape and/or positioning as the data contacts 84, such that the pinout pattern of the circuit board 12 determines which of the socket contacts 80 receives the power, thus defining power contacts 82, and which of the socket contacts 80 receives the data, thus defining data contacts 84. As such, the same socket connector 16 may have a different arrangement of power contacts 82 and data contacts 84 depending on the particular circuit board 12 to which the socket connector 16 is coupled. In an alternative embodiment, rather than the socket contacts 80 being substantially identically formed, the power contacts 82 may be structurally different than the data contacts 84. For example, the power contacts 82 may have a different size and shape and/or the power contacts 82 may be made from a different material or have a different coating.
The circuit card 14 includes a plurality of socket mating contacts 90 arranged at the card edge 68 of the circuit board 32. In the illustrated embodiment, the socket mating contacts 90 are contact pads and are arranged on both sides 36, 38 of the circuit board 32. The socket mating contacts 90 mate with corresponding socket contacts 80 of the socket connector 16. The socket mating contacts 90 have a similar pattern as the socket contacts 80 for mating thereto. The socket mating contacts 90 are electrically connected to the memory devices 34. Data and/or power are transmitted to and/or from the memory devices 34 through the socket mating contacts 90.
The circuit card 14 includes edge power contacts 92, 94 arranged at the first and second edges 74, 76 of the circuit board 32. The edge power contacts 92, 94 are located remote from the card edge 68 (e.g. the bottom) of the circuit board 32. For example, the edge power contacts 92, 94 may be located approximately centered between the bottom and the top of the circuit board 32. In the illustrated embodiment, the edge power contacts 92, 94 are contact pads. The edge power contacts 92, 94 may be arranged on both sides 36, 38 of the circuit board 32. The edge power contacts 92, 94 are configured to be electrically connected to the power conductors 100 of the latches 70, 72 when the latches 70, 72 are in the latched position. The edge power contacts 92, 94 are electrically connected to the memory devices 34 and supply power to the memory devices 34, such as by traces routed between the edge power contacts 92, 94 and the corresponding memory devices 34. Optionally, a voltage regulator may be provided on the circuit card 14, and the power may be routed through the voltage regulator from the edge power contacts 92, 94 and the socket mating contacts 90 prior to being routed to the memory devices 34.
During assembly, the circuit card 14 is coupled to the socket connector 16 by plugging the card edge 68 of the circuit board 32 into the slot 66. The socket mating contacts 90 engage the socket contacts 80 to create an electrical connection therebetween. Power and data can be transmitted between the socket connector 16 and the circuit card 14 when the circuit card 14 is connected to the socket connector 16. Once the circuit card 14 is loaded into the socket connector 16, the latches 70, 72 are pivoted to the latched position, securing the circuit card 14 in the socket connector 16. In the latched position, the power conductors 100 are electrically connected to, and supply power to, the edge power contacts 92, 94. In an exemplary embodiment, the latches 70, 72 are received in notches 96, 98 in the first and second edges 74, 76 to hold the circuit card 14 in the socket connector 16.
In operation, power and data is transmitted to the circuit card 14 by the socket connector 16. Data is transmitted between the data contacts 84 and the corresponding socket mating contacts 90. Power is transmitted between the power contacts 82 and the corresponding socket mating contacts 90. Power is also transmitted to the circuit card 14 by the power conductors 100 of the latches 70, 72.
The latch 70 includes a top 102 and a bottom 104. The latch 70 includes a side 106 extending between the top 102 and the bottom 104. The latch 70 includes an interior edge 108 and an exterior edge 110 extending between the top 102 and the bottom 104. The interior edge 108 is configured to face the circuit card 14 (shown in
The latch 70 includes mounting features 112 for securing the power conductor 100 to the latch 70. In the illustrated embodiment, the mounting features 112 are open sided channels that receive the power conductor 100. Other types of mounting features may be used in alternative embodiments to secure the power conductor 100 to the latch 70. In some embodiments, the channels may be closed such that at least a portion of the power conductor 100 is encased or entirely surrounded by the latch 70 and/or the mounting feature 112.
The latch 70 includes a head 114 at the top 102. The head 114 extends outward from the side 106. The head 114 includes a nose 116 which is configured to be received in the notch 96 to secure the circuit card 14 within the socket connector 16. The head 114 includes a finger grip 118 on the top surface thereof, which enables an operator to actuate the latch 70.
The power conductor 100 includes a contact body 120 extending between a first end 122 and a second end 124. The first end 122 is configured to engage, and be electrically connected to, the circuit card 14. The second end 124 is configured to engage, and be electrically connected to, the circuit board 12 (shown in
The circuit board 12 includes a power contact 130 for mating with the power conductor 100. In the illustrated embodiment, the power contact 130 is a contact pad on a surface of the circuit board 12. The power conductor 100 is configured to make a physical connection with the power contact 130. In an exemplary embodiment, the power conductor 100 is configured to be physically separable from the power contact 130 for repeated mating and unmating with the power contact 130. In alternative embodiment, the power conductor 100 may be soldered to the power contact 130 such that the second end 124 is fixed with respect to the power contact 130, while the first end 122 is movable with the latch 70. In another alternative embodiment, the power contact 130 may be a plated via through the circuit board 12 and the power conductor 100 may be through-holed mounted to the power contact 130.
The power conductor 100 has a first mating interface 132 at the first end 122 and a second mating interface 134 at the second end 124. The first mating interface 132 defines a separable interface that is matable to, and unmatable from, the edge power contact 92 (shown in
In the illustrated embodiment, the second mating interface 134 defines a separable mating interface that is configured to be matable to, and unmatable from, the power contact 130. The second end 124 is curved to define a spring beam at the second end 124. The second end 124 is deflectable when the power conductor 100 is mated to the circuit board 12 such that the spring beam is compressed and is spring biased against the power contact 130. In an alternative embodiment, rather than defining a separable mating interface, the second end 124 may be soldered to the power contact 130. In such embodiment, pivoting of the latch 70 from the latched position to the unlatched position causes the contact body 120 to flex, while the second end 124 remains fixed to the power contact 130.
During assembly, the latch 70 is moved to the unlatched position. The housing 60 is mounted to the circuit board 12. When the latch 70 is in the unlatched position, the second end 124 is elevated above the base end 61 such that the second end 124 does not interfere with the mounting of the housing 60 to the circuit board 12. Once positioned, the latch 70 may then be moved to the latched position. As the latch 70 is moved to the latched position, the second end 124 begins to engage the power contact 130. The spring beam at the second end 124 is deflected as the latch 70 is moved to the latched position. Optionally, when the second end 124 is positioned in engagement with the power contact 130, the second end 124 may be soldered to the power contact 130.
During use, the latch 70 is rotated from the latched position to the unlatched position so that the circuit card 14 may be plugged into the socket connector 16. Once the latch 70 is clear of the slot 66, the circuit card 14 may be loaded into the slot 66 and then the latch 70 may be moved to the latched position. As the latch 70 is moving to the latched position, the first end 122 of the power conductor 100 begins to engage the edge power contact 92. Such engagement causes the first end 122 to deflect imparting a normal force against the edge power contact 92.
The power conductor 200 includes a first mating contact 202 and a second mating contact 204. The power conductor 200 includes a wire 206 extending between, and electrically connecting, the first and second mating contacts 202, 204. The first mating contact 202 is provided at a first end 208 of the power conductor 200. The second mating contact 204 is provided at a second end 210 of the power conductor 200. The first mating contact 202 includes a first mating interface 212 that is configured to be removably coupled to the circuit card 14 (shown in
The second mating contact 204 includes a tail 216. Optionally, the tail 216 may be soldered to a power contact on the circuit board 12. Alternatively, the tail 216 may be through-hole mounted to a power contact of the circuit board 12. For example, the tail 216 may include a compliant section that may engage a plated via of the circuit board 12. The second mating contact 204 is terminated to the wire 206, such as by a crimp connection, an insulation displacement connection, a solder connection, and the like.
The wire 206 is routed between the first mating contact 202 and the second mating contact 204. The wire 206 is flexible and may be bent when the latch 70 is moved between the latched position and the unlatched position. Such flexibility of the wire 206 relieves stress or strain on the first mating contact 202 and the second mating contact 204 when the latch 70 is moved between the latched position and the unlatched position. The second mating interface 214, which may be soldered to the power contact of the circuit board 12, is less likely to be fatigued or damaged by the movement of the latch 70 between the latched position and the unlatched position because of the flexibility of the wire 206.
It is to be understood that the above description is intended to be illustrative, and not restrictive. For example, the above-described embodiments (and/or aspects thereof) may be used in combination with each other. In addition, many modifications may be made to adapt a particular situation or material to the teachings of the invention without departing from its scope. Dimensions, types of materials, orientations of the various components, and the number and positions of the various components described herein are intended to define parameters of certain embodiments, and are by no means limiting and are merely exemplary embodiments. Many other embodiments and modifications within the spirit and scope of the claims will be apparent to those of skill in the art upon reviewing the above description. The scope of the invention should, therefore, be determined with reference to the appended claims, along with the full scope of equivalents to which such claims are entitled. In the appended claims, the terms “including” and “in which” are used as the plain-English equivalents of the respective terms “comprising” and “wherein.” Moreover, in the following claims, the terms “first,” “second,” and “third,” etc. are used merely as labels, and are not intended to impose numerical requirements on their objects. Further, the limitations of the following claims are not written in means-plus-function format and are not intended to be interpreted based on 35 U.S.C. §112, sixth paragraph, unless and until such claim limitations expressly use the phrase “means for” followed by a statement of function void of further structure.
Number | Name | Date | Kind |
---|---|---|---|
5434752 | Huth et al. | Jul 1995 | A |
5629836 | Wright | May 1997 | A |
5669782 | Yodogawa | Sep 1997 | A |
5997329 | Kosmala | Dec 1999 | A |
6461169 | Harrison et al. | Oct 2002 | B1 |
6780018 | Shipe | Aug 2004 | B1 |
6855009 | Nishiyama | Feb 2005 | B2 |
7037125 | Kuan et al. | May 2006 | B1 |
8147265 | Chiu | Apr 2012 | B2 |
20050208806 | Oila et al. | Sep 2005 | A1 |
20060160390 | Miura et al. | Jul 2006 | A1 |
20070149018 | Gunther et al. | Jun 2007 | A1 |
20080318448 | Ringler et al. | Dec 2008 | A1 |
20120045913 | Bodmann et al. | Feb 2012 | A1 |