CN114614287B - Electric connector and manufacturing method thereof - Google Patents
Electric connector and manufacturing method thereof Download PDFInfo
- Publication number
- CN114614287B CN114614287B CN202210172219.4A CN202210172219A CN114614287B CN 114614287 B CN114614287 B CN 114614287B CN 202210172219 A CN202210172219 A CN 202210172219A CN 114614287 B CN114614287 B CN 114614287B
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- conductive adhesive
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- 238000004519 manufacturing process Methods 0.000 title claims abstract description 14
- 239000007787 solid Substances 0.000 claims abstract description 22
- 239000002184 metal Substances 0.000 claims description 189
- 238000003466 welding Methods 0.000 claims description 71
- 239000000853 adhesive Substances 0.000 claims description 54
- 230000001070 adhesive effect Effects 0.000 claims description 54
- 229910000679 solder Inorganic materials 0.000 claims description 18
- 238000009792 diffusion process Methods 0.000 claims description 9
- 238000005530 etching Methods 0.000 claims description 5
- 238000001746 injection moulding Methods 0.000 claims description 4
- 230000004907 flux Effects 0.000 claims 3
- 230000017525 heat dissipation Effects 0.000 abstract description 8
- 230000000694 effects Effects 0.000 abstract description 7
- 239000012790 adhesive layer Substances 0.000 description 18
- 239000010410 layer Substances 0.000 description 18
- 238000000034 method Methods 0.000 description 17
- 238000005553 drilling Methods 0.000 description 11
- 238000007747 plating Methods 0.000 description 9
- 238000004080 punching Methods 0.000 description 8
- 239000012212 insulator Substances 0.000 description 7
- 230000001681 protective effect Effects 0.000 description 7
- 230000009286 beneficial effect Effects 0.000 description 4
- 239000003292 glue Substances 0.000 description 4
- 238000007731 hot pressing Methods 0.000 description 4
- 230000004308 accommodation Effects 0.000 description 3
- 239000011248 coating agent Substances 0.000 description 3
- 238000000576 coating method Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 239000004020 conductor Substances 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 230000000149 penetrating effect Effects 0.000 description 2
- 238000005476 soldering Methods 0.000 description 2
- 239000002390 adhesive tape Substances 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 238000009713 electroplating Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 230000008054 signal transmission Effects 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
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
- H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
- H01R13/46—Bases; Cases
- H01R13/502—Bases; Cases composed of different pieces
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
- H01R13/02—Contact 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
- H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
- H01R13/02—Contact members
- H01R13/22—Contacts for co-operating by abutting
- H01R13/24—Contacts for co-operating by abutting resilient; resiliently-mounted
- H01R13/2407—Contacts for co-operating by abutting resilient; resiliently-mounted characterized by the resilient means
- H01R13/2414—Contacts for co-operating by abutting resilient; resiliently-mounted characterized by the resilient means conductive elastomers
-
- 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
- H01R43/18—Apparatus or processes specially adapted for manufacturing, assembling, maintaining, or repairing of line connectors or current collectors or for joining electric conductors for manufacturing bases or cases for contact 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
- H01R43/20—Apparatus or processes specially adapted for manufacturing, assembling, maintaining, or repairing of line connectors or current collectors or for joining electric conductors for assembling or disassembling contact members with insulating base, case or sleeve
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Connecting Device With Holders (AREA)
Abstract
The invention discloses an electric connector and a manufacturing method of the electric connector, wherein the electric connector comprises the following components: the solid conducting parts are provided with an upper surface and a lower surface, and the characteristic length of the minimum cross section of the conducting parts in the up-down direction is more than 0.2mm; each conductive terminal is provided with a fixing part, the fixing part is abutted against the corresponding upper surface, a spring arm extends upwards from the fixing part, and the spring arm is used for being abutted against a first electronic element upwards; the contact pieces are respectively and correspondingly abutted to the lower surface and are used for being electrically connected with a second electronic element positioned below the conducting part, so that the electric connector has low resistance, high electrical reliability and good heat dissipation effect.
Description
[ field of technology ]
The present invention relates to an electrical connector and a method for manufacturing the same, and more particularly, to an electrical connector with low resistance, high electrical reliability, and good heat dissipation effect.
[ background Art ]
Chinese patent No. CN201810677328.5 discloses a connector structure comprising a dielectric layer, a first conductive elastic cantilever and at least a second conductive elastic cantilever. The dielectric layer is provided with a first surface and a second surface which are opposite, a first adhesive layer is formed on the first surface, a second adhesive layer is formed on the second surface, the first conductive elastic cantilever comprises a first fixed end part and a first free end part, the second conductive elastic cantilever comprises a second fixed end part and a second free end part, each first fixed end part is fixed on the first adhesive layer, and each second fixed end part is fixed on the second adhesive layer; then, through holes penetrating each first fixed end part, each first adhesive layer, each dielectric layer, each second adhesive layer and each corresponding second fixed end part are formed through laser drilling, mechanical drilling or the like, and the through holes are electroplated to form conductive through holes, so that the corresponding first conductive elastic cantilever and the corresponding second conductive elastic cantilever are electrically connected through each conductive through hole.
The above-described electrical connector 100 has the following problems:
(1) Although the corresponding first conductive elastic cantilever and the second conductive elastic cantilever can be electrically connected by virtue of the plating layer in the conductive through hole, the electrical conduction of the connector is not facilitated due to the small cross section area of the plating layer and the high resistance value of the plating layer;
(2) Although the through holes can be electroplated to form the conductive through holes, when the through holes are electroplated, if the inner walls of the conductive through holes are not fully plated with the plating layers, the plating layers are disconnected, so that the corresponding first conductive elastic cantilever and the second conductive elastic cantilever cannot be electrically connected, the electrical reliability of the connector is low, in addition, after the through holes are electroplated, whether the whole inner walls of the conductive through holes are fully plated with the plating layers needs to be checked, the plating layers are positioned at the inner sides of the conductive through holes, the checking speed is lower, and more time is required to be spent;
(3) The conductive through hole is of a hollow structure, so that the heat conduction performance is poor, and the heat dissipation of the connector is not facilitated;
(4) After the first fixed end is fixed on the first adhesive layer and the second fixed end is fixed on the second adhesive layer, through holes penetrating through the first fixed end, the first adhesive layer, the dielectric layer, the second adhesive layer and the corresponding second fixed end are formed in a laser drilling or mechanical drilling mode, the through holes penetrate through each first fixed end, each first adhesive layer, each dielectric layer, each second adhesive layer and each corresponding second fixed end, and the first fixed end, the first adhesive layer, the second adhesive layer and the corresponding second fixed end are easy to damage, so that the first fixed end, the first adhesive layer, the second adhesive layer and the second fixed end are unstable, and the first fixed end and the first adhesive layer are unstable, and the second adhesive layer and the second fixed end are unstable.
Accordingly, there is a need for an improved electrical connector that overcomes the above-described problems.
[ invention ]
Aiming at the problems faced by the background technology, the invention aims to provide the electric connector with low resistance value, high electrical reliability and good heat dissipation effect, and the characteristic length of the minimum cross section of the solid conducting part in the up-down direction is more than 0.2mm, so that the electric connector with low resistance value, high electrical reliability and good heat dissipation effect is achieved.
In order to achieve the above purpose, the invention adopts the following technical means:
an electrical connector, comprising: the solid conducting parts are provided with an upper surface and a lower surface, and the characteristic length of the minimum cross section of the conducting parts in the up-down direction is more than 0.2mm; each conductive terminal is provided with a fixing part, the fixing part is abutted against the corresponding upper surface, a spring arm extends upwards from the fixing part, and the spring arm is used for being abutted against a first electronic element upwards; the contact pieces are respectively and correspondingly abutted against the lower surface and are used for electrically connecting a second electronic element positioned below the conducting part.
Further, the feature length of the minimum cross section of the conduction portion in the up-down direction is between 0.2mm and 1.0 mm.
Further, the method comprises the steps of: the carrier is provided with a plurality of accommodating spaces, the conducting part comprises a metal block, the accommodating spaces are filled with the metal block, and the accommodating spaces are located under the fixing parts.
Further, the conducting part comprises an upper conducting part, a middle part and a lower conducting part, the middle part is connected with the upper conducting part and the lower conducting part, the upper surface is located at the upper conducting part, the lower surface is located at the lower conducting part, the middle part is located in the accommodating space, the characteristic length of the minimum cross section of the middle part in the up-down direction is smaller than the length of the fixing part, the upper conducting part upwards exceeds the accommodating space, the length of the upper conducting part is larger than the characteristic length of the minimum cross section of the middle part in the up-down direction, the lower conducting part downwards exceeds the accommodating space, and the length of the lower conducting part is larger than the characteristic length of the minimum cross section of the middle part in the up-down direction.
Further, the fixing part and the upper surface are fixed by SMT welding or diffusion welding or ultrasonic welding or laser welding or resistance welding or Hotbar welding or using conductive adhesive.
Further, the conducting part comprises ACF conductive adhesive and a metal block, the upper surface is arranged on the ACF conductive adhesive, the ACF conductive adhesive is arranged between the fixing part and the metal block, pressure and temperature are applied to the ACF conductive adhesive, the fixing part and the metal block are electrically conducted, and the ACF conductive adhesive is connected with a plurality of metal blocks in the same row.
Further, each contact has a positioning portion, the positioning portion is abutted to the corresponding lower surface, an elastic portion extends downward from the positioning portion, the elastic portion is used for being abutted downward to the second electronic component, and the positioning portion is located right below the conducting portion.
Further, the conducting part is formed by a metal block and solder together, or the conducting part is formed by the metal block and conductive adhesive together, a first insulating film is adhered to two adjacent metal blocks arranged at intervals, the first insulating film is provided with a plurality of first accommodating spaces, each metal block is correspondingly exposed in each first accommodating space, the solder or the conductive adhesive is accommodated in the first accommodating space, and the fixing part is fixed on the metal block through the solder or the conductive adhesive.
A method of manufacturing an electrical connector, comprising: step 1: providing a metal plate, stamping or etching the metal plate to form a plurality of spaced metal blocks, or providing a plurality of metal columns or metal needles, wherein the metal columns or the metal needles form a plurality of spaced metal blocks, and the metal blocks are solid and have a characteristic length of a minimum cross section in the up-down direction of more than 0.2mm; step 2: forming a carrier on the plurality of metal blocks by injection molding; or providing a carrier, wherein the carrier forms a plurality of accommodating spaces, and a plurality of metal blocks are assembled in the accommodating spaces; step 3: providing a plurality of conductive terminals, wherein each conductive terminal comprises a fixing part and a spring arm extending upwards from the fixing part, the fixing part is arranged above the corresponding metal block and is fixed on the corresponding metal block, and the spring arm is used for upwards abutting against a first electronic element; step 4: and providing a plurality of contact pieces, placing the contact pieces under the corresponding metal blocks and fixing the contact pieces on the corresponding metal blocks, wherein the contact pieces are used for conducting and connecting a second electronic element.
Further, in step 3, the method for fixing the fixing portion and the metal block is SMT welding, diffusion welding, ultrasonic welding, laser welding, resistance welding, hotbar welding or fixing by using conductive adhesive; when the fixing part and the metal block are fixed by SMT welding or Hotbar welding or conductive adhesive, the conducting part is formed by the metal block and the solder or the conducting part is formed by the metal block and the conductive adhesive, and the characteristic length of the minimum cross section of the conducting part in the up-down direction is more than 0.2mm.
A method of manufacturing an electrical connector, comprising: step 1: providing a first insulating film with viscosity, forming a plurality of first accommodating spaces by the first insulating film, and adhering one surface of the top surface and the bottom surface of a metal plate to the first insulating film; step 2: stamping or etching the metal plate to form a plurality of spaced metal blocks, wherein the metal blocks are solid, the characteristic length of the minimum cross section in the up-down direction is larger than 0.2mm, the metal blocks are exposed in the corresponding first accommodating spaces, a gap is formed between two adjacent metal blocks, and the gap is covered by the first insulating film; step 3: providing a second insulating film with viscosity, forming a plurality of second accommodating spaces by the second insulating film, adhering the other surfaces of the top surface and the bottom surface of the metal plate to the second insulating film, exposing the metal block to the corresponding second accommodating space, and covering the gap by the second insulating film; step 4: providing a plurality of conductive terminals, wherein each conductive terminal comprises a fixing part and a spring arm extending upwards from the fixing part, the fixing part is arranged above the corresponding metal block and is fixed on the corresponding metal block, and the spring arm is used for upwards abutting against a first electronic element; step 5: and providing a plurality of contact pieces, placing the contact pieces under the corresponding metal blocks and fixing the contact pieces on the corresponding metal blocks, wherein the contact pieces are used for conducting and connecting a second electronic element.
Further, in step 4, the method for fixing the fixing portion and the metal block is SMT welding, diffusion welding, ultrasonic welding, laser welding, resistance welding, hotbar welding or fixing by using conductive adhesive; when the fixing part and the metal block are fixed by SMT welding or Hotbar welding or conductive adhesive, the solder or conductive adhesive is contained in the first containing space, the conducting part is formed by the metal block and the solder together or the conducting part is formed by the metal block and the conductive adhesive together, and the characteristic length of the minimum cross section of the conducting part in the up-down direction is more than 0.2mm.
Compared with the prior art, the invention has the following beneficial effects: the conducting part is solid, compared with a hollow conducting part (namely a conductive through hole) surrounded by a coating in the background art, the middle part of the solid conducting part is solid conductor material, the middle part of the hollow conducting part is air, and the heat conduction performance of the conductor material is better than that of the air, so that the solid conducting part has better heat dissipation effect than that of the hollow conducting part; in addition, the conducting part is solid, so that the situation that the electric conduction cannot be realized due to the fact that the inner wall of the through hole is not fully plated with the plating layer does not occur, the electric reliability of the electric connector is high, and whether the conducting part is solid can be seen at one glance, and compared with the process of checking the plating layer on the inner wall of the through hole, the time is saved, so that the production cost is reduced;
the minimum cross section of the conducting part in the up-down direction has a characteristic length larger than 0.2mm, and as known from a resistance calculation formula r=ρ×l/a (ρ is the resistivity of the resistive material, L is the length of the resistive body, and a is the cross section of the resistive body), the resistance R is inversely proportional to the cross section a, and the larger the cross section a of the conducting part is, the smaller the resistance R of the conducting part is, thereby improving the electrical reliability.
The fixing part is abutted against the corresponding upper surface, that is to say, the fixing part is in direct electrical contact with the upper surface, after a through hole is formed in a laser drilling mode or a mechanical drilling mode in the prior art, a bonding pad is additionally manufactured on the through hole, the fixing part is in electrical contact with the bonding pad, and compared with the process of additionally manufacturing the bonding pad, the upper surface can be directly used as a welding part without being additionally used as the bonding pad, the process is simple, the production cost is low, in addition, the resistance of the connecting part between the bonding pad and the conducting part is high, the contact impedance is increased, the electrical conduction of the electrical connector is not facilitated, the upper surface can be directly used as the welding part, the contact impedance is reduced, and the electrical conduction of the electrical connector is facilitated.
[ description of the drawings ]
Fig. 1 is a schematic view of a conductive terminal and a contact of a first embodiment of an electrical connector of the present invention fixed to a metal block;
FIG. 2 is a schematic view of an upper pad and a lower pad of a second embodiment of an electrical connector of the present invention fixed to a metal block;
fig. 3 is a schematic view of a conductive terminal and a contact of a second embodiment of an electrical connector of the present invention being fixed to an upper pad and a lower pad, respectively;
fig. 4 is a schematic view of a first insulating film and a second insulating film of a third embodiment of an electrical connector according to the present invention, which form a first accommodating space and a second accommodating space respectively;
FIG. 5 is a schematic illustration of a metal block of a third embodiment of an electrical connector of the present invention bonded between a first insulating film and the second insulating film;
fig. 6 is a schematic view of a conductive terminal and a contact of a third embodiment of an electrical connector of the present invention fixed to a conductive portion;
fig. 7 is a schematic view of a protective insulator of a third embodiment of the electrical connector of the present invention covering a surface of a fixing portion and a surface of a positioning portion;
reference numerals of the specific embodiments illustrate:
| electric connector 100 | Carrier 1 | Accommodation space 13 |
| First accommodation space 131 | Second accommodation space 132 | Conduction part 2 |
| Upper conductive part 21 | Intermediate portion 22 | Lower conduction part 23 |
| Conductive terminal 3 | Fixing portion 31 | Spring arm 32 |
| Contact 4 | Positioning portion 41 | Elastic portion 42 |
| First insulating film 5 | Second insulating film 6 | Protective insulator 7 |
| Upper surface S1 | Lower surface S2 |
[ detailed description ] of the invention
For a better understanding of the invention with objects, structures, features, and effects, the invention will be described further with reference to the drawings and to the detailed description.
As shown in fig. 1, the electrical connector 100 of the present invention defines an up-down direction (a direction in which the conductive terminals 3 are assembled to the conductive portions 2).
Fig. 1 is a first embodiment of an electrical connector 100 according to the present invention, which includes a carrier 1, wherein the carrier 1 is provided with a plurality of accommodating spaces 13; the plurality of separated conducting parts 2 are respectively accommodated in the plurality of accommodating spaces 13; a plurality of conductive terminals 3 fixed on the conductive portion 2 for abutting a first electronic component (not shown) above the conductive portion 2; the contacts 4 are respectively and correspondingly fixed on the conductive portions 2 for electrically connecting a second electronic component (not shown) located below the conductive portions 2.
As shown in fig. 1, the via 2 is solid, which does not include, for example, the case in the background art, that is, the case where a conductive layer is formed only on the inner wall of a conductive via, while the middle of the conductive via remains hollow; the conducting portion 2 is provided with an upper surface S1 and a lower surface S2, the conductive terminal 3 is abutted against the corresponding upper surface S1, and the contact 4 is abutted against the lower surface S2. In this embodiment, each of the conductive portions 2 may include a metal block 2, where the metal blocks 2 are solid and spaced apart, and the metal block 2 has a low resistance, good heat dissipation, and high electrical reliability compared to the conductive portion 2 which is not solid; the metal block 2 fills the accommodating space 13, the accommodating space 13 is positioned right below the conductive terminal 3, and the accommodating space 13 is positioned right above the contact 4; because the metal block 2 is solid, the conductive terminal 3 may be directly fixed on the upper surface S1, and the contact 4 may be directly fixed on the lower surface S2, without further making a pad, that is, without fixing a pad on the upper surface S1 and the lower surface S2, the conductive terminal 3 and the contact 4 are respectively fixed on the pad, so that the process is reduced, the cost is saved, and if the pad is used as an intermediary, the contact impedance is increased, which is unfavorable for the electrical conduction of the electrical connector 100, and the conductive terminal 3 and the contact 4 are directly fixed on the metal block, which reduces the contact impedance and is favorable for the electrical conduction of the electrical connector 100. The carrier 1 is provided with a plurality of the receiving spaces 13, and the receiving spaces 13 may be formed by injection molding on the metal block 2, or may be formed by laser drilling or punching on the carrier 1.
Each conductive terminal 3 has a fixing portion 31, the accommodating space 13 is located directly below the fixing portion 31, the fixing portion 31 abuts against the corresponding upper surface S1, a spring arm 32 extends upward from the fixing portion 31, the spring arm 32 is used for abutting against the first electronic component upward, each contact 4 has a positioning portion 41, the accommodating space 13 is located directly above the positioning portion 41, the positioning portion 41 abuts against the corresponding lower surface S2, an elastic portion 42 extends downward from the positioning portion 41, the elastic portion 42 is used for abutting against the second electronic component downward, and the positioning portion 41 is located directly below the conducting portion 2.
The fixing portion 31 and the upper surface S1 may be fixed by SMT welding, diffusion welding, ultrasonic welding, laser welding, resistance welding, hotbar welding, or using conductive adhesive. When the method of fixing the fixing portion 31 to the metal block 2 is diffusion welding, ultrasonic welding, laser welding, or resistance welding, the conducting portion 2 is only the metal block 2; when the fixing method of the fixing portion 31 and the metal block 2 is SMT soldering or Hotbar soldering, the conducting portion 2 is formed by the metal block 2 and solder (not shown); when the fixing portion 31 and the metal block 2 are fixed by using conductive adhesive, the conducting portion 2 is formed by the metal block 2 and conductive adhesive (not shown), and the fixing portion 31 and the metal block 2 are simple to fix and operate; similarly, the positioning portion 41 and the lower surface S2 may be fixed by the same method.
The conductive adhesive may be an ACF conductive adhesive, and when the conductive adhesive is the ACF conductive adhesive, the conducting portion 2 includes the ACF conductive adhesive and the metal block 2, the upper surface S1 is disposed on the ACF conductive adhesive, and the ACF conductive adhesive is disposed between the fixing portion 31 and the metal block 2. The ACF conductive adhesive mainly comprises a resin adhesive and conductive particles, the conductive particles are uniformly distributed and are not contacted with each other before being subjected to hot pressing, and a layer of insulating film is arranged on the ACF conductive adhesive, so that the ACF conductive adhesive is nonconductive, a certain pressure and a certain temperature are applied to the ACF conductive adhesive, specifically, the pressure of 60Mpa to 80Mpa and the temperature of 190 ℃ to 200 ℃ can be applied for 5 seconds, the insulating layer is broken at the pressure contact surface after being subjected to hot pressing, and the adhesive tape between the fixing part 31 and the metal block 2 is cured and conducted under pressure, namely, the fixing part 31 and the metal block 2 are electrically conducted. Because the validity period of the ACF conductive adhesive is short, the ACF conductive adhesive can be in a belt shape and simultaneously connected with a plurality of metal blocks 2 positioned in the same row, thereby being beneficial to improving the efficiency and ensuring the validity of the ACF conductive adhesive. Since the ACF conductive paste between two adjacent conductive terminals 3 is not subjected to hot pressing, i.e., the ACF conductive paste between a plurality of the metal blocks is not subjected to hot pressing, the insulating layer between two adjacent conductive terminals 3 is not broken, i.e., the insulation between two adjacent conductive terminals 3 is maintained, and thus, electrical conduction between two adjacent conductive terminals 3 is not achieved, and short circuit between two adjacent conductive terminals 3 is avoided.
The minimum cross section of the conducting part 2 in the up-down direction has a characteristic length (Characteristic length) of greater than 0.2mm, which is a physical dimension defining the physical system, and which generally appears in some formulas to express some dimensional characteristics of the system. In this embodiment, when the method of fixing the fixing portion 31 to the metal block 2 is diffusion welding, ultrasonic welding, laser welding, or resistance welding, since the conducting portion 2 is the metal block 2, that is, the minimum cross-sectional feature length of the metal block 2 in the up-down direction is greater than 0.2mm, the metal block 2 is large enough to enable the fixing portion 31 to be directly fixed to the upper surface S1 without further bonding pads, and optimally, the minimum cross-sectional feature length of the metal block 2 in the up-down direction is between 0.2mm and 1.0mm, if the minimum cross-sectional feature length of the metal block 2 in the up-down direction is greater than 1.0mm, the adjacent two conductive terminals 3 are easily contacted and short-circuited, or the solder flow can short-circuit the adjacent two conductive terminals 3, and if the minimum cross-sectional feature length of the metal block 2 in the up-down direction is less than 0.2mm, the weak strength between the metal block 2 and the fixing portion 31 leads to unstable welding of the conductive terminals 3; the fixing portion 31 and the accommodating space 13 are located on the same axis, so that the signal transmission distance is shorter; when the fixing portion 31 is fixed to the metal block 2 by SMT welding or Hotbar welding or using conductive paste, since the conductive portion 2 includes the metal block 2 and the solder or the conductive portion 2 includes the metal block 2 and the conductive paste, the minimum cross-sectional feature length of the metal block 2 and the solder in the up-down direction is greater than 0.2mm or the minimum cross-sectional feature length of the metal block 2 and the conductive paste in the up-down direction is greater than 0.2mm, and as such, the minimum cross-sectional feature length of the metal block 2 and the solder or the metal block 2 and the conductive paste in the up-down direction is sufficient to enable the fixing portion 31 to be directly fixed to the upper surface S1 without additionally making a pad, and optimally, the minimum cross-sectional feature length of the metal block 2 and the solder or the metal block 2 and the conductive paste in the up-down direction is between 0.2mm and 1.0 mm.
In the assembly application of the electrical connector 100 of the present invention, a metal plate (not shown) is provided, and the metal plate is stamped or etched to form a plurality of spaced apart metal blocks 2; subsequently, the carrier 1 is molded on the plurality of metal blocks 2 by injection molding; then providing a plurality of conductive terminals 3, placing the fixing portion 31 above the corresponding metal block 2 and fixing the fixing portion to the corresponding metal block 2, wherein the spring arm 32 is used for abutting the first electronic component upwards; finally, a plurality of the contacts 4 are provided, the contacts 4 are disposed below the corresponding metal blocks 2 and fixed to the corresponding metal blocks 2, and the elastic portions 42 are used for guiding the second electronic components downwards. Of course, a plurality of metal posts or metal pins may be provided to form a plurality of spaced metal blocks 2, and a carrier 1 may be provided, wherein a plurality of receiving spaces 13 are formed in the carrier 1 by laser drilling or punching, and the plurality of metal blocks 2 are assembled in the receiving spaces 13, respectively.
Fig. 2 and 3 show a second embodiment of the electrical connector 100 according to the present invention.
The main difference between this embodiment and the first embodiment is that: the conducting portion 2 further comprises an upper conducting portion 21, an intermediate portion 22 and a lower conducting portion 23, wherein the intermediate portion 22 connects the upper conducting portion 21 and the lower conducting portion 23, the intermediate portion 22 is the metal block 22, the upper conducting portion 21 is an upper bonding pad 21, the lower conducting portion 23 is a lower bonding pad 23, the upper bonding pad 21 and the lower bonding pad 23 are fixed on the metal block 22, the upper surface S1 is located on the upper bonding pad 21, the lower surface S2 is located on the lower bonding pad 23, the metal block 22 is located in the accommodating space 13, the minimum cross section characteristic length of the metal block 22 in the up-down direction is smaller than the length of the fixing portion 31, the upper bonding pad 21 exceeds the accommodating space 13 upwards, the length of the upper bonding pad 21 is larger than the minimum cross section characteristic length of the metal block 22 in the up-down direction, the lower bonding pad 23 exceeds the accommodating space 13 downwards, and the length of the lower bonding pad 23 is larger than the minimum cross section characteristic length of the metal block 22 in the up-down direction.
Compared with the first embodiment, in the second embodiment, since the characteristic length of the minimum cross section of the metal block 22 in the up-down direction is smaller than the length of the fixing portion 31, if the conductive terminal 3 is directly welded to the metal block 22, the welding strength is weak, the length of the upper bonding pad 21 is larger than the characteristic length of the minimum cross section of the metal block 22 in the up-down direction, the lower bonding pad 23 is protruded downward from the accommodating space 13, and the length of the lower bonding pad 23 is larger than the characteristic length of the minimum cross section of the metal block 22 in the up-down direction, and the length of the welding place of the fixing portion 31 is increased, so that the welding strength is increased, and the fixing of the conductive terminal 3 is more stable. In addition, since the lengths of the upper bonding pad 21 and the lower bonding pad 23 are both greater than the characteristic length of the smallest cross section of the metal block 22 in the up-down direction, the upper bonding pad 21 and the lower bonding pad 23 can play a role in limiting, and the metal block 22 is limited to be separated from the accommodating space 13 upwards or downwards. The rest of the structure of this embodiment is substantially the same as that of the first embodiment, and will not be described here again.
In the assembly application of the electrical connector 100 of the present invention, the forming method and the assembling method of the metal block 22 and the carrier 1 are detailed in the first embodiment, and different from the first embodiment, the upper bonding pad 21 and the lower bonding pad 23 are provided after the metal block is formed, and the upper bonding pad 21 and the lower bonding pad 23 are respectively fixed above and below the metal block 22; then, providing a plurality of conductive terminals 3, placing the fixing portion 31 above the upper bonding pad 21 and fixing the fixing portion to the corresponding upper bonding pad 21, and making the spring arm 32 contact the first electronic component upwards; finally, a plurality of the contacts 4 are provided, the contacts 4 are placed under the corresponding lower pads 23 and fixed to the corresponding lower pads 23, and the contacts 4 are used for guiding and connecting the second electronic component.
Fig. 4 to 7 show a third embodiment of the electrical connector 100 according to the present invention.
The main difference between this embodiment and the second embodiment is that: as shown in fig. 5, the conducting portion 2 is formed by punching or etching a metal plate 2 to form a plurality of spaced metal blocks 2, the metal blocks 2 are solid, the feature length of the smallest cross section in the up-down direction is greater than 0.2mm, a gap (not numbered) is provided between two adjacent metal blocks 2, the gap is covered by the first insulating film 5, that is, the first insulating film 5 is adhered to two adjacent metal blocks 2 arranged at intervals, the first insulating film 5 may be PI film, the first insulating film 5 has a plurality of first accommodating spaces 131, the first accommodating spaces 131 are formed by laser punching or punching on the first insulating film 5, and each metal block 2 is correspondingly exposed to each first accommodating space 131. When the method for fixing the fixing portion 31 and the metal block 2 is SMT welding or Hotbar welding, the fixing portion 31 is fixed on the metal block 2 by solder, the solder is contained in the first containing space 131, and the metal block 2 and the solder together form the conducting portion 2; when the fixing portion 31 and the metal block 2 are fixed by using conductive adhesive, the fixing portion 31 is fixed to the metal block 2 by using conductive adhesive, the conductive adhesive is contained in the first containing space 131, the metal block 2 and the conductive adhesive together form the conducting portion 2, and a characteristic length of a minimum cross section of the conducting portion 2 in an up-down direction is greater than 0.2mm.
Similarly, a second insulating film 6 is provided, the second insulating film 6 may also be PI film, the second insulating film 6 may also form a plurality of second accommodating spaces 132 by laser drilling or punching, the other surface of the metal block 2 is adhered to the second insulating film 6, the metal block 2 is exposed in the corresponding second accommodating space 132, and the second insulating film 6 covers the gap.
In addition, a protective insulator 7 may be coated on the surface of the fixing portion 31 and the surface of the positioning portion 41, the protective insulator 7 may be PI film, the protective insulator 7 may protect the fixing portion 31 and the positioning portion 41 from the environment such as humidity and high temperature, and the protective insulator 7 may further fix the fixing portion 31 and the positioning portion 41.
Compared with the second embodiment, in the third embodiment, because the metal blocks 2 are connected by the PI glue, compared with the case that the metal blocks 2 are connected by the carrier 1, the thickness of the electrical connector 100 in the up-down direction is smaller, which is beneficial to realizing ultra-thinning, and the PI glue can be covered above the fixing portion 31, which not only can play a role in protection, but also can realize a role in strengthening and fixing. The rest of the structure of this embodiment is substantially the same as that of the second embodiment, and will not be described here again.
In the assembly application of the electrical connector 100 of the present invention, firstly, the first insulating film 5 with viscosity is provided, the first insulating film 5 is formed into a plurality of first accommodating spaces 131 by means of laser drilling or punching, and one of the top surface and the bottom surface of the metal plate 2 is adhered to the first insulating film 5; then, the metal plate 2 is punched or etched to form a plurality of spaced metal blocks 2, the metal blocks are exposed in the corresponding first accommodating spaces 131, the gaps are arranged between two adjacent metal blocks, and the gaps are covered by the first insulating films 5; next, providing the second insulating film 6 with viscosity, forming a plurality of second accommodating spaces 132 by the second insulating film 6 through a laser drilling or punching mode, adhering the other surfaces of the top surface and the bottom surface of the metal plate 2 to the second insulating film 6, exposing the metal block 2 to the corresponding second accommodating spaces 132, and covering the gaps by the second insulating film 6; next, providing a plurality of conductive terminals 3, placing the fixing portion 31 above the corresponding metal block 2 and fixing the fixing portion to the corresponding metal block 2, wherein the spring arm 32 is used for abutting the first electronic component upwards; finally, a plurality of contacts 4 are provided, the contacts 4 are arranged below the corresponding metal blocks 2 and fixed to the corresponding metal blocks 2, and the contacts 4 are used for conducting and connecting the second electronic components; further, the protective insulator 7 may be provided to cover the surface of the fixing portion 31 and the surface of the positioning portion 41.
The electrical connector 100 of the present invention has the following advantageous effects:
(1) Because the conducting part 2 is solid, compared with the conducting part 2 which is hollow, the solid conducting part 2 has low resistance value, good heat dissipation and high electrical reliability, and as whether the conducting part is solid or not can be seen at a glance, compared with the way of realizing electrical conduction by electroplating the coating on the inner wall of the through hole, the method does not need to check whether the coating is fully plated on the inner wall of the through hole, thereby saving time and reducing the production cost; in addition, the conductive terminal 3 can be directly fixed on the conductive portion 2, and no additional bonding pad is needed, so that the process is reduced, the cost is saved, and compared with the use of the bonding pad as an intermediary between the conductive portion 2 and the fixing portion 31 or between the conductive portion 2 and the positioning portion 41, the fixing portion 31 and the positioning portion 41 are directly fixed on the metal block, the contact resistance is reduced, and the electrical conduction of the electrical connector 100 is facilitated;
(2) The feature length of the minimum cross section of the conducting part 2 in the up-down direction is between 0.2mm and 1.0mm, and the feature length of the minimum cross section of the conducting part 2 in the up-down direction is larger than 0.2mm, namely the length of the conducting part 2 is enough, so that even if no bonding pad is additionally manufactured, the conducting terminal 3 is directly fixed with the conducting part 2 and still stable, the sectional area of the conducting part 2 is increased, the resistance of the conducting part 2 is reduced, and the electrical reliability is improved; because the feature length of the minimum cross section of the conducting part 2 in the up-down direction is smaller than 1.0mm, the conducting terminals 3 are not easy to contact, and short circuit is not generated;
(3) The PI film is used for connecting the metal blocks 2, and compared with the connection between the metal blocks 2 by the carrier 1, the thickness of the PI film in the up-down direction is smaller than that of the carrier 1 in the up-down direction, so that the connector is beneficial to realizing ultra-thin;
(4) By covering the PI glue on the surfaces of the fixing portion 31 and the positioning portion 41, the PI glue can protect the fixing portion 31 and the positioning portion 41 from the severe environment such as external high temperature and humidity, and can further fix the fixing portion 31 and the positioning portion 41.
The following detailed description is of the preferred embodiments of the invention and is not intended to limit the scope of the invention, as all changes that come within the meaning and range of equivalency of the specification and drawings are intended to be embraced therein.
Claims (12)
1. An electrical connector, comprising:
the solid conducting parts are provided with an upper surface and a lower surface, and the characteristic length of the minimum cross section of the conducting parts in the up-down direction is more than 0.2mm;
each conductive terminal is provided with a fixing part, the fixing part is abutted against the corresponding upper surface, a spring arm extends upwards from the fixing part, and the spring arm is used for being abutted against a first electronic element upwards;
the contact pieces are respectively and correspondingly abutted against the lower surface and are used for electrically connecting a second electronic element positioned below the conducting part.
2. The electrical connector of claim 1, wherein: the minimum cross section of the conducting part in the up-down direction has a characteristic length of between 0.2mm and 1.0 mm.
3. The electrical connector of claim 1, comprising: the carrier is provided with a plurality of accommodating spaces, the conducting part comprises a metal block, the accommodating spaces are filled with the metal block, and the accommodating spaces are located under the fixing parts.
4. The electrical connector of claim 3, wherein: the conducting part comprises an upper conducting part, a middle part and a lower conducting part, wherein the middle part is connected with the upper conducting part and the lower conducting part, the upper surface is positioned at the upper conducting part, the lower surface is positioned at the lower conducting part, the middle part is positioned in the accommodating space, the characteristic length of the minimum cross section of the middle part in the up-down direction is smaller than the length of the fixing part, the upper conducting part upwards exceeds the accommodating space, the length of the upper conducting part is larger than the characteristic length of the minimum cross section of the middle part in the up-down direction, the lower conducting part downwards exceeds the accommodating space, and the length of the lower conducting part is larger than the characteristic length of the minimum cross section of the middle part in the up-down direction.
5. The electrical connector of claim 1, wherein: the fixing part and the upper surface are fixed through SMT welding, diffusion welding, ultrasonic welding, laser welding, resistance welding, hotbar welding or conductive adhesive.
6. The electrical connector of claim 1, wherein: the conducting part comprises ACF conductive adhesive and a metal block, the upper surface of the conducting part is arranged on the ACF conductive adhesive, the ACF conductive adhesive is arranged between the fixing part and the metal block, pressure and temperature are applied to the ACF conductive adhesive, the fixing part and the metal block are electrically conducted, and the ACF conductive adhesive is connected with a plurality of metal blocks positioned in the same row.
7. The electrical connector of claim 1, wherein: each contact piece is provided with a positioning part, the positioning part is abutted against the corresponding lower surface, an elastic part downwards extends from the positioning part, the elastic part is used for downwards abutting against the second electronic element, and the positioning part is positioned under the conducting part.
8. The electrical connector of claim 1, wherein: the conducting part is formed by a metal block and welding flux together, or the conducting part is formed by the metal block and conductive adhesive together, a first insulating film is adhered to two adjacent metal blocks arranged at intervals, the first insulating film is provided with a plurality of first accommodating spaces, each metal block is correspondingly exposed in each first accommodating space, welding flux or conductive adhesive is accommodated in the first accommodating space, and the fixing part is fixed on the metal block through welding flux or conductive adhesive.
9. A method of manufacturing an electrical connector, comprising:
step 1: providing a metal plate, stamping or etching the metal plate to form a plurality of spaced metal blocks, or providing a plurality of metal columns or metal needles, wherein the metal columns or the metal needles form a plurality of spaced metal blocks, and the metal blocks are solid and have a characteristic length of a minimum cross section in the up-down direction of more than 0.2mm;
step 2: forming a carrier on the plurality of metal blocks by injection molding; or providing a carrier, wherein the carrier forms a plurality of accommodating spaces, and a plurality of metal blocks are assembled in the accommodating spaces;
step 3: providing a plurality of conductive terminals, wherein each conductive terminal comprises a fixing part and a spring arm extending upwards from the fixing part, the fixing part is arranged above the corresponding metal block and is fixed on the corresponding metal block, and the spring arm is used for upwards abutting against a first electronic element;
step 4: and providing a plurality of contact pieces, placing the contact pieces under the corresponding metal blocks and fixing the contact pieces on the corresponding metal blocks, wherein the contact pieces are used for conducting and connecting a second electronic element.
10. The method of manufacturing an electrical connector of claim 9, wherein: in the step 3, the fixing part and the metal block are fixed by SMT welding, diffusion welding, ultrasonic welding, laser welding, resistance welding, hotbar welding or conductive adhesive; when the fixing part and the metal block are fixed by SMT welding or Hotbar welding or conductive adhesive, the conducting part is formed by the metal block and the solder or the conducting part is formed by the metal block and the conductive adhesive, and the characteristic length of the minimum cross section of the conducting part in the up-down direction is more than 0.2mm.
11. A method of manufacturing an electrical connector, comprising:
step 1: providing a first insulating film with viscosity, forming a plurality of first accommodating spaces by the first insulating film, and adhering one surface of the top surface and the bottom surface of a metal plate to the first insulating film;
step 2: stamping or etching the metal plate to form a plurality of spaced metal blocks, wherein the metal blocks are solid, the characteristic length of the minimum cross section in the up-down direction is larger than 0.2mm, the metal blocks are exposed in the corresponding first accommodating spaces, a gap is formed between two adjacent metal blocks, and the gap is covered by the first insulating film;
step 3: providing a second insulating film with viscosity, forming a plurality of second accommodating spaces by the second insulating film, adhering the other surfaces of the top surface and the bottom surface of the metal plate to the second insulating film, exposing the metal block to the corresponding second accommodating space, and covering the gap by the second insulating film;
step 4: providing a plurality of conductive terminals, wherein each conductive terminal comprises a fixing part and a spring arm extending upwards from the fixing part, the fixing part is arranged above the corresponding metal block and is fixed on the corresponding metal block, and the spring arm is used for upwards abutting against a first electronic element;
step 5: and providing a plurality of contact pieces, placing the contact pieces under the corresponding metal blocks and fixing the contact pieces on the corresponding metal blocks, wherein the contact pieces are used for conducting and connecting a second electronic element.
12. The method of manufacturing an electrical connector of claim 11, wherein: in the step 4, the fixing part and the metal block are fixed by SMT welding, diffusion welding, ultrasonic welding, laser welding, resistance welding, hotbar welding or conductive adhesive; when the fixing part and the metal block are fixed by SMT welding or Hotbar welding or conductive adhesive, the solder or conductive adhesive is contained in the first containing space, the conducting part is formed by the metal block and the solder together or the conducting part is formed by the metal block and the conductive adhesive together, and the characteristic length of the minimum cross section of the conducting part in the up-down direction is more than 0.2mm.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210172219.4A CN114614287B (en) | 2022-02-24 | 2022-02-24 | Electric connector and manufacturing method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210172219.4A CN114614287B (en) | 2022-02-24 | 2022-02-24 | Electric connector and manufacturing method thereof |
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| CN114614287A CN114614287A (en) | 2022-06-10 |
| CN114614287B true CN114614287B (en) | 2024-04-16 |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201663277U (en) * | 2010-03-26 | 2010-12-01 | 易登电子科技(昆山)有限公司 | Power supply connector female seat |
| CN109361094A (en) * | 2018-01-09 | 2019-02-19 | 番禺得意精密电子工业有限公司 | Electric connector |
| TWM606894U (en) * | 2020-02-17 | 2021-01-21 | 嘉澤端子工業股份有限公司 | Electrical connector |
-
2022
- 2022-02-24 CN CN202210172219.4A patent/CN114614287B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201663277U (en) * | 2010-03-26 | 2010-12-01 | 易登电子科技(昆山)有限公司 | Power supply connector female seat |
| CN109361094A (en) * | 2018-01-09 | 2019-02-19 | 番禺得意精密电子工业有限公司 | Electric connector |
| TWM606894U (en) * | 2020-02-17 | 2021-01-21 | 嘉澤端子工業股份有限公司 | Electrical connector |
| CN212412337U (en) * | 2020-02-17 | 2021-01-26 | 番禺得意精密电子工业有限公司 | Electrical connector |
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| CN114614287A (en) | 2022-06-10 |
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