CN116979335A - Manufacturing process of DP connector female seat - Google Patents

Abstract

The invention discloses a manufacturing process of a DP connector female seat, which comprises the following steps: step 1, preparing an integrated double-row terminal; the contact parts and the fixing parts of the upper row of terminals and the lower row of terminals are arranged in two rows; step 2, one-time injection molding; step 3, removing the head end material belt; step 4, secondary injection molding; and 5, assembling the bottom cover and the shell. Therefore, by shortening the length of the open circuit branch, the fixed part area is divided into two rows, so that the distance between the adjacent differential pair terminals is increased, and the problems of loss and crosstalk of high-frequency signals are greatly improved; the two-shot injection molding mode is adopted, the integrated double-row terminal with innovative design can be positioned more reliably according to the requirement during one-shot injection molding, the terminal position and the size are ensured to be controlled more accurately, and the positioning slot gap of one-shot injection molding is filled through the two-shot injection molding mode, so that the medium change is eliminated, and the problem of differential impedance mutation is solved.

Description

Manufacturing process of DP connector female seat

Technical Field

The invention relates to the technical field of DP connectors, in particular to a manufacturing process of a DP connector female seat.

Background

DisplayPort, also known as a high definition digital display interface, is a digital video interface standard pushed by the video electronics standards institute, and is mainly adapted to connect a computer with a screen, or a computer with a home theater system.

As shown in fig. 16 to 18, which show the structures of the DP connector terminals and the DP connector female socket commonly used at present, the conventional DisplayPort electrical connector includes a housing, an insulating body, an upper row of terminals and a lower row of terminals, wherein the upper row of terminals and the lower row of terminals are injection molded in the insulating body at one time, and the housing is wrapped outside the insulating body, on one hand, the open-circuit branch distance L1 of the contact head of the differential pair terminal is too long to generate resonance, which affects crosstalk and differential signal attenuation, and on the other hand, the distance L2 of the contact head of the adjacent differential pair terminal is too small (only 0.3 mm), which has a large effect on crosstalk due to the emission and absorption effects of the open-circuit branch; furthermore, the fixing portions of the DP connector terminals are designed in a single row, and the fixing portions A1 of the upper row of terminals and the lower row of terminals are arranged in a row, so that the distance L3 between the transmission path sections of the adjacent differential pair terminals a is too short, and the crosstalk is also affected due to the coupling effect. Specifically, fig. 19 to 21 can be seen to show the insertion loss, return loss and far-end crosstalk of the DP connector female socket of the prior art when the high-frequency simulation experiment analysis is performed. Because of the limitation of the MOLDING MOLDING process, a plurality of positioning grooves exposed in the air between the terminals are needed in the insulating body, and because of different mediums (different dielectric constants of air and plastic), differential impedance mutation can be generated, so that the problem of unsatisfactory signal integrity is generated.

Therefore, a new technical solution is needed to solve the above problems.

Disclosure of Invention

In view of the above, the present invention aims to provide a method for manufacturing a semiconductor device

In order to achieve the above purpose, the present invention adopts the following technical scheme:

a manufacturing process of a DP connector female seat comprises the following steps of

Step 1, preparing an integrated double-row terminal; the integrated double-row terminal comprises an upper row terminal and a lower row terminal, and a head end material belt and a tail end material belt which are respectively connected with the heads and the tail ends of the upper row terminal and the lower row terminal; the upper row of terminals and the lower row of terminals comprise a plurality of contact terminals which are arranged side by side left and right, the contact terminals comprise contact parts, fixing parts and welding parts which are sequentially connected from front to back, and the contact parts and the fixing parts of the upper row of terminals and the lower row of terminals are arranged in two rows; open-circuit branches extend from the front ends of the contact parts, and the front ends of the open-circuit branches of the differential signal pair terminals of the upper row of terminals and the lower row of terminals are positioned behind the front ends of the open-circuit branches of at least one other contact terminal;

step 2, one-time injection molding; the integrated double-row terminal is fixed in the primary injection molding piece through primary injection molding, so that a primary injection molding terminal module is formed; a positioning groove exposing the fixing part in the air is formed in the primary injection molding part;

step 3, removing the head end material belt;

step 4, secondary injection molding; carrying out secondary injection molding on the primary injection molding terminal module with the head end material removed in the step 3, wrapping the head end of the primary injection molding piece by the secondary injection molding piece, combining and fixing the secondary injection molding piece with the primary injection molding piece, and filling the positioning slot gap of the primary injection molding piece in a secondary injection molding mode;

and 5, assembling the bottom cover and the shell.

As a preferable solution, in the step 1, four adjacent differential signal pair terminals are respectively defined as a first differential signal pair terminal, a second differential signal pair terminal, a third differential signal pair terminal, and a fourth differential signal pair terminal; the open circuit branches of adjacent signal terminals of adjacent signal pair terminals extend from the front ends of the contact portions to the sides away from each other, so as to enlarge the distances between the first differential signal pair terminals, the second differential signal pair terminals, the third differential signal pair terminals and the fourth differential signal pair terminals.

In a preferred embodiment, in step 1, in the integrated double-row terminal, the open branches of the same differential signal pair terminal are disposed to extend forward from the front ends of the contact portions toward each other.

In one preferable aspect, in the step 1, the fixing portions of adjacent signal terminals of adjacent signal pair terminals extend backward from the rear ends of the corresponding contact portions away from each other, so as to increase the distances between the fixing portions of the first differential signal pair terminal, the second differential signal pair terminal, the third differential signal pair terminal, and the fourth differential signal pair terminal.

As a preferable solution, in the step 1, in the integrated double-row terminal, a rear section of the fixing portion of the upper-row terminal extends downward to a first folding point position, and extends backward to form a first extension portion; the rear section of the fixing part of the lower row of terminals extends downwards to a second folding point position and extends backwards to form a second extending part; the first folding point position is positioned behind the second folding point position; a first bending part is connected between the first extending part and the welding part of the upper-row terminal, and a second bending part is connected between the second extending part and the welding part of the lower-row terminal; and 2, sealing and positioning the first bending part and the second bending part by plastic in one injection molding process.

As a preferable mode, the upper surfaces of the first extending part, the second extending part, the first bending part and the second bending part are sealed and positioned by plastic in one injection molding; and the bottoms of the first extension part and the second extension part are exposed at the bottom of the insulating body.

As a preferable mode, the first bending portion and the second bending portion are arranged in left-right alignment.

As a preferable mode, the bottom surfaces of the welding parts of the upper row of terminals and the welding parts of the lower row of terminals are lower than the bottom surfaces of the first extending part and the second extending part.

As a preferable mode, the top surfaces of the welding parts of the upper row of terminals and the welding parts of the lower row of terminals are lower than the top surfaces of the first extending part and the second extending part.

As a preferred solution, the one-shot injection molding piece comprises a base, a tongue top wall and a tongue left side wall integrally connected to the front end of the base, wherein the front end of the tongue left side wall exceeds the tongue top wall by a set length so as to form a preset groove positioned on the right side of the tongue left side wall on the front side of the tongue top wall, the positioning groove is arranged on the base, the positioning groove penetrates through the top and the bottom of the base, and the top and the bottom of the fixing part are exposed out of the positioning groove; the front end of the positioning groove passes through the front side of the base forwards through a through groove, and the through groove is positioned on the right side of the top wall of the tongue plate;

the secondary injection molding piece comprises a base filling part, a tongue plate right side wall integrally connected to the right side of the front end of the base filling part and a tongue plate top wall filling part integrally connected to the left end of the tongue plate right side wall, wherein the base filling part is combined in the positioning groove, the tongue plate right side wall is combined to the right side of the tongue plate top wall, the tongue plate top wall filling part is combined in the preset groove, other contact terminals except for the differential terminal pair terminal are combined in the preset groove, and the front section part of an open-circuit branch of the contact terminal is buried in the tongue plate top wall filling part without exposure of the front end of the tongue plate top wall filling part.

Compared with the prior art, the invention has obvious advantages and beneficial effects, in particular, the technical proposal can greatly improve the problems of loss and crosstalk of high-frequency signals by shortening the length of an open circuit branch, and simultaneously, the fixed part area is divided into two rows, which is convenient for enlarging the distance between adjacent differential pair terminals so as to improve the crosstalk; the two-shot injection molding mode is adopted, the integrated double-row terminal with innovative design can be positioned more reliably according to the requirement during one-shot injection molding, the terminal position and the size are ensured to be controlled more accurately, and the positioning slot gap of one-shot injection molding is filled through the two-shot injection molding mode, so that the medium change is eliminated, and the problem of differential impedance mutation is solved. Through the process design, after the structure of the DP connector terminal is innovatively designed, the simple production process requirement can be met, so that the DP connector terminal is suitable for popularization, production and application.

In order to more clearly illustrate the structural features and efficacy of the present invention, the present invention will be described in detail below with reference to the accompanying drawings and examples.

Drawings

FIG. 1 is a schematic diagram of a DP connector female unit according to an embodiment of the invention;

FIG. 2 is an exploded view of a DP connector female socket in accordance with an embodiment of the present invention;

FIG. 3 is a partial perspective view of the DP connector female unit according to an embodiment of the invention (step 4);

FIG. 4 is another partial perspective view of the DP connector female unit according to the embodiment of the invention (step 4);

FIG. 5 is a partial perspective view of the DP connector female unit according to the embodiment of the invention (step 3);

fig. 6 is a perspective view of upper and lower rows of terminals of a DP connector female socket according to an embodiment of the present invention (step 1);

FIG. 7 is a perspective view (blank out) of the upper and lower rows of terminals of the DP connector female housing in accordance with an embodiment of the present invention;

FIG. 8 is a side view (blank out) of the upper and lower rows of terminals of the DP connector female housing in accordance with an embodiment of the present invention;

FIG. 9 is another perspective view (blank out) of the upper and lower rows of terminals of the DP connector female housing in accordance with an embodiment of the present invention;

FIG. 10 is a partial perspective view of the connector terminals of the DP connector female unit (with the discharge strip shown) of an embodiment of the invention;

fig. 11 is a sectional view of a DP connector female socket (mainly showing a combined state of a lower row terminal and an insulating body, not shown in a housing) according to an embodiment of the present invention;

fig. 12 is a cross-sectional view of a DP connector female socket (mainly showing a combined state of upper row terminals and an insulating body, not shown in the housing) according to an embodiment of the present invention;

FIG. 13 is a diagram showing the insertion loss of a DP connector female socket in performing high frequency simulation test analysis in accordance with an embodiment of the present invention;

FIG. 14 is a diagram showing the return loss of a DP connector female unit during high frequency simulation test analysis in accordance with one embodiment of the present invention;

FIG. 15 is a schematic diagram showing the far-end crosstalk of a DP connector female unit according to an embodiment of the invention when performing high-frequency simulation test analysis;

fig. 16 is a partial perspective view of a prior art DP connector female socket (containing an insulator, upper and lower rows of terminals, not shown in the housing);

fig. 17 is a perspective view of upper and lower row terminals of a prior art DP connector female socket;

fig. 18 is another perspective view of upper and lower row terminals of a prior art DP connector female socket;

fig. 19 is a diagram showing the insertion loss of a DP connector female socket of the prior art when performing high frequency simulation experimental analysis;

FIG. 20 is a diagram showing the return loss of a prior art DP connector female connector unit when performing high frequency simulation experimental analysis;

fig. 21 is a diagram showing the far-end crosstalk of the DP connector female socket of the prior art when performing high-frequency simulation experimental analysis.

The attached drawings are used for identifying and describing: the housing 10, the insulating body 20, the primary injection molding 21, the secondary injection molding 22, the positioning groove 211, the through groove 212, the pre-groove 213, the base 201, the tongue top wall 202, the tongue left side wall 203, the base filling portion 204, the tongue right side wall 205, the tongue top wall filling portion 206, the DP connector terminal 30, the head end material tape 3001, the tail end material tape 3002, the upper row of terminals 31, the lower row of terminals 32, the contact portion 301, the fixing portion 302, the connecting portion 303, the first folding point position 304, the first extension portion 305, the second folding point position 306, the second extension portion 307, the first folding portion 308, the second folding portion 309, the first differential signal pair terminal 1, the second differential signal pair terminal 2, the third differential signal pair terminal 3, the fourth differential signal pair terminal 4, the open circuit B, and the bottom cover 40.

Detailed Description

Referring to fig. 1 to 15, specific structures and manufacturing processes of embodiments of the present invention are shown.

In the description of the present invention, it should be noted that the azimuth or positional relationship indicated by the terms "upper", "lower", "left", "right", etc. are based on the azimuth or positional relationship shown in the drawings, and are merely for convenience of describing the present invention and simplifying the description, and do not indicate or imply that the apparatus or element referred to must have a specific azimuth, be constructed and operated in a specific azimuth, and thus should not be construed as limiting the present invention.

A manufacturing process of a DP connector female seat comprises the following steps of

Step 1, preparing an integrated double-row terminal; the integrated double-row terminal comprises an upper row terminal, a lower row terminal, a head end material belt 3001 and a tail end material belt 3002 which are respectively connected with the heads and the tail ends of the upper row terminal and the lower row terminal; the upper row of terminals and the lower row of terminals comprise a plurality of contact terminals which are arranged side by side left and right, the contact terminals comprise contact parts, fixing parts and welding parts which are sequentially connected from front to back, and the contact parts and the fixing parts of the upper row of terminals and the lower row of terminals are arranged in two rows; the front end of the contact part extends forwards to form an open-circuit branch which is buried in the insulating body, and the front ends of the open-circuit branches of the differential signal pair terminals of the upper row of terminals and the lower row of terminals are positioned behind the front ends of the open-circuit branches of at least one other contact terminal;

step 2, one-time injection molding; the integrated double-row terminal is fixed in the primary injection molding piece through primary injection molding, so that a primary injection molding terminal module is formed; a positioning groove 211 exposing the fixing part in the air is formed in the primary injection molding part; specifically, the primary injection molding piece includes a base 201, a tongue top wall 202 integrally connected to the front end of the base 201, and a tongue left side wall 203, wherein the front end of the tongue left side wall 203 exceeds the tongue top wall 202 by a set length, so as to form a preset groove 213 on the front side of the tongue top wall 202 and located on the right side of the tongue left side wall 203, and the open branch of the head end material strip and part of the contact terminal is exposed in the preset groove 213; specifically, the open branches of the differential signal pair terminals are all buried in the top wall 202 of the tongue plate of the primary forming member, after the material tape is removed in step 3, the material tape arm connected with the front end of the open branch of the differential signal pair terminal is disconnected at the front end of the top wall of the tongue plate, according to the difference of the actual material tape removing error conditions, the possible fracture is flush with the front end of the top wall of the tongue plate or slightly left with a little residue to be exposed to the front end of the top wall of the tongue plate, while the other contact terminals except the differential terminal pair terminals have their rear sections of open branches buried in the top wall of the tongue plate of the primary forming member, and after the material tape is removed in step 3, the front sections of the open branches are exposed to the preset groove; the positioning groove 211 is arranged on the base, the positioning groove 211 penetrates through the top and the bottom of the base, and the top and the bottom of the fixing part are exposed out of the positioning groove 211; the front end of the positioning groove 211 passes through the front side of the base forwards through a through groove 212, and the through groove 212 is positioned on the right side of the top wall of the tongue plate;

step 3, removing the head end material belt;

step 4, secondary injection molding; and (3) carrying out secondary injection molding on the primary injection molding terminal module with the head end material strip 3001 removed in the step (3), wrapping the head end of the primary injection molding piece by the secondary injection molding piece, combining and fixing the secondary injection molding piece with the primary injection molding piece, and filling the positioning slot gap of the primary injection molding piece in a secondary injection molding mode so as to eliminate medium change and improve the problem of differential impedance mutation. Specifically, the two-shot molding piece includes a base filling portion 204, a tongue plate right side wall 205 integrally connected to the right side of the front end of the base filling portion 204, and a tongue plate top wall filling portion 206 integrally connected to the left end of the tongue plate right side wall 205, wherein the base filling portion 204 is combined in the positioning groove 211, the tongue plate right side wall 205 is combined in the right side of the tongue plate top wall 202, the tongue plate top wall filling portion 206 is combined in the pre-groove 213, the other contact terminals except for the differential terminal pair terminals are embedded in the tongue plate top wall filling portion 206, the front section of the open-circuit branch is not exposed at the front end of the tongue plate top wall filling portion 206, and the surface flatness is good.

And, step 5, assembling the bottom cover 40 and the housing 10, typically by first assembling the bottom cover 40 and then assembling the housing 10. Prior to assembly, the tail stock strip 3002 is removed.

Next, a DP connector female socket is described, which includes a housing 10, an insulating body 20, and a DP connector terminal 30 disposed in the insulating body 20. The shell 10 is a metal shell and also a shielding shell, the shell 10 is wrapped outside the insulating body 20, and the shell 10 and the insulating body 20 are fastened and riveted. Positioning pins extend downwards on the left side and the right side of the shell 10.

The insulator 20 includes a primary injection molding member 21 and a secondary injection molding member 22, the DP connector terminal 30 is first fixed in the primary injection molding member 21 by primary injection molding, the material strip at the head end of the DP connector terminal 30 is removed, and then the secondary injection molding is performed, and the secondary injection molding member 22 wraps the head end of the DP connector terminal 30 and is combined and fixed with the primary injection molding member 21. A bottom cover 40 is assembled to the bottom of the insulating body 20.

The DP connector terminal 30 is an integrated double-row terminal, and comprises an upper row terminal 31 and a lower row terminal, wherein the upper row terminal 31 and the lower row terminal 32 each comprise a plurality of contact terminals arranged side by side left and right, the contact terminals comprise a contact portion 301, a fixing portion 302 and a connecting portion 303 (usually also referred to as a welding portion) which are sequentially connected, the front end of the contact portion 301 extends to form an open-circuit branch B for being buried in the insulating body 20, and differential signal pair terminals are defined in the contact terminals of the upper row terminal 31 and the lower row terminal 32; the front end of the open branch B of the differential signal pair terminal is located behind the front end of the open branch of at least one other contact terminal, so as to shorten the length L4 of the open branch of the differential signal pair terminal, while the length L5 of the open branch of the other contact terminal may not be limited. Typically the front ends of the open branches B of the differential signal pair terminals are located rearward of the front ends of the open branches B of any other contact terminals; the four adjacent differential signal pair terminals are respectively defined as a first differential signal pair terminal 1, a second differential signal pair terminal 2, a third differential signal pair terminal 3 and a fourth differential signal pair terminal 4; the open branches of the adjacent signal terminals of the adjacent signal pair terminals extend from the front ends of the contact portions toward the sides away from each other, so as to increase the distances between the open branch heads of the first differential signal pair terminal 1, the second differential signal pair terminal 2, the third differential signal pair terminal 3, and the fourth differential signal pair terminal 4. For example, the first differential signal pair terminal 1 and the second differential signal pair terminal 2 are separated by a distance L6 from the head of the open branch B. The open branches B of the same differential signal pair terminal extend from the distal ends of the contact portions 301 toward the front side.

And, the upper row of terminals 31 and the lower row of terminals 32 are arranged in two rows up and down in the area of the fixing portion 302. The fixing portions 302 of adjacent signal terminals of adjacent signal pair terminals extend rearward from the rear ends of the corresponding contact portions 301 away from each other, so as to increase the distance between the fixing portions of the first differential signal pair terminal 1, the second differential signal pair terminal 2, the third differential signal pair terminal 3, and the fourth differential signal pair terminal 4. For example, the first differential signal pair terminal 1 and the second differential signal pair terminal 2 are spaced apart by a distance L7 from the fixed portion 302. By separating this area of terminals into two rows, the increased distance between adjacent differential pair terminals improves crosstalk.

The rear section of the fixing portion 302 of the upper row of terminals 31 extends downward to a first folding point 304, and extends rearward with a first extending portion 305; the rear section of the fixing portion 302 of the lower row of terminals 32 extends downward to a second folding point 306, and extends rearward with a second extending portion 307; the first folding point position 304 is located behind the second folding point position 306; a first bending portion 308 is connected between the first extending portion 305 and the welding portion 303 of the upper row of terminals 31, and a second bending portion 309 is connected between the second extending portion 307 and the welding portion 303 of the lower row of terminals 32. The first bending portion 308 and the second bending portion 309 have at least one injection molding positioning surface disposed in a coplanar manner. Generally, the first bending portion 308 and the second bending portion 309 are aligned left and right, so that the bending operation is completed at one time, the bending positions are consistent, and the uniformity of bending dimensions, particularly bending heights, can be better controlled, so that the welding portions 303 are all located at the same height, the coplanarity of the welding surfaces of the welding portions 303 is better, the welding portions 303 of the upper row of terminals 31 and the bottom surfaces of the welding portions 303 of the lower row of terminals 32 can be accurately arranged in a flush manner, and the problem of poor soldering tin of the welding portions 303 is better solved. Because the fixing portion is arranged in double rows, the positions of the first folding point position 304 and the second folding point position 306 are staggered from front to back, if no bending portion is arranged, the welding pins of the two rows of terminals are not long, the coplanarity of the welding pins of the two rows of terminals cannot be ensured due to the fact that the stamping size is unstable easily when the terminals are produced by actual stamping, so that the problem of poor soldering tin of the welding pins is caused, the soldering yield is negatively influenced, and the problem of poor soldering tin of the welding portion 303 is solved through the arrangement of the first bending portion 308 and the second bending portion 309. During injection molding, the first bending portion 308 and the second bending portion 309 of the connector terminal are sealed and positioned by plastic during molding of the insulating body, so that the coplanarity of the welding portion 303 is controlled, and the welding yield is improved.

The bottom surfaces (typically, the bonding surfaces of the patches) of the bonding portions 303 of the upper-row terminals 31 and the bonding portions 303 of the lower-row terminals 32 are lower than the bottom surfaces of the first extending portions 305 and the second extending portions 307. The top surfaces of the welded portions 303 of the upper row of terminals 31 and the welded portions 303 of the lower row of terminals 32 are lower than the top surfaces of the first extending portions 305 and the second extending portions 307. The rear end of the first extension portion 305 is aligned with the rear end of the second extension portion 307, and the front-rear length of the first extension portion 305 is smaller than the front-rear length of the second extension portion 307.

The upper surfaces of the first extending part, the second extending part, the first bending part and the second bending part are sealed and positioned by plastic in one injection molding; and the bottoms of the first extension part and the second extension part are exposed at the bottom of the insulating body. The first bending part and the second bending part are arranged in left-right alignment. The bottom surfaces of the welding parts of the upper row of terminals and the welding parts of the lower row of terminals are lower than the bottom surfaces of the first extending part and the second extending part. The top surfaces of the welding parts of the upper row of terminals and the welding parts of the lower row of terminals are lower than the top surfaces of the first extending part and the second extending part.

The applicant has conducted high-frequency simulation test analysis on the prior art DP2.0 connector and the DP40 connector of the present embodiment, and compared with fig. 13 to 15, it is understood that the DP connector socket of the present embodiment is greatly improved in terms of insertion loss, return loss, far-end crosstalk, etc. compared with the prior art by conducting high-frequency simulation test analysis on fig. 19 to 21.

The design key point of the invention is that the invention mainly shortens the length of the open circuit branch, thereby greatly improving the loss and crosstalk problems of high-frequency signals, and simultaneously, the fixed part area is divided into two rows, which is convenient for enlarging the terminal distance of adjacent differential pairs so as to improve the crosstalk; the two-shot injection molding mode is adopted, the integrated double-row terminal with innovative design can be positioned more reliably according to the requirement during one-shot injection molding, the terminal position and the size are ensured to be controlled more accurately, and the positioning slot gap of one-shot injection molding is filled through the two-shot injection molding mode, so that the medium change is eliminated, and the problem of differential impedance mutation is solved. Through the process design, after the structure of the DP connector terminal is innovatively designed, the simple production process requirement can be met, so that the DP connector terminal is suitable for popularization, production and application.

The foregoing description is only a preferred embodiment of the present invention, and is not intended to limit the technical scope of the present invention, so any minor modifications, equivalent changes and modifications made to the above embodiments according to the technical principles of the present invention are still within the scope of the technical solutions of the present invention.

Claims (10)

1. A manufacturing process of a DP connector female seat is characterized by comprising the following steps of: comprises the following steps of

Step 1, preparing an integrated double-row terminal; the integrated double-row terminal comprises an upper row terminal and a lower row terminal, and a head end material belt and a tail end material belt which are respectively connected with the heads and the tail ends of the upper row terminal and the lower row terminal; the upper row of terminals and the lower row of terminals comprise a plurality of contact terminals which are arranged side by side left and right, the contact terminals comprise contact parts, fixing parts and welding parts which are sequentially connected from front to back, and the contact parts and the fixing parts of the upper row of terminals and the lower row of terminals are arranged in two rows; open-circuit branches extend from the front ends of the contact parts, and the front ends of the open-circuit branches of the differential signal pair terminals of the upper row of terminals and the lower row of terminals are positioned behind the front ends of the open-circuit branches of at least one other contact terminal;

step 2, one-time injection molding; the integrated double-row terminal is fixed in the primary injection molding piece through primary injection molding, so that a primary injection molding terminal module is formed; a positioning groove exposing the fixing part in the air is formed in the primary injection molding part;

step 3, removing the head end material belt;

step 4, secondary injection molding; carrying out secondary injection molding on the primary injection molding terminal module with the head end material removed in the step 3, wrapping the head end of the primary injection molding piece by the secondary injection molding piece, combining and fixing the secondary injection molding piece with the primary injection molding piece, and filling the positioning slot gap of the primary injection molding piece in a secondary injection molding mode;

and 5, assembling the bottom cover and the shell.

2. The process for manufacturing a DP connector female socket as set forth in claim 1, wherein:

in the integrated double-row terminal, four adjacent differential signal pair terminals are respectively defined as a first differential signal pair terminal, a second differential signal pair terminal, a third differential signal pair terminal and a fourth differential signal pair terminal; the open circuit branches of adjacent signal terminals of adjacent signal pair terminals extend from the front ends of the contact portions to the sides away from each other, so as to enlarge the distances between the first differential signal pair terminals, the second differential signal pair terminals, the third differential signal pair terminals and the fourth differential signal pair terminals.

3. The process for manufacturing a DP connector master socket according to claim 2, wherein: in the step 1, in the integrated double-row terminal, the open branches of the same differential signal pair terminal extend from the front ends of the contact portions toward each other.

4. A process for manufacturing a DP connector female socket according to claim 2 or 3, wherein: in the step 1, the fixing portions of adjacent signal terminals of adjacent signal pair terminals extend backward from the rear ends of the corresponding contact portions away from each other, so as to increase the distance between the fixing portions of the first differential signal pair terminals, the second differential signal pair terminals, the third differential signal pair terminals, and the fourth differential signal pair terminals.

5. The process for manufacturing a DP connector female socket as set forth in claim 1, wherein: in the integrated double-row terminal, the rear section of the fixing part of the upper-row terminal extends downwards to a first folding point position and extends backwards to form a first extending part; the rear section of the fixing part of the lower row of terminals extends downwards to a second folding point position and extends backwards to form a second extending part; the first folding point position is positioned behind the second folding point position; a first bending part is connected between the first extending part and the welding part of the upper-row terminal, and a second bending part is connected between the second extending part and the welding part of the lower-row terminal; and 2, sealing and positioning the first bending part and the second bending part by plastic in one injection molding process.

6. The process for manufacturing a DP connector master socket according to claim 5, wherein:

the upper surfaces of the first extending part, the second extending part, the first bending part and the second bending part are sealed and positioned by plastic in one injection molding; and the bottoms of the first extension part and the second extension part are exposed at the bottom of the insulating body.

7. The process for manufacturing a DP connector master socket according to claim 5, wherein: the first bending part and the second bending part are arranged in left-right alignment.

8. The process for manufacturing a DP connector master socket according to claim 5, wherein: the bottom surfaces of the welding parts of the upper row of terminals and the welding parts of the lower row of terminals are lower than the bottom surfaces of the first extending part and the second extending part.

9. The process for manufacturing a DP connector master socket according to claim 5, wherein: the top surfaces of the welding parts of the upper row of terminals and the welding parts of the lower row of terminals are lower than the top surfaces of the first extending part and the second extending part.

10. The process for manufacturing a DP connector female socket as set forth in claim 1, wherein: the one-time injection molding piece comprises a base, a tongue plate top wall and a tongue plate left side wall which are integrally connected to the front end of the base, wherein the front end of the tongue plate left side wall exceeds the tongue plate top wall by a set length so as to form a preset groove positioned on the right side of the tongue plate left side wall on the front side of the tongue plate top wall, the positioning groove is arranged on the base, the positioning groove penetrates through the top and the bottom of the base, and the top and the bottom of the fixing part are exposed out of the positioning groove; the front end of the positioning groove passes through the front side of the base forwards through a through groove, and the through groove is positioned on the right side of the top wall of the tongue plate;

the secondary injection molding piece comprises a base filling part, a tongue plate right side wall integrally connected to the right side of the front end of the base filling part and a tongue plate top wall filling part integrally connected to the left end of the tongue plate right side wall, wherein the base filling part is combined in the positioning groove, the tongue plate right side wall is combined to the right side of the tongue plate top wall, the tongue plate top wall filling part is combined in the preset groove, other contact terminals except for the differential terminal pair terminal are combined in the preset groove, and the front section part of an open-circuit branch of the contact terminal is buried in the tongue plate top wall filling part without exposure of the front end of the tongue plate top wall filling part.