CN112563786A - Ultra-micro rectangular electric connector and manufacturing method thereof - Google Patents

Ultra-micro rectangular electric connector and manufacturing method thereof Download PDF

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Publication number
CN112563786A
CN112563786A CN202011498695.2A CN202011498695A CN112563786A CN 112563786 A CN112563786 A CN 112563786A CN 202011498695 A CN202011498695 A CN 202011498695A CN 112563786 A CN112563786 A CN 112563786A
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CN
China
Prior art keywords
furnace
temperature
shell
sintered body
electrical connector
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Pending
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CN202011498695.2A
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Chinese (zh)
Inventor
杨阳
山胜利
郭冬梅
邢雷
刘思嫄
赵康喆
张博
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Shaanxi Huada Science Technology Co Ltd
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Shaanxi Huada Science Technology Co Ltd
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Priority to CN202011498695.2A priority Critical patent/CN112563786A/en
Publication of CN112563786A publication Critical patent/CN112563786A/en
Pending legal-status Critical Current

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    • 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
    • H01R13/03—Contact members characterised by the material, e.g. plating, or coating materials
    • 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
    • H01R13/40—Securing contact members in or to a base or case; Insulating of contact members
    • H01R13/405—Securing in non-demountable manner, e.g. moulding, riveting
    • 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
    • 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
    • H01R13/516—Means for holding or embracing insulating body, e.g. casing, hoods
    • 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
    • H01R43/16—Apparatus or processes specially adapted for manufacturing, assembling, maintaining, or repairing of line connectors or current collectors or for joining electric conductors for manufacturing contact members, e.g. by punching and by bending
    • 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
    • H01R43/24—Assembling by moulding on contact members

Abstract

The invention discloses an ultra-micro rectangular electric connector and a manufacturing method thereof, belonging to the technical field of communicationThe glass base is of a hollow structure with trapezoidal steps, a plurality of jack contacts are arranged on the glass base in a double-arrangement mode, and the glass base is formed by sintering glass slurry. Compared with the prior structure, the invention adopts the glass slurry filling and sintering process, fully utilizes the characteristics of stronger fluidity and low sintering temperature of the glass slurry, can obviously reduce the row pitch of the connector, adopts the shell and the jack contact element material as the alloy material, and is sintered with the glass DM308 into a whole, and the formed leakage rate is not more than 1.01 multiplied by 10‑3Pa•cm3The interface of/S is sealed.

Description

Ultra-micro rectangular electric connector and manufacturing method thereof
Technical Field
The invention belongs to the technical field of communication, and particularly relates to an ultra-micro rectangular electric connector and a manufacturing method thereof.
Background
The electrical connector not only needs to meet general performance requirements, but also has the important requirements that the electrical connector has good contact, reliable operation and convenient maintenance, and whether the reliable operation directly affects the normal operation of a circuit or not, and relates to the safety of the whole host. For this reason, the host circuit has very strict requirements on the quality and reliability of the electrical connector, and because of the high quality and reliability of the electrical connector, the electrical connector is also widely used in military systems such as aviation, aerospace, national defense and the like.
The existing common airtight ultramicro rectangular electric connector has the technical defects that the distance is 0.635mm, the row spacing is 1.02mm, the rated current is 1A, the medium withstand voltage is 250V, the mechanical life is 200 times, and the electric connector has the following characteristics: 1) the contact pitch in the prior art is small (only 0.635 mm), so that the connector performance is not high, the rated current is only 1A, the dielectric withstand voltage is only 250V, and the mechanical life is only 200 times. Meanwhile, the pin diameter of the contact element is thin, only phi is 0.25mm, the side surface of the pin cannot be machined into a grinding surface, and the pin can only be arranged on the end surface (the area is 0.049 mm)2) And carrying out gold wire bonding. 2) The large pitch of the prior art contacts (1.02 mm) results in a large connector volume, for example, with a 37-core, length dimension of 18.41mm, width dimension of 3.81mm, and height dimension of 5.7 mm. 3) The prior art uses a glass sintering process to bond the metal housing to the contactThe piece and the glass blank are sealed, the glass blank needs to be processed and molded before sintering, the space and the row spacing of the connector are too small to be realized by adopting a glass sintering process, and therefore, the row spacing of the connector in the prior art is larger.
Disclosure of Invention
Aiming at the technical problems, the invention provides an ultra-micro rectangular electric connector and a manufacturing method thereof, wherein a glass slurry filling and sintering process is adopted, the characteristics of strong fluidity and low sintering temperature of the glass slurry are fully utilized, the row pitch of the connector can be obviously reduced, the shell and the jack contact element are made of alloy materials and are sintered with glass DM308 into a whole, and the formed leakage rate is not more than 1.01 multiplied by 10-3Pa•cm3The interface of/S is sealed.
The invention solves the problems through the following technical means:
a submicro-rectangular electrical connector comprising a housing, a glass base and a plurality of receptacle contacts, wherein: the outer part of the shell is of a stepped rectangular structure, and the inner part of the shell is of a trapezoidal stepped hollow structure; the jack contacts are arranged on the glass base in a double-arrangement manner, the distance between every two rows of jack contacts is 0.74-0.76mm, and the row distance between two rows of jack contacts is 0.64-0.66 mm.
Preferably, the socket contact consists of an upper cylinder and a lower cylinder, the bottom of the lower cylinder is provided with a plane for bonding gold wires, the diameter of the upper cylinder is 0.54-0.56mm, the diameter of the lower cylinder is 0.34-0.36 mm, and the area of the plane is at least 0.158mm2。
Preferably, the lower cylinders of the front and rear adjacent receptacle contacts are different in length, wherein: the height difference between the adjacent lower cylinders is 1.1-1.4 mm.
Preferably, the number of the jack contacts is 37, the 37 jack contacts are arranged in two rows, the first row is provided with 18 jack contacts at equal intervals, and the second row is provided with 19 jack contacts at equal intervals.
Preferably, the length of the shell is 16.3-16.5mm, the width of the shell is 3.4-3.6mm, and the height of the shell is 4.4-4.6 mm.
Preferably, the socket contact is made of kovar alloy 4J29 material, and the surface of the socket contact is plated with gold with the purity of 99.99%.
Preferably, the shell is made of kovar alloy 4J29 material, and the surface of the shell is plated with gold with the purity of 99.99%.
Preferably, the glass base is formed by sintering DM308 glass slurry.
The manufacturing method of the ultramicro rectangular electric connector is characterized by comprising the following process steps:
1) soaking the shell and the jack contact piece in deionized water for 2-3h, then placing the shell and the jack contact piece in a filtering container, washing with deionized water, and dehydrating with absolute alcohol;
2) placing the shell and the jack contact element into a vacuum furnace, heating the furnace to 900--2-7.1×10-2Pa, purifying the surfaces of the shell and the jack contact element;
3) placing the shell and the jack contact element into an oxidation furnace, heating the furnace to 650-750 ℃, keeping the temperature for 10-12min, taking out the shell and the jack contact element, and air-cooling to room temperature;
4) the graphite mould cleaned by the absolute alcohol is put into a vacuum furnace, the furnace temperature is increased to 900-1100 ℃, the heat preservation time is 30-40min, and the vacuum degree in the vacuum furnace is 6.9 multiplied by 10-2-7.1×10-2Pa, purifying the surface of the graphite mold;
5) cleaning the purified graphite mold by using a high-pressure dust blowing gun, loading the shell into the graphite mold, and then loading the jack contact piece into a positioning hole of the graphite mold;
6) injecting the glass slurry into a graphite mold in a vacuum glove box, placing the molded connector into a vacuum furnace, and filling the furnace with 3.9 × 10 glass slurry5-4.1×105High purity nitrogen gas with vacuum degree of 6.9X 10-2-7.1×10-2Pa, raising the temperature of the furnace to 390-410 ℃, keeping the temperature for 18-22h, cooling in the furnace and taking out;
7) and fixing the sintered body on a positioning tool, mounting the tool fixed with the sintered body on a high-precision grinding machine provided with a 100-mesh grinding wheel, grinding and processing a bonding surface, and performing an electroplating process after ensuring that the roughness of the bonding surface reaches at least 9 levels.
Preferably, the electroplating process comprises the following process steps:
1) boiling the sintered body in deoiling solution, removing oil with ultrasonic wave for 1-3min, cleaning with deionized water for 10-15min, and ultrasonic water washing for 20-40 min;
2) weakly corroding the sintered body for 1-5min, keeping the temperature at 30-50 ℃, washing with deionized water for 10-15min after corrosion, and ultrasonically washing for 20-40 min;
3) putting the sintered body into a nickel plating bath, keeping the temperature at 87-93 ℃, the pH at 4.4-4.8, keeping the duration for 10-15min, washing with deionized water for 10-15min after plating, and performing ultrasonic activation for 3-5 min;
4) pre-plating the sintered body in a gold plating bath with soft gold with a purity of 99.99%, a temperature of 10-35 deg.C, a pH of 3.8-4.5, and a current density of 0.2-0.8A/dm2And the time lasts for 30-60s, and the plating is washed by deionized water for 10-15 min.
5) Placing the sintered body into a gold plating tank to be plated with soft gold, wherein the purity of the soft gold is 99.99%, the temperature is maintained at 60-65 ℃, the PH is maintained at 5.8-6.2, and the current density is 0.2-0.3A/dm2After plating, washing with deionized water for 10-15min, ultrasonic washing for 20-40min, and keeping the temperature at 78-82 deg.C;
6) and drying the sintered body after gold plating in a drying box at 60-70 ℃.
The ultramicro rectangular electric connector and the manufacturing method thereof have the following beneficial effects:
1) the contact pitch of the invention is 0.74-0.76mm, the rated current is 1.8A, the medium withstand voltage is 300V, the mechanical life is at least 300 times, the diameter of the contact pin is phi 0.34-phi 0.36mm, the grinding surface can be processed on the side surface, the gold wire bonding area is minimum 0.158mm2。
2) The row spacing of the contact elements is 0.64-0.66mm, the length of the 37-core connector is 16.3-16.5mm, the width of the shell is 3.4-3.6mm, the height of the shell is 4.4-4.6mm, and the total volume is reduced by 35-40% compared with the connector in the prior art.
3) The invention adopts a glass slurry filling and sintering process. The process has the advantages of strong fluidity of glass slurry, low sintering temperature (400 ℃) and capability of obviously reducing the row spacing of the connector.
Drawings
In order to more clearly illustrate the technical solution of the present invention, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a schematic view of the overall structure of the present invention;
FIG. 2 is a schematic top view of the present invention;
FIG. 3 is a schematic structural view of a receptacle contact of the present invention;
FIG. 4 is a schematic layout of the receptacle contacts of the present invention;
FIG. 5 is a schematic view of the internal structure of the graphite mold of the present invention;
FIG. 6 is a schematic top view of the graphite mold of the present invention;
fig. 7 is a schematic view showing the operation of the graphite mold of the present invention.
The device comprises a shell 1, a step 101, a rectangular structure 102, a trapezoid step hollow structure 2, a glass base, a jack 3, an upper cylinder 301, a lower cylinder 302 and a plane 303.
Detailed Description
In the description of the present invention, it is to be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention. The terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.
The present invention will be described in detail below with reference to the accompanying drawings.
Example one
As shown in fig. 1 to 4, the ultra-micro rectangular electric connector comprises a shell 1, a glass base 2 and a plurality of jack contact elements 3, wherein a glass slurry filling and sintering process is adopted, the characteristics of strong fluidity and low sintering temperature of glass slurry are fully utilized, the row pitch of the connector can be remarkably reduced, the shell and the jack contact elements are made of alloy materials and are sintered with glass DM308 into a whole, and the formed leakage rate is not more than 1.01 multiplied by 10-3Pa•cm3The interface of the/S is sealed, in the figure 1, the outer part of a shell 1 is a step rectangular structure 101, the inner part of the shell 1 is a trapezoid step hollow structure 102, a plurality of jack contacts 3 are arranged on a glass base 2 in a double arrangement, the distance D1 between every two rows of jack contacts 3 is 0.74-0.76mm, and the distance D2 between two rows of jack contacts 3 is 0.64-0.66 mm.
In this embodiment, the number of the receptacle contacts 3 is 37, the 37 receptacle contacts 3 are arranged in two rows, the first row is provided with 18 receptacle contacts 3 at equal intervals, and the second row is provided with 19 receptacle contacts 3 at equal intervals, as shown in fig. 1 and 2.
As shown in FIGS. 3 and 4, the socket contact 3 is composed of an upper cylinder 301 and a lower cylinder 302, the bottom of the lower cylinder 302 is provided with a flat surface 303 for a gold wire, the diameter φ 1 of the upper cylinder 301 is 0.54-0.56mm, the diameter φ 2 of the lower cylinder 302 is 0.34-0.36 mm, and the area S of the flat surface 303 is at least 0.158mm2。
It should be noted that the lengths of the lower cylinders 302 of the front and rear adjacent socket contacts 3 are different, where: the height difference D3 between the front and rear adjacent lower cylinders 302 is 1.1-1.4 mm. The length of the shell 1 is 16.3-16.5mm, the width of the shell 1 is 3.4-3.6mm, the height of the shell 1 is 4.4-4.6mm, and the total volume is reduced by 35-40% compared with the prior art.
Specifically, the socket contact 3 is made of kovar alloy 4J29 material and has a surface plated with 99.99% gold, the shell 1 is made of kovar alloy 4J29 material and has a surface plated with 99.99% gold, and the glass base 2 is formed by sintering DM308 glass slurry.
Example two
In this embodiment, the method for manufacturing the submicro-rectangular electrical connector includes the following steps:
1) and (3) putting the shell 1 and the jack contact element 3 into deionized water for soaking for 2-3h, putting the shell 1 and the jack contact element 3 into a filtering container after soaking, washing with the deionized water, and dehydrating with absolute ethyl alcohol. Preferably, the metal parts (shell and jack) are soaked in deionized water for 2 hours, then placed in a filtering container, washed with deionized water and dehydrated by absolute ethyl alcohol.
2) Placing the shell 1 and the jack contact member 3 into a vacuum furnace, heating the furnace to 900--2-7.1×10-2Pa, performing surface purification on the shell 1 and the jack contact element 3; preferably, the metal part is placed into a vacuum furnace, the furnace temperature is raised to 950-: 40 min-50 min, vacuum degree 7X 10-2Pa, surface purification is carried out.
3) Placing the shell 1 and the jack contact element 3 into an oxidation furnace, heating the furnace to 650-; preferably, the metal parts are put into an oxidation furnace, the furnace temperature is raised to 650-750 ℃, and the heat preservation time is as follows: taking out the mixture for air cooling to room temperature after 10-12 min.
4) The graphite mould cleaned by the absolute alcohol is put into a vacuum furnace, the furnace temperature is increased to 900-1100 ℃, the heat preservation time is 30-40min, and the vacuum degree in the vacuum furnace is 6.9 multiplied by 10-2-7.1×10-2Pa, purifying the surface of the graphite mold; preferably, the graphite mold is repeatedly cleaned by absolute ethyl alcohol until no graphite dust falls, the graphite mold is placed into a vacuum furnace, the furnace temperature is raised to 950-1050 ℃, the heat preservation time is 30min, and the vacuum degree is 7 multiplied by 10-2Pa, surface purification is carried out. Specifically, as shown in fig. 5, 6 and 7, the graphite mold is composed of two parts, a base for mounting the housing and positioning the pitch and the row pitch of the insertion holes, and an insert for positioningThe height of the bit jack is high.
5) Cleaning the purified graphite mold by using a high-pressure dust blowing gun, loading the shell 1 into the graphite mold, and then loading the jack contact piece 3 into a positioning hole of the graphite mold;
6) injecting the glass slurry into a graphite mold in a vacuum glove box, placing the molded connector into a vacuum furnace, and filling the furnace with 3.9 × 10 glass slurry5-4.1×105High purity nitrogen gas with vacuum degree of 6.9X 10-2-7.1×10-2Pa, raising the temperature of the furnace to 390-410 ℃, keeping the temperature for 18-22h, cooling in the furnace and taking out; preferably, the molded connector is placed in a vacuum furnace and charged to 4X 105High purity nitrogen gas with vacuum degree of 7X 10-2Pa, raising the temperature of the furnace to 400 ℃, and keeping the temperature for a period of time: and (5) cooling in the furnace for 20h, and taking out.
7) And fixing the sintered body on a positioning tool, mounting the tool fixed with the sintered body on a high-precision grinding machine provided with a 100-mesh grinding wheel, grinding and processing a bonding surface, and performing an electroplating process after ensuring that the roughness of the bonding surface reaches at least 9 levels.
Specifically, the electroplating process comprises the following process steps:
1) boiling the sintered body in deoiling solution, removing oil with ultrasonic wave for 1-3min, cleaning with deionized water for 10-15min, and ultrasonic water washing for 20-40 min;
2) weakly corroding the sintered body for 1-5min, keeping the temperature at 30-50 ℃, washing with deionized water for 10-15min after corrosion, and ultrasonically washing for 20-40 min;
3) putting the sintered body into a nickel plating bath, keeping the temperature at 87-93 ℃, the pH at 4.4-4.8, keeping the duration for 10-15min, washing with deionized water for 10-15min after plating, and performing ultrasonic activation for 3-5 min;
4) pre-plating the sintered body in a gold plating bath with soft gold with a purity of 99.99%, a temperature of 10-35 deg.C, a pH of 3.8-4.5, and a current density of 0.2-0.8A/dm2And the time lasts for 30-60s, and the plating is washed by deionized water for 10-15 min.
5) Putting the sintered body into a gold plating groove to plate soft gold, wherein the purity of the soft gold is 99.99 percent, the temperature is kept between 60 and 65 ℃, the PH is kept between 5.8 and 6.2, and the current density is0.2-0.3A/dm2After plating, washing with deionized water for 10-15min, ultrasonic washing for 20-40min, and keeping the temperature at 78-82 deg.C;
6) and drying the sintered body after gold plating in a drying box at 60-70 ℃.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.

Claims (10)

1. A submicro-rectangular electrical connector comprising a housing (1), a glass base (2) and a plurality of receptacle contacts (3), wherein:
the outer part of the shell (1) is of a step rectangular structure (101), and the inner part of the shell (1) is of a trapezoid step hollow structure (102);
the jack contacts (3) are arranged on the glass base (2) in a double arrangement, the distance (D1) between every two rows of jack contacts (3) is 0.74-0.76mm, and the row distance (D2) between two rows of jack contacts (3) is 0.64-0.66 mm.
2. Submicrorectangular electrical connector according to claim 1, characterized in that said receptacle contact (3) consists of an upper cylinder (301) and a lower cylinder (302), the bottom of said lower cylinder (302) being provided with a flat surface (303) for gold bonding wires, the diameter (Φ 1) of said upper cylinder (301) being comprised between 0.54 and 0.56mm, the diameter (Φ 2) of said lower cylinder (302) being comprised between 0.34 and 0.36mm, the area (S) of said flat surface (303) being at least 0.158mm2。
3. The submicrorectangular electrical connector of claim 2, wherein the lower cylinders (302) of the front and rear adjacent receptacle contacts (3) are of different lengths, wherein: the height difference (D3) between the front and back adjacent lower cylinders (302) is 1.1-1.4 mm.
4. The submicrorectangular electrical connector according to claim 1, characterized in that the number of receptacle contacts (3) is 37, the 37 receptacle contacts (3) being arranged in two rows, the first row being equally spaced with 18 receptacle contacts (3) and the second row being equally spaced with 19 receptacle contacts (3).
5. The submicrorectangular electrical connector according to claim 1, characterized in that the length of said housing (1) is comprised between 16.3 and 16.5mm, the width of said housing (1) is comprised between 3.4 and 3.6mm and the height of said housing (1) is comprised between 4.4 and 4.6 mm.
6. The submirrquare electrical connector of claim 1, wherein the receptacle contact (3) is of kovar 4J29 material plated with 99.99% gold on its surface.
7. The submirrquare electrical connector of claim 1, characterized in that said housing (1) is made of kovar 4J29 material, plated with gold with a purity of 99.99%.
8. The submirrquare electrical connector of claim 1, wherein the glass base (2) is sintered from DM308 glass paste.
9. The method of making an ultra-subminiature electrical connector according to any one of claims 1 to 8, comprising the steps of:
1) placing the shell (1) and the jack contact element (3) into deionized water to be soaked for 2-3h, placing the shell (1) and the jack contact element (3) into a filtering container after soaking, washing with deionized water, and dehydrating with absolute alcohol;
2) placing the shell (1) and the jack contact element (3) into a vacuum furnace, and raising the temperature of the furnace toAfter the temperature is increased by 900 ℃ and 1100 ℃, the heat preservation time is 40-50min, and the vacuum degree in the vacuum furnace is 6.9 multiplied by 10-2-7.1×10-2Pa, performing surface purification on the shell (1) and the jack contact element (3);
3) placing the shell (1) and the jack contact piece (3) into an oxidation furnace, heating the furnace to 650-750 ℃, keeping the temperature for 10-12min, taking out the shell (1) and the jack contact piece (3) from the furnace, and air-cooling to room temperature;
4) the graphite mould cleaned by the absolute alcohol is put into a vacuum furnace, the furnace temperature is increased to 900-1100 ℃, the heat preservation time is 30-40min, and the vacuum degree in the vacuum furnace is 6.9 multiplied by 10-2-7.1×10-2Pa, purifying the surface of the graphite mold;
5) cleaning the purified graphite mold by using a high-pressure dust blowing gun, loading the shell (1) into the graphite mold, and then loading the jack contact piece (3) into a positioning hole of the graphite mold;
6) injecting the glass slurry into a graphite mold in a vacuum glove box, placing the molded connector into a vacuum furnace, and filling the furnace with 3.9 × 10 glass slurry5-4.1×105High purity nitrogen gas with vacuum degree of 6.9X 10-2-7.1×10-2Pa, raising the temperature of the furnace to 390-410 ℃, keeping the temperature for 18-22h, cooling in the furnace and taking out;
7) and fixing the sintered body on a positioning tool, mounting the tool fixed with the sintered body on a high-precision grinding machine provided with a 100-mesh grinding wheel, grinding and processing a bonding surface, and performing an electroplating process after ensuring that the roughness of the bonding surface reaches at least 9 levels.
10. The method of claim 9, wherein the electroplating process comprises the following steps:
1) boiling the sintered body in deoiling solution, removing oil with ultrasonic wave for 1-3min, cleaning with deionized water for 10-15min, and ultrasonic water washing for 20-40 min;
2) weakly corroding the sintered body for 1-5min, keeping the temperature at 30-50 ℃, washing with deionized water for 10-15min after corrosion, and ultrasonically washing for 20-40 min;
3) putting the sintered body into a nickel plating bath, keeping the temperature at 87-93 ℃, the pH at 4.4-4.8, keeping the duration for 10-15min, washing with deionized water for 10-15min after plating, and performing ultrasonic activation for 3-5 min;
4) pre-plating the sintered body in a gold plating bath with soft gold with a purity of 99.99%, a temperature of 10-35 deg.C, a pH of 3.8-4.5, and a current density of 0.2-0.8A/dm2The time lasts for 30-60s, and the plated film is washed by deionized water for 10-15 min;
5) placing the sintered body into a gold plating tank to be plated with soft gold, wherein the purity of the soft gold is 99.99%, the temperature is maintained at 60-65 ℃, the PH is maintained at 5.8-6.2, and the current density is 0.2-0.3A/dm2After plating, washing with deionized water for 10-15min, ultrasonic washing for 20-40min, and keeping the temperature at 78-82 deg.C;
6) and drying the sintered body after gold plating in a drying box at 60-70 ℃.
CN202011498695.2A 2020-12-18 2020-12-18 Ultra-micro rectangular electric connector and manufacturing method thereof Pending CN112563786A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114453631A (en) * 2022-01-24 2022-05-10 四川华丰科技股份有限公司 Milling device and milling process for contact bonding surface of micro rectangular connector

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114453631A (en) * 2022-01-24 2022-05-10 四川华丰科技股份有限公司 Milling device and milling process for contact bonding surface of micro rectangular connector

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