CN116528473B - Transfer card and transfer card manufacturing method - Google Patents
Transfer card and transfer card manufacturing method Download PDFInfo
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- CN116528473B CN116528473B CN202310818829.1A CN202310818829A CN116528473B CN 116528473 B CN116528473 B CN 116528473B CN 202310818829 A CN202310818829 A CN 202310818829A CN 116528473 B CN116528473 B CN 116528473B
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- 238000004519 manufacturing process Methods 0.000 title claims description 16
- 239000002344 surface layer Substances 0.000 claims abstract description 68
- 239000010410 layer Substances 0.000 claims abstract description 8
- 238000003466 welding Methods 0.000 claims abstract description 6
- 238000000034 method Methods 0.000 claims description 21
- 238000004080 punching Methods 0.000 description 6
- 230000008054 signal transmission Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 230000002411 adverse Effects 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005476 soldering Methods 0.000 description 2
- QTBSBXVTEAMEQO-UHFFFAOYSA-M Acetate Chemical compound CC([O-])=O QTBSBXVTEAMEQO-UHFFFAOYSA-M 0.000 description 1
- 239000002390 adhesive tape Substances 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
- 239000010931 gold Substances 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
Classifications
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K1/00—Printed circuits
- H05K1/18—Printed circuits structurally associated with non-printed electric components
- H05K1/182—Printed circuits structurally associated with non-printed electric components associated with components mounted in the printed circuit board, e.g. insert mounted components [IMC]
- H05K1/185—Components encapsulated in the insulating substrate of the printed circuit or incorporated in internal layers of a multilayer circuit
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F1/00—Details not covered by groups G06F3/00 - G06F13/00 and G06F21/00
- G06F1/16—Constructional details or arrangements
- G06F1/18—Packaging or power distribution
- G06F1/183—Internal mounting support structures, e.g. for printed circuit boards, internal connecting means
- G06F1/184—Mounting of motherboards
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F13/00—Interconnection of, or transfer of information or other signals between, memories, input/output devices or central processing units
- G06F13/38—Information transfer, e.g. on bus
- G06F13/40—Bus structure
- G06F13/4063—Device-to-bus coupling
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F13/00—Interconnection of, or transfer of information or other signals between, memories, input/output devices or central processing units
- G06F13/38—Information transfer, e.g. on bus
- G06F13/42—Bus transfer protocol, e.g. handshake; Synchronisation
- G06F13/4282—Bus transfer protocol, e.g. handshake; Synchronisation on a serial bus, e.g. I2C bus, SPI bus
- G06F13/4291—Bus transfer protocol, e.g. handshake; Synchronisation on a serial bus, e.g. I2C bus, SPI bus using a clocked protocol
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- 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
-
- 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
- H05K1/117—Pads along the edge of rigid circuit boards, e.g. for pluggable connectors
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K1/00—Printed circuits
- H05K1/18—Printed circuits structurally associated with non-printed electric components
- H05K1/181—Printed circuits structurally associated with non-printed electric components associated with surface mounted components
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K2201/00—Indexing scheme relating to printed circuits covered by H05K1/00
- H05K2201/10—Details of components or other objects attached to or integrated in a printed circuit board
- H05K2201/10227—Other objects, e.g. metallic pieces
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K2201/00—Indexing scheme relating to printed circuits covered by H05K1/00
- H05K2201/10—Details of components or other objects attached to or integrated in a printed circuit board
- H05K2201/10227—Other objects, e.g. metallic pieces
- H05K2201/10356—Cables
Abstract
The application provides an adapter card, comprising: at least two layers of circuit boards; the surface layer of the circuit board includes: the clock is connected with the contact piece, the at least one fixing piece and the clock; the fixing pieces are respectively fixed at the connecting points of all PCIe wire harnesses in the wire harness and the surface layer, and the distances between the PCIe wire harnesses and the contact pieces are equal; the clock is led out of a number of clock cables at least equal to the number of PCIe wire bundles; leading out the clock cable for transmitting the clock signal to a surface layer by directly welding the cable; the redundant length from the leading-out point of the clock cable to the surface layer to the fixing piece for fixing the clock cable is basically equal to the redundant length from the connecting point of the PCIe harness fixed by the same fixing piece for fixing the clock cable to the fixing piece for fixing the PCIe harness. The application solves the problems of lower supporting rate, poorer flexibility, higher signal attenuation, high expansion rate based on the connection card, flexible arrangement and reduced signal attenuation in the existing expansion mode.
Description
Technical Field
The application relates to the field of server expansion, in particular to a transfer card and a transfer card manufacturing method.
Background
For the main board using the standard PCIe slot as the PCIe expansion interface, common expansion modes include a mode of hard connection of a riser card, cable connection of a repeater chip, and the like. The method for hard connection of the adapter card lacks flexibility in structural arrangement, the method for connecting the adapter card with the cable easily causes signal transmission to be influenced, the cost of the method for connecting the adapter chip with the cable is high, and the technical problems of poor flexibility, high signal attenuation and high cost cannot be solved in the expansion method.
Disclosure of Invention
In order to solve the technical problems of poor flexibility, high signal attenuation and high cost of the existing expansion mode, the first aspect of the application provides a switching card, which comprises:
at least two layers of circuit boards;
the surface layer of the circuit board includes:
a connection contact on a first side of the surface layer,
at least one fastener located on a different side of the surface layer than the first side; the fixing piece is used for fixing a wire harness, and the wire harness comprises a clock cable and a PCIe wire harness; the fixing pieces are respectively used for fixing connection points of all PCIe wire harnesses in the wire harnesses and the surface layer, and the distances from the PCIe wire harnesses to the connection contact pieces are equal;
the surface layer is provided with clocks, and the clocks lead out clock cables with the number at least equal to that of PCIe wire bundles; leading out the clock cable for transmitting the clock signal to the surface layer by directly welding the cable;
the redundant length from the leading-out point of the clock cable to the surface layer to the fixing piece for fixing the clock cable is basically equal to the redundant length from the connecting point of the PCIe harness fixed by the same fixing piece for fixing the clock cable to the fixing piece for fixing the PCIe harness.
In some embodiments, the surface layer includes a first surface and a second surface;
the first surface is provided with a connecting point of the fixing piece and the PCIe wire harness on the surface layer;
the fixing piece is not arranged on the second surface, and the connecting point of the PCIe harness on the surface layer is arranged on the second surface;
the first surface or the second surface is provided with a leading-out point of the clock cable on the surface layer.
In some embodiments, the adapter card includes a hollowed-out area; the hollowed-out area is used for leading the PCIe harness and the clock cable connected with the connection point of the second surface to pass through the hollowed-out area to the first surface, and to be led out after being fixed by the fixing piece,
and the hollowed-out area is used for enabling the clock cable led out through the second surface to pass through the hollowed-out area and the PCIe harness connected with the connection point of the first surface, and the clock cable is led out after being fixed by the fixing piece.
In some embodiments, the adapter card includes a hollowed-out area; the hollowed-out area is used for enabling the PCIe wire harness connected with the connection point of the second surface and the clock cable led out through the first surface to pass through the hollowed-out area to be led out after being fixed by the fixing piece.
In some embodiments, the adapter card includes a non-right angle side; the fixing piece is positioned on the non-right-angle side of the adapter card; the length or the inclination angle of the non-right-angle side is determined according to the positions and the number of the fixing pieces.
In some embodiments, the position of the fixture is determined based on a range of intersection areas of the clock cable in the harness and the PCIe harness in a relaxed state.
In some embodiments, the fixture includes a raised arcuate structure and a planar structure in contact with the adapter card surface layer;
the height and width of the arc structure are determined according to the diameter of the wire harness received by the arc structure.
In some embodiments, the connection point of the PCIe harness to the surface layer is disposed proximate to the connection contact.
In some embodiments, the location of the fixture falls within the range: so that all PCIe cables in the PCIe harness secured by the securing member are in a relaxed state, and redundant lengths of all PCIe cables in the PCIe harness are below a first threshold.
A second aspect of the present application provides a method for manufacturing an adapter card, for manufacturing any one of the foregoing adapter cards, including:
manufacturing a circuit board comprising a clock and a surface layer connected with a contact piece;
connecting a PCIe harness to the surface layer;
leading out a clock cable to the surface layer by directly welding the cable;
and at least one fixing piece is arranged on the circuit board, and each PCIe wire harness and one clock cable are respectively fixed by adopting the fixing piece to form the adapter card.
The PCIe cable is welded to the direct vicinity of the connecting contact, and the signal wiring is arranged on the surface layer as far as possible to avoid the through hole, so that the signal enters the high-speed cable as soon as possible in a mode that the high-speed cable replaces the wiring of the circuit board, and signal attenuation caused by wiring in the circuit board is avoided. According to the application, clock signals are directly led out to the surface layer in a cable mode, so that the influence on the clock signal quality caused by via hole punching and circuit board wiring is avoided, and the loss of circuit board signals without cable loss is lower. The loose degree of each wire harness of the clock cable and the PCIe wire harness between the connecting point and the fixing piece is basically equal, so that connection faults caused by pulling in the subsequent assembly process are avoided. The adapter card provided by the application does not need to adopt an adapter or a chip forming additional expense, and has low cost.
Drawings
Fig. 1 is a front view of a patch card according to an exemplary embodiment of the present application;
FIG. 2 is a rear block diagram of an adapter card according to an exemplary embodiment of the present application;
FIG. 3 is a block diagram of a mounting for an adapter card according to an exemplary embodiment of the present application;
fig. 4 is a flowchart of a method for manufacturing a riser card according to an exemplary embodiment of the present application.
Detailed Description
Reference will now be made in detail to exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, the same numbers in different drawings refer to the same or similar elements, unless otherwise indicated. The implementations described in the following exemplary examples do not represent all implementations consistent with the application. Rather, they are merely examples of apparatus and methods consistent with aspects of the application as detailed in the accompanying claims.
The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used in this specification and the appended claims, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It should also be understood that the term "and/or" as used herein refers to and encompasses any or all possible combinations of one or more of the associated listed items.
It should be understood that although the terms first, second, third, etc. may be used herein to describe various information, these information should not be limited by these terms. These terms are only used to distinguish one type of information from another. For example, first information may also be referred to as second information, and similarly, second information may also be referred to as first information, without departing from the scope of the application. The word "if" as used herein may be interpreted as "at … …" or "at … …" or "responsive to a determination", depending on the context.
The PCIe interfaces commonly used at present comprise standard PCIe slots, slimsas, mcio and the like, wherein the slimsas and mcio interfaces are small in size, high in supported PCIe speed, and are widely used in newer server mainboards, and are suitable for PCIe expansion connection from the mainboards to expansion boards, such as hard disk backboard, GPU card adapter board and the like.
For a motherboard using a standard PCIe slot as a PCIe expansion interface, common expansion manners include a manner of hard connection of a riser card, cable connection of a repeater chip, and the like.
The manner in which the riser card is hard-wired lacks flexibility in the structural arrangement. Taking a PCIe slot adapter card supporting a standard PCIe slot as an example, the PCIe bit width supported by the golden finger is x16, and the PCIe slot adapter card is used for transferring x16 signals on a PCIe slot of a motherboard into two PCIe x16 slots and one PCIe x8 slot. The method for hard connection of the adapter card is often used for interface direction conversion and short-distance expansion near a main board standard PCIe slot, but is limited by attenuation of high-speed signals on the PCB of the adapter card and limitation of the internal structure of a server case, and the method for hard connection of the adapter card is not suitable for long-distance PCIe signal expansion in the server case, and has poor structural arrangement flexibility.
The way the adapter card is connected to the cable easily causes the adverse effect of signal transmission. Taking a support standard PCIe slot adapter card as an example, for example, the adapter card is used for transferring two slot high-speed cable interfaces, so that the problem of structural arrangement flexibility of the hard connection mode of the adapter card is solved. The attenuation of the high-speed cable is smaller than that of the PCB wiring, and the expansion distance of PCIe signals in the chassis is prolonged. However, since the switch card needs to add one connector switch, such as slimsas connector, and the length of the PCB trace on the switch card is 2-3 inches, the total PCIe line loss is increased by 4-4db, which adversely affects the high-speed signal transmission.
The manner in which the retimer chip is connected to the cable is costly. In order to solve the problem of signal attenuation in the way of switching from a switch card to a cable connection, a server manufacturer adopts a repeater chip to switch from the cable connection to the PCIe signal enhancement. For example, a common use of PCIe signals on a server motherboard for longer range expansion is to place a retimer chip under the heat sink to compensate for 28db of signal attenuation. However, the cost of the retimer chip is high, and six retimer chips are needed under the condition of meeting the requirement of a 24nvme hard disk, so that the cost is increased by more than five thousand yuan. In addition, the self power consumption of the re-timer chip is higher, extra 60 watts of power consumption is caused to the server, and the pressure of heat dissipation and power consumption of the system is increased.
In view of this, the present embodiment provides a transfer card and a method for manufacturing a transfer card, in which a high-speed cable is directly soldered near a gold finger as a contact piece, and clock signals are directly led out to a surface in a cable manner, so that signal transmission efficiency is improved, structural arrangement is flexible, and cost is low.
Fig. 1 is a front structural view of a patch card according to an exemplary embodiment, and fig. 2 is a rear structural view of a patch card according to an exemplary embodiment.
Referring to fig. 1-2, the adapter card provided in this embodiment adopts a half-height half-length PCIe card structure, and shortens the size based on the general standard size of the PCIe card structure. The length of the universal standard adapter card is 167.65mm, the length of the adapter card provided by the embodiment is not more than 150mm, and the height of the adapter card is not more than 68.9mm. The size is consistent with the size of a re-timer card commonly used on a server, so that the same structure fixing mode is maintained, and the connection card provided by the embodiment has certain compatibility and universality.
The adapter card provided in this exemplary embodiment includes: at least two-layer circuit board, wherein the surface layer of at least two-layer circuit board includes: the connecting contact 111 and the connecting contact 112 are positioned on the first side of the surface layer, and the at least one fixing piece 2 is positioned on the different side of the surface layer from the first side.
The fixing member 2 is for fixing the wire harness 3. Each harness 3 includes one clock cable 4 and a set of PCIe harnesses 5 that aggregate several PCIe cables. In the present embodiment, the harness 3 is composed of one clock cable 4 and PCIe cables for four PCIe X4 signals. The fixing pieces 2 are respectively fixed at the connection points of all PCIe wire harnesses 5 in the wire harness 3 and the surface layer, and the distances between the PCIe wire harnesses and the contact pieces are equal.
The surface layer is further provided with clocks 7, and the clocks at least lead out clock cables 4 with the number equal to that of the PCIe wire bundles 5, so that each group of PCIe wire bundles 5 can be led out after being combined with one clock cable 4. The clock cable 4 is led out to the surface layer by means of direct soldering of the cable instead of via-punching in combination with PCB routing.
In this embodiment, a clock of 1 minute and 4 minutes is used to divide the 1-way 100MHz clock output by the contact 111 or the contact 112 into 4-way 100MHz clocks, and the clocks are led out to the surface layer through the clock cable 4.
The redundant length from the leading-out point of the clock cable 4 to the fixing member fixing the clock cable 4 is substantially equal to the redundant length from the connecting point of the PCIe harness 5 fixed by the same fixing member 2 fixing the clock cable 4 to the fixing member 2 fixing the PCIe harness 5 at the surface layer.
The PCIe cable within PCIe harness 5 is a high speed cable. Because the attenuation caused by the routing of the PCB is greater than that caused by the high-speed cable, the vias required for routing between the layers of the PCB and the connectors on the PCB all generate higher loss to the signal for the higher-speed cable.
In the embodiment, the PCIe cable is directly welded near the golden finger by using the golden finger as the connecting piece without adopting a connector or a chip with extra cost, and the high-speed cable is used for replacing the wiring mode of the circuit board, so that the transmission distance of the wiring through the circuit board is as short as possible, and the signal can enter the high-speed cable as soon as possible. In addition, the signal wiring is arranged on the surface layer as much as possible in the embodiment so as to avoid the through holes and reduce the signal attenuation caused by the wiring in the circuit board. Because the clock lines cannot be arranged on the same layer, namely the branched multi-channel clock signals cannot be arranged on the surface layer, the clock signals are directly led out to the surface layer in a cable mode, and the influence on the signal quality due to via holes and circuit board wiring is avoided, so that the loss of the circuit board signals without cable loss is controlled within 1 db.
The looseness degree of each wire harness of the clock cable and the PCIe wire harness between the connecting point and the fixing piece is basically equal, so that connection faults caused by pulling in the subsequent assembly process are avoided.
With continued reference to fig. 1 and 2, the surface layer includes a front surface 110 of the adapter card and a back surface 120 of the adapter card. The front 110 of the adapter card is provided with a front connecting contact 111, a fixing piece 2, an outgoing point 113 of the clock cable 4 and a connecting point 112 of the PCIe harness 5 on the front 110. Each group of PCIe wire harnesses 5 connected to the connection point 112 of the front face 110 are respectively combined with one clock cable 4 led out through the led-out point 113 of the front face 110 and fixed by the fixing member 2 located on the front face 110 of the adapter card.
The back 120 of the riser card is provided with front contact pads 121 and connection points 122 of the PCIe harness 5 at the back 120. Each group of PCIe wire harnesses 5 connected to the connection point 122 of the back side 120 are respectively combined with one clock cable 4 led out through the lead-out point 113 of the front side 110 and fixed by the fixing member 2 located on the front side 110 of the riser card.
It will be appreciated that the PCIe harness 5 may be routed on either the front face 110 or the back face 120 of the connector card, depending on the application requirements. The PCIe harness 5 required to be connected to the back surface 120 of the adapter card is not required to be led to the front surface for connection through a via hole, but is directly led out from the back surface 120 of the adapter card, and is combined with the clock cable 4 led out from the front surface 110 of the adapter card, and is fixed through the fixing piece 2 positioned on the front surface 110 of the adapter card, so that signal attenuation caused by the via hole is reduced.
Referring to fig. 1-2, the adapter card includes a hollowed-out area 6. The hollowed-out area 6 is used for combining each group of PCIe wire harnesses 5 connected with the back surface 120 of the adapter card with one clock cable 4 led out through the leading-out point 113 of the front surface 110, and leading out the clock cables after being fixed by the fixing piece 2.
In an embodiment not shown, the clock cable may be routed through the back of the riser card. When the clock cable is led out through the back of the adapter card, namely, when the clock cable is led out and the fixing piece are not on the same surface, the clock cable also needs to pass through the hollowed-out area to the front of the adapter card so as to be fixed by the fixing piece. At the moment, a PCIe wire harness connected with the connection point on the front side of the connection card is combined with a cable of the clock led out from the back side of the adapter card through the hollowed-out area and is fixedly led out by the fixing piece; PCIe harness connected with the connection point at the back of the connection card and the cable of the clock led out from the back of the transfer card are led out from the back of the transfer card to the front of the transfer card through the hollowed-out area together and are fixedly led out by the fixing piece.
The hollowed-out area that this embodiment set up for the front and the back of linking card all can be according to linking card's wiring and application needs, set up minimum loss linking card surface and PCIe tie point connecting cable's mode, and do not produce unnecessary loss because of connecting at linking card back in the follow-up fixed in-process. Namely, the connecting device can meet the requirements that channels with smaller loss are led out from the front side of the connecting card and connected with PCIe through the connecting point on the front side of the connecting card, channels with smaller loss are led out from the back side of the connecting card and connected with PCIe through the connecting point on the back side of the connecting card, and a high-speed cable connected with the connecting point on the back side of the connecting card penetrates to the front side of the connecting card through a hollowed-out area and does not need to penetrate to the front side of the connecting card in a through hole punching mode to cause primary loss.
In some embodiments, the adapter card is a non-rectangular structure including at least one non-right angle side. As shown in fig. 1-2, four fixing members 2 are disposed on the oblique side of the adapter card according to the present embodiment. The length or the inclination of the bevel edge is determined according to the positions of the four fixing pieces 2, so that the led wire harness can be bent as soon as possible without being limited by the right-angle edge of the adapter card, and position conflict among multiple wire harnesses and interference among the wire harnesses are avoided. In addition, the design also facilitates the arrangement of cables in the chassis.
Of course, the embodiment shown in fig. 1-2 is a non-limiting manner in which the length and inclination of the non-right angle sides of the adapter card can be adjusted when the number of fixtures 2 is more or less than four, and the positions of the fixtures 2 are adjusted. The position of the fixture 2 may be selected in a range based on the intersection area of the clock cable 4 and PCIe harness 5 in the harness in a relaxed state. The arrangement of the bevel edge is determined along the position of the fixing piece 2, so that the lead-out wire harness can be bent as soon as possible without being limited by unnecessary right-angle edges of the adapter card.
For example, when the number of the fixing members 2 is greater than four, in order to make the wire harness to which the fixing members 2 are respectively fixed collide less, the inclination angle of the oblique side of the adapter card should be greater than that of the oblique side as shown in fig. 1-2 in the setting of the similar clock position, so that the oblique side has a longer inclination length while keeping the width of the adapter card unchanged.
For another example, when the clock cable is positioned farther from the bevel edge, the bevel edge of the riser card may be inclined at an angle greater than that shown in fig. 1-2 so that the bevel edge has a longer incline length to cover more riser card width while maintaining the riser card width.
For example, according to the fixed position requirement of the clock cable 4 and the PCIe harness 5 in a loose state and without excessive redundancy length, the fixing member 2 may also be disposed on two sides of the connection card, and at this time, the connection card may cut two left and right corners on a side far from the connection contact piece, so that the connection card becomes an isosceles or non-isosceles trapezoid.
In addition, PCIe cables collected in the PCIe harness 5 may also be one of factors affecting the setting of the mount 2. The position selection of the fixture 2 may preferably fall within an area range such that all PCIe cables in the PCIe harness to which the fixture is fixed are in a relaxed state, and the redundant length of all PCIe cables in the PCIe harness 5 is below a first threshold value.
In the arrangement process of the wire harness in the chassis after the adapter card is led out, the wire harness is pulled to a certain extent, the PCIe cables in the PCIe wire harness 5 are basically in the same redundancy degree through the arrangement, the situation that the length between the connecting point and the fixing piece of some PCIe cables is too short compared with the length between the connecting point and the fixing piece of other PCIe cables, and the pulling of the PCIe cables with shorter length is further caused, and the PCIe cables are connected with the connecting plate. Likewise, interference with adjacent cables due to loosening of the fixing of certain PCIe cables and unnecessary redundant lengths caused by overlong redundant lengths between connection points and fixing pieces are avoided.
In a preferred exemplary embodiment, the connection point of PCIe harness 5 to the surface layer is disposed near either connection contact pad 111 or connection contact pad 121 so that signals can be routed through the PCB as little as possible, as early as possible, into the cable through the connection point of the surface layer.
Fig. 3 is a block diagram of a fixing member of an adapter card according to an exemplary embodiment.
Referring to fig. 3, the fixing member 2 includes a protruding arc-shaped structure 21 and a planar structure 22 connected to the surface layer of the adapter card. The connection of the planar structure 22 to the surface layer of the adapter card may be secured by means of through holes 23 in the planar structure in combination with screws and nuts or other means of connection. The height and width of the arcuate structure are determined based on the diameter of the wire harness received by the arcuate structure. In order to facilitate the lead-out of the wire harness, the fixing piece 2 is obliquely arranged on the adapter card and basically keeps consistent with the inclination degree of the bevel edge of the adapter card, which is cut off a corner.
The fixing piece 2 is used for binding and fixing the PCIe wire harness and the clock cable, and the direction of the wire harness is forcedly changed, so that the reliability of the structure is enhanced. After the wire harness composed of the PCIe wire harness and the clock cable is fixedly led out through the fixing member 2, a trapping (not shown) may be added every certain distance, so as to further improve the reliability of the cable structure. The distance of the separation may be selected between 100mm and 500mm, preferably 200mm. The mode of increasing the binding for one time at a certain distance can be an acetate adhesive tape.
The foregoing is a specific description of the connection card provided by the present application, and the present application further provides an embodiment of a method for manufacturing a connection card, corresponding to the foregoing embodiment of a connection card.
Fig. 4 is a flowchart of a method for manufacturing an adapter card according to an exemplary embodiment of the present application, referring to fig. 4, the method for manufacturing a connector card according to the present embodiment includes:
s401, manufacturing a circuit board comprising a surface layer provided with a clock and a connecting contact piece.
The length of the circuit board provided by the embodiment is not more than 150mm, and the height of the adapter card is not more than 68.9mm. The size is consistent with the size of a re-timer card commonly used on a server, so that the same structure fixing mode is maintained, and the connection card provided by the embodiment formed on the circuit board has certain compatibility and universality.
The surface layer of the circuit board includes: and the connecting contact piece is positioned on the first side of the surface layer, and the at least one fixing piece is positioned on the different side of the surface layer from the first side.
The surface layer of the circuit board is also provided with a clock, in this embodiment, a clock of 1:4 is used to divide the 1-way 100MHz clock connected with the touch output into a clock of 4-way 100MHz, and the clock is led out to the surface layer through the clock cable 4.
In some embodiments, the circuit board includes a hollowed-out area for guiding PCIe cables connected with the back of the circuit board to the front of the circuit board, and for guiding clock cables to the front of the circuit board when the subsequent clock cables are guided out based on the back of the circuit board.
Therefore, based on application requirements, PCIe cables which are more suitable for connecting the back of the circuit board do not need to be led to the front of the circuit board to be connected in a through hole punching mode to cause further loss, but are led to the front of the circuit board through the hollowed-out area after being led to the PCIe cables of the connecting point of the back of the circuit board, so that signal attenuation caused by the through holes is reduced.
In some embodiments, the adapter card is a non-rectangular structure including at least one non-right angle side. Four fixing pieces are arranged on the inclined side of the adapter card. The length or the inclination of hypotenuse is according to the position determination of four mounting to make the pencil of drawing can not receive the restriction of adapter card right angle limit and buckle as early as possible, avoid the position conflict and the interference between the pencil between the multichannel pencil. In addition, the design also facilitates the arrangement of cables in the chassis.
When the number of the fixing pieces arranged on the circuit board is more than four or less than four, the length and the inclination degree of the non-right-angle side of the adapter card are adjusted accordingly. The position of the fixture may be selected from a range of intersection areas based on the clock cable in the harness and PCIe harness in a relaxed state. The arrangement of the bevel edge is determined along the position of the fixing piece, so that the lead-out wire harness can be bent as soon as possible without being limited by unnecessary right-angle edges of the adapter card.
For example, when the number of the fixing members is greater than four, in order to make the wire harness to which the fixing members are respectively fixed collide less, the inclination angle of the oblique side of the adapter card should be greater than that shown in fig. 1-2 in the arrangement of the similar clock position, so that the oblique side has a longer inclination length while keeping the width of the adapter card unchanged.
For another example, when the clock cable is positioned farther from the bevel edge, the bevel edge of the riser card may be inclined at an angle greater than that shown in fig. 1-2 so that the bevel edge has a longer incline length to cover more riser card width while maintaining the riser card width.
For example, according to the fixed position requirement of the clock cable and the PCIe harness in a loose state and without excessive redundant length, the fixing piece can be arranged on two sides of the connecting card, and at the moment, the connecting card can cut left and right angles at one side far away from the connecting contact piece to form an isosceles or non-isosceles trapezoid.
S402, connecting PCIe wire harnesses to the surface layer.
The PCIe harness may be routed on the front side of the connection pod or on the back side of the pod based on the application needs. PCIe harness needed to be connected with the back of the adapter card is not needed to be led to the front for connection in a through hole punching mode, but is led out directly from the back of the adapter card, so that signal attenuation caused by the through hole is reduced.
In the embodiment, the connector is not adopted, and the PCIe cable is directly welded near the golden finger by taking the golden finger as the connecting contact piece, so that the distance of the PCB wiring is as short as possible, and signals can enter the high-speed cable as soon as possible.
S403, leading the clock cable out to the surface layer by directly welding the cable.
The clock is at least led out the clock cable of quantity equal with PCIe pencil quantity for every group PCIe pencil all can be drawn forth after combining with a clock cable. The clock cable is routed out to the surface layer by direct soldering of the cable rather than via-punching in combination with PCB routing.
The clock may be routed through the front side of the circuit board or through the back side of the circuit board.
S404, arranging at least one fixing piece on the circuit board, and respectively fixing each PCIe harness and one clock cable by adopting the fixing piece to form the adapter card.
The fixing member is used for fixing the wire harness. Each harness includes a clock cable and a set of PCIe harnesses that aggregate several PCIe cables. In this embodiment, the harness is composed of one clock cable and PCIe cables for four PCIe X4 signals. All PCIe wire harnesses in the wire harnesses respectively fixed by the fixing piece are connected with the connection points of the surface layer, and the distances between the PCIe wire harnesses and the connection contact pieces are equal.
The redundant length from the leading-out point of the clock cable to the surface layer to the fixing piece for fixing the clock cable is basically equal to the redundant length from the connecting point of the PCIe harness fixed by the same fixing piece for fixing the clock cable to the fixing piece for fixing the PCIe harness.
PCIe cables grouped within PCIe harnesses may also be one of the factors affecting the setting of the fixtures. The position selection of the fixture may preferably fall within an area range such that all PCIe cables in the PCIe harness to which the fixture is fixed are in a relaxed state, and the redundant length of all PCIe cables in the PCIe harness is below a first threshold.
The method for manufacturing a connection card according to the present embodiment is used for manufacturing any connection card provided in the foregoing embodiment, and the principle and technical effects of the method are similar to those of the connection card according to the foregoing embodiment, and are not repeated herein.
In the embodiment, the PCIe cable is directly welded near the golden finger by using the golden finger as the connecting piece without adopting a connector or a chip with extra cost, and the high-speed cable is used for replacing the wiring mode of the circuit board, so that the transmission distance of the wiring of the circuit board is as short as possible, and the signal wiring is arranged on the surface layer as possible to avoid the via hole, so that the signal enters the high-speed cable as soon as possible, and the signal attenuation caused by the wiring in the PCB board is avoided. Because the clock lines cannot be arranged on the same layer, namely the branched multi-channel clock signals cannot be arranged on the surface layer, the clock signals are directly led out to the surface layer in a cable mode, and the influence on the signal quality due to via holes and circuit board wiring is avoided, so that the loss of the circuit board signals without cable loss is controlled within 1 db. The looseness degree of each wire harness of the clock cable and the PCIe wire harness between the connecting point and the fixing piece is basically equal, so that connection faults caused by pulling in the subsequent assembly process are avoided.
The foregoing description of the preferred embodiments of the application is not intended to be limiting, but rather to enable any modification, equivalent replacement, improvement or the like to be made within the spirit and principles of the application.
Claims (10)
1. An adapter card, comprising:
at least two layers of circuit boards;
the surface layer of the circuit board includes:
a connection contact on a first side of the surface layer,
at least one fastener located on a different side of the surface layer than the first side; the fixing piece is used for fixing a wire harness, and the wire harness comprises a clock cable and a PCIe wire harness; the fixing pieces are respectively used for fixing connection points of all PCIe wire harnesses in the wire harnesses and the surface layer, and the distances from the PCIe wire harnesses to the connection contact pieces are equal;
the surface layer is provided with clocks, and the clocks lead out clock cables with the number at least equal to that of PCIe wire bundles; leading out the clock cable for transmitting the clock signal to the surface layer by directly welding the cable;
the redundant length from the leading-out point of the clock cable to the surface layer to the fixing piece for fixing the clock cable is basically equal to the redundant length from the connecting point of the PCIe harness fixed by the same fixing piece for fixing the clock cable to the fixing piece for fixing the PCIe harness.
2. The adapter card of claim 1, wherein the surface layer comprises a first surface and a second surface;
the first surface is provided with a connecting point of the fixing piece and the PCIe wire harness on the surface layer;
the fixing piece is not arranged on the second surface, and the connecting point of the PCIe harness on the surface layer is arranged on the second surface;
the first surface or the second surface is provided with a leading-out point of the clock cable on the surface layer.
3. The adapter card of claim 2, wherein the adapter card comprises a hollowed-out area; the hollowed-out area is used for leading the PCIe harness and the clock cable connected with the connection point of the second surface to pass through the hollowed-out area to the first surface, and to be led out after being fixed by the fixing piece,
and the hollowed-out area is used for enabling the clock cable led out through the second surface to pass through the hollowed-out area and the PCIe harness connected with the connection point of the first surface, and the clock cable is led out after being fixed by the fixing piece.
4. The adapter card of claim 2, wherein the adapter card comprises a hollowed-out area; the hollowed-out area is used for enabling the PCIe harness connected with the connection point of the second surface to penetrate through the hollowed-out area to the first surface, and the PCIe harness and the clock cable led out through the first surface are led out after being fixed by the fixing piece.
5. The adapter card of claim 1, wherein the adapter card comprises a non-right angle side; the fixing piece is positioned on the non-right-angle side of the adapter card; the length or the inclination angle of the non-right-angle side is determined according to the positions and the number of the fixing pieces.
6. The transit card of claim 5, wherein the location of the fixture is determined based on a range of intersection areas of the clock cable in the harness and the PCIe harness in a relaxed state.
7. The adapter card of claim 1 wherein said securing member comprises a raised arcuate structure and a planar structure in contact with a surface layer of said adapter card;
the height and width of the arc structure are determined according to the diameter of the wire harness received by the arc structure.
8. The transit card of claim 1, wherein a connection point of the PCIe harness to the surface layer is disposed proximate to the connection contact.
9. The adapter card of claim 1 wherein the location of the securing member falls within the range of: so that all PCIe cables in the PCIe harness secured by the securing member are in a relaxed state, and redundant lengths of all PCIe cables in the PCIe harness are below a first threshold.
10. A method for manufacturing an adapter card according to any one of claims 1-9, comprising:
manufacturing a circuit board comprising a clock and a surface layer connected with a contact piece;
connecting a PCIe harness to the surface layer;
leading out a clock cable to the surface layer by directly welding the cable;
and at least one fixing piece is arranged on the circuit board, and each PCIe wire harness and one clock cable are respectively fixed by adopting the fixing piece to form the adapter card.
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| CN202310818829.1A CN116528473B (en) | 2023-07-05 | 2023-07-05 | Transfer card and transfer card manufacturing method |
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| CN116528473A (en) | 2023-08-01 |
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