CN115604909A - FPC board capable of preventing plug-in fingers from deviating and testing method thereof - Google Patents

FPC board capable of preventing plug-in fingers from deviating and testing method thereof Download PDF

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Publication number
CN115604909A
CN115604909A CN202211165289.3A CN202211165289A CN115604909A CN 115604909 A CN115604909 A CN 115604909A CN 202211165289 A CN202211165289 A CN 202211165289A CN 115604909 A CN115604909 A CN 115604909A
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CN
China
Prior art keywords
fpc
deviation
fingers
finger
detection points
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Pending
Application number
CN202211165289.3A
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Chinese (zh)
Inventor
李一孝
李守刚
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Taishan Jingchengda Electric Circuit Co ltd
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Taishan Jingchengda Electric Circuit Co ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Application filed by Taishan Jingchengda Electric Circuit Co ltd filed Critical Taishan Jingchengda Electric Circuit Co ltd
Priority to CN202211165289.3A priority Critical patent/CN115604909A/en
Publication of CN115604909A publication Critical patent/CN115604909A/en
Pending legal-status Critical Current

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    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K1/00—Printed circuits
    • H05K1/02—Details
    • H05K1/0266—Marks, test patterns or identification means
    • H05K1/0268—Marks, test patterns or identification means for electrical inspection or testing
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
    • G01R31/28—Testing of electronic circuits, e.g. by signal tracer
    • G01R31/2801—Testing of printed circuits, backplanes, motherboards, hybrid circuits or carriers for multichip packages [MCP]
    • G01R31/2818—Testing of printed circuits, backplanes, motherboards, hybrid circuits or carriers for multichip packages [MCP] using test structures on, or modifications of, the card under test, made for the purpose of testing, e.g. additional components or connectors

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  • Engineering & Computer Science (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Computer Hardware Design (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Testing Of Short-Circuits, Discontinuities, Leakage, Or Incorrect Line Connections (AREA)

Abstract

The invention provides an FPC board for preventing plug-in fingers from deviating from a sliding direction and a test method thereof, wherein the FPC board comprises an FPC board to be tested; the FPC board to be tested comprises FPC plug-in fingers, a positioning hole, at least one anti-deviation line and a plurality of metal detection points; the positioning hole is arranged on the periphery of the FPC plugging finger; the metal detection points are arranged on the periphery of the FPC plugging finger in a grouping mode and do not coincide with the positioning holes; the anti-deviation lines are respectively connected with each group of metal detection points; set up a plurality of metal check points around FPC grafting finger to connect corresponding metal check point through the inclined to one side line of scour protection, when FPC grafting finger carries out the electrical test, the metal check point can be aimed at fast to the test probe, can judge whether the off normal appears in the product blanking only through the break-make of the inclined to one side line of scour protection in the testing process, need not to use check out test set to carry out extra detection procedure, improves detection efficiency, and detects the precision height.

Description

FPC board capable of preventing plug-in fingers from deviating and testing method thereof
Technical Field
The invention relates to the field of circuit boards, in particular to an FPC board for preventing plug-in fingers from deviating and a test method thereof.
Background
The plug-in fingers are connecting parts between the memory strip and the memory slot, and all signals are transmitted through the plug-in fingers. The plug-in fingers are composed of a plurality of golden conductive contact pieces, and are also called golden fingers because the surfaces of the golden conductive contact pieces are plated with gold and the conductive contact pieces are arranged like fingers. At present, the plugging fingers have the problem of deviation after being punched on a Flexible Printed Circuit board (FPC), and in order to solve the problem of deviation, devices such as a quadratic element measuring Device, a 40-time magnifying lens, a Charge Coupled Device (CCD) magnifying lens, a film inspection tester and the like are used for testing at present, so that the testing time is seriously wasted, the labor cost is increased, the testing efficiency is too low, defective products cannot be intercepted by 100%, and the accuracy is not high.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: the FPC board capable of preventing the deviation of the inserted fingers from being resisted and the testing method thereof are provided, and the testing efficiency and the testing accuracy of the deviation of the inserted fingers of the FPC are improved.
In order to solve the technical problems, the invention adopts the technical scheme that:
an FPC board for preventing plug-in fingers from deviating comprises an FPC board to be tested;
the FPC board to be tested comprises FPC plug-in fingers, a positioning hole, at least one anti-deviation line and a plurality of metal detection points;
the positioning hole is arranged on the periphery of the FPC plugging finger;
the metal detection points are arranged on the periphery of the FPC plug-in finger in groups and are not overlapped with the positioning holes;
the anti-deviation lines are respectively connected with each group of metal detection points.
In order to solve the technical problem, the invention adopts another technical scheme as follows:
a method for testing an FPC board with inserted fingers preventing deviation from scouring is characterized in that the FPC board with inserted fingers preventing deviation from scouring is placed on a testing frame to realize conduction testing.
The invention has the beneficial effects that: set up a plurality of metal check points around FPC grafting finger, and connect corresponding metal check point through the inclined to one side line of scour protection, when FPC grafting finger carries out the electric test, but the metal check point can be aimed at fast to the test probe, set up in FPC grafting finger's periphery because of the metal check point, if the deviation then connect the inclined to one side line of scour protection of metal check point and can be broken by the dashing off, then circuit disconnection between the metal check point of its connection, thereby only can judge whether the off normal appears in the product blanking through the break-make of scour protection inclined to one side line in the testing process, need not to use check out test set to carry out extra detection procedure, and the detection efficiency is improved, and the detection precision is high.
Drawings
Fig. 1 is a schematic structural diagram of an FPC board for preventing insertion fingers from deviating from the printed circuit board according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of another FPC board for preventing a plug-in finger from deviating;
fig. 3 is a schematic structural diagram of a group of metal detection points according to an embodiment of the present invention;
description of the reference symbols:
1. inserting fingers into the FPC; 2. positioning holes; 3. preventing a deflection line; 4. and (6) detecting a metal point.
Detailed Description
In order to explain technical contents, achieved objects, and effects of the present invention in detail, the following description is made with reference to the accompanying drawings in combination with the embodiments.
Referring to fig. 1, an embodiment of the present invention provides an FPC board for preventing a plug-in finger from deviating, including an FPC board to be tested;
the FPC board to be tested comprises FPC plug-in fingers, a positioning hole, at least one anti-deviation line and a plurality of metal detection points;
the positioning hole is arranged on the periphery of the FPC plugging finger;
the metal detection points are arranged on the periphery of the FPC plugging finger in a grouping mode and do not coincide with the positioning holes;
the anti-deviation lines are respectively connected with each group of metal detection points.
From the above description, the beneficial effects of the present invention are: set up a plurality of metal check points around FPC grafting finger, and connect corresponding metal check point through the inclined to one side line of scour protection, when FPC grafting finger carries out the electric test, but the metal check point can be aimed at fast to the test probe, set up in FPC grafting finger's periphery because of the metal check point, if the deviation then connect the inclined to one side line of scour protection of metal check point and can be broken by the dashing off, then circuit disconnection between the metal check point of its connection, thereby only can judge whether the off normal appears in the product blanking through the break-make of scour protection inclined to one side line in the testing process, need not to use check out test set to carry out extra detection procedure, and the detection efficiency is improved, and the detection precision is high.
Furthermore, the positioning holes are arranged on two opposite first sides of the FPC plugging finger, and the group of metal detection points are arranged on a second side of the FPC plugging finger;
the number of the metal detection points in one group is two.
According to the anti-impact deviation line, the anti-impact deviation line is designed according to different positions of the positioning holes, and the anti-impact deviation line is designed by avoiding the positions of the positioning holes, so that the anti-impact deviation line does not need to consider the positions of the positioning holes, has a larger wiring space and is convenient to wire.
Furthermore, the number of the anti-deviation lines is one; and two ends of the anti-deviation line are respectively connected with the metal detection points of the same group.
It can be known from the above description that when the locating hole is located both sides, then set up the metal detection point in the front end of grafting finger, be located different sides with the locating hole, have bigger wiring space, only set up a scour protection inclined to one side line and be used for connecting two metal detection points, guarantee the independent setting of scour protection inclined to one side line, separate with other circuits on the FPC board.
Furthermore, the positioning holes are formed in the second sides of the FPC inserting fingers, and the two groups of metal detection points are respectively arranged on the two opposite first sides of the FPC inserting fingers;
the number of the metal detection points in one group is two.
As can be seen from the above description, when the positioning hole is located at the front end, the metal detection points are respectively disposed at two sides of the plugging finger, and are located at different sides from the positioning hole, thereby having a larger wiring space.
Further, the distances between the two groups of metal detection points and the FPC plugging fingers are the same.
According to the description, the distances between the metal detection points on the two sides and the FPC plugging fingers are the same, the symmetry of the FPC plugging fingers is guaranteed, the anti-impact deviation lines can be broken by the displacement towards the two sides in the blanking process, the symmetry is guaranteed in the process of blanking the FPC plugging fingers, and therefore the blanking deviation of the FPC plugging fingers is avoided.
Furthermore, the number of the anti-deviation lines is two; and two ends of each anti-deviation line are respectively connected with the metal detection points in the same group.
As can be seen from the above description, when the metal detection points are located on both sides of the insertion finger, two anti-deviation lines are respectively arranged for connecting the metal detection points located on the same side, so as to ensure the blanking process without causing the die to deviate to one side; and the two anti-deviation lines are independent from each other, so that the deviation condition of one side of the FPC plugging finger can be independently tested, the testing precision is improved, and the inspection quality is ensured.
Furthermore, each anti-deviation line is an independent line.
According to the above description, the anti-deviation line needs to be an independent network line and cannot be connected with surrounding large lines, so that whether deviation occurs in product blanking can be judged only through the on-off of the anti-deviation line in the test process, other lines do not need to be measured, and the detection steps are simplified.
Furthermore, the anti-deviation line is of a bending structure, and one section of the anti-deviation line is parallel to the FPC plugging finger.
According to the above description, the anti-impact bias line is of a bending structure and is parallel to the FPC plugging finger, the relative position of the anti-impact bias line and the FPC plugging finger is limited, the consistency of the anti-impact bias line and the FPC plugging finger blanking position is guaranteed, the bias condition of the FPC plugging finger is determined through the on-off of the anti-impact bias line, and the testing accuracy is further improved.
Further, the line width of the anti-deviation line is set according to a preset deviation control tolerance.
As can be seen from the above description, since the anti-deviation line can have a line width, if the anti-deviation line is not broken, it indicates that the FPC plugging finger does not deviate or the deviation distance is within the tolerance range in the blanking process; if the anti-deviation line is broken, the deviation of the FPC plugging finger is generated in the blanking process, and the deviation distance exceeds the tolerance range; therefore, the line width of the anti-deviation line is related to the deviation tolerance, so that the deviation amount can be controlled. And the deviation tolerance requirements of each user on the FPC plugging fingers are different, so the line width of the deviation-preventing line needs to be determined according to the requirements of the user during design, thereby reducing the quality yield caused by misjudgment and reducing the production cost.
The invention further provides a method for testing the FPC board with the inserted fingers preventing the deviation from occurring, and the conduction test is realized by placing the FPC board with the inserted fingers preventing the deviation from occurring on a test frame.
From the above description, the beneficial effects of the present invention are: set up a plurality of metal check points around FPC grafting finger, and connect corresponding metal check point through the inclined to one side line of scour protection, when FPC grafting finger carries out the electric test, but the metal check point can be aimed at fast to the test probe, set up in FPC grafting finger's periphery because of the metal check point, if the deviation then connect the inclined to one side line of scour protection of metal check point and can be broken by the dashing off, then circuit disconnection between the metal check point of its connection, thereby only can judge whether the off normal appears in the product blanking through the break-make of scour protection inclined to one side line in the testing process, need not to use check out test set to carry out extra detection procedure, and the detection efficiency is improved, and the detection precision is high.
The FPC board for preventing the inserting fingers from deviating from the impact and the testing method thereof provided by the embodiment of the invention can be applied to the blanking process of the inserting fingers of the FPC, the testing efficiency and the accuracy of preventing the inserting fingers of the FPC from deviating from the impact are improved, and the following description is provided by the specific embodiment:
referring to fig. 1 to fig. 3, a first embodiment of the present invention is:
an FPC board for preventing plug-in fingers from deviating comprises an FPC board to be tested;
the FPC board to be tested comprises FPC inserting fingers 1, a positioning hole 2, at least one anti-deviation line 3 and a plurality of metal detection points 4;
the positioning holes 2 are arranged on the periphery of the FPC inserting fingers 1;
the metal detection points 4 are arranged on the periphery of the FPC plugging finger 1 in a grouping mode and are not overlapped with the positioning holes 2;
the anti-deviation lines 3 are respectively connected with each group of metal detection points 4.
Referring to fig. 1, in an alternative embodiment, the positioning holes 2 are disposed on two opposite first sides of the FPC insertion finger 1, and the group of metal detection points 4 are disposed on a second side of the FPC insertion finger 1; wherein, the number of the group of metal detection points 4 is two; the number of the anti-deviation lines 3 is one; the two ends of the anti-deviation line 3 are respectively connected with the metal detection points 4 in the same group.
Specifically, the FPC board further comprises a bottom board, and the FPC plugging fingers are arranged at one end of the surface of the bottom board; the positioning hole 2 and the metal detection point 4 are both arranged on one side, close to the FPC plug-in finger, of the bottom plate; the positioning holes 2 are formed in two opposite first sides, close to the FPC inserting fingers 1, of the bottom plate, and the metal detection points 4 are arranged on a second side, close to the FPC inserting fingers 1, of the bottom plate.
Referring to fig. 2, in an alternative embodiment, the positioning hole 2 is disposed on a second side of the FPC insertion finger 1, and the two sets of metal detection points 4 are respectively disposed on two opposite first sides of the FPC insertion finger 1; wherein the number of the metal detection 4 points in one group is two; the distances between the two groups of metal detection points 4 and the FPC plugging finger 1 are the same; the number of the anti-deviation lines 3 is two; and two ends of each anti-deviation line 3 are respectively connected with the metal detection points 4 in the same group.
Specifically, the FPC board further comprises a bottom board, and the FPC plugging fingers are arranged at one end of the surface of the bottom board; the positioning hole 2 and the metal detection point 4 are both arranged on one side of the bottom plate close to the FPC plugging finger; the positioning holes 2 are formed in the second side, close to the FPC inserting finger 1, of the bottom plate, and the two groups of metal detection points 4 are respectively arranged on the two opposite first sides, close to the FPC inserting finger 1, of the bottom plate.
It should be noted that two opposite first sides of the FPC plugging fingers are two sides of the FPC plugging fingers; the second side of the FPC plug-in finger is the front side of the FPC plug-in finger.
Specifically, referring to fig. 3, the group of metal detection points includes two metal detection points, which are PAD in the figure, and the two metal detection points PAD are connected by an anti-deflection line.
Furthermore, each anti-deviation line 3 is an independent line.
It should be noted that the anti-deviation wires 3 are all independent wires, that is, each anti-deviation wire 3 is not connected to other conductive layers on the FPC board, so as to ensure the uniqueness of the current path.
Further, the anti-deviation line 3 is of a bending structure, and one section of the anti-deviation line 3 is parallel to the FPC plug-in finger 1.
Further, the line width of the anti-deviation line 3 is set according to a preset deviation control tolerance.
Specifically, metal detection points 4 are connected through anti-deviation lines 3, in the electrical test process, probes are placed on the same group of metal detection points 4, and the anti-deviation lines 3 between the same group of metal detection points 4 form a unique passage; and the distance between the anti-washout line 3 and the FPC plug-in finger 1 is kept unchanged all the time in the blanking process, then:
if the passages among the same group of metal detection points 4 are not broken, namely the anti-deviation lines 3 are not broken, the FPC inserting finger 1 is not deviated in the blanking process or the deviation distance is within a tolerance range;
if an open circuit exists between the same group of metal detection points 4, namely the anti-deviation line 3 is broken, it indicates that the FPC plugging finger 1 deviates in the blanking process and the deviation distance exceeds the tolerance range; therefore, the line width of the anti-deviation line represents deviation tolerance;
for example, the distance between the deviation-preventing line and the inserting finger is 0.2mm, the deviation control tolerance is 0.5mm, and the line width of the deviation-preventing line is set to be 0.3mm.
The anti-deviation line is an independent line and is not connected with the FPC plug-in finger, so that the anti-deviation line cannot form a loop with the FPC plug-in finger, a secondary blanking process is not needed to be added to break the anti-deviation line, the testing process is simplified, and the testing efficiency is improved.
The second embodiment of the invention is as follows:
a method for testing an FPC board with inserted fingers preventing deviation from scouring is characterized in that the FPC board with inserted fingers preventing deviation from scouring is placed on a testing frame to realize conduction testing.
Specifically, the FPC board with the plug-in fingers preventing the deviation from occurring is placed on a test frame to realize conduction test after a plug-in finger blanking process;
in an optional implementation mode, after the parameters of the test jig are debugged, the first blanking is intentionally performed offset blanking to confirm whether the test jig can intercept the products with poor quality, and after the first product is confirmed, the FPC board with the plug-in fingers preventing the plug-in fingers from being deflected is subjected to batch testing and production.
In summary, according to the FPC board preventing the insertion fingers from deviating from the impact and the testing method thereof provided by the present invention, the plurality of metal detection points are arranged around the insertion fingers of the FPC, and the corresponding metal detection points are connected by the anti-deviating lines, when the insertion fingers of the FPC are subjected to an electrical test, the test probes can be quickly aligned to the metal detection points, whether the product blanking deviates or not can be judged only by the on-off of the anti-deviating lines in the testing process, no additional detection step needs to be performed by using detection equipment, the detection efficiency is improved, and the detection precision is high; and the anti-deviation line is an independent line, so that a loop can not be formed by the plug-in finger of the FPC, and after blanking is completed, the anti-deviation line is not required to be broken by adding a secondary blanking process, so that the testing process is simplified.
The above description is only an embodiment of the present invention, and not intended to limit the scope of the present invention, and all equivalent changes made by using the contents of the present specification and the drawings, or applied directly or indirectly to the related technical fields, are included in the scope of the present invention.

Claims (10)

1. An FPC board for preventing plug-in fingers from deviating is characterized by comprising an FPC board to be tested;
the FPC board to be tested comprises FPC inserting fingers, a positioning hole, at least one anti-deviation line and a plurality of metal detection points;
the positioning hole is arranged on the periphery of the FPC plugging finger;
the metal detection points are arranged on the periphery of the FPC plugging finger in a grouping mode and do not coincide with the positioning holes;
the anti-deviation lines are respectively connected with each group of metal detection points.
2. The FPC board of claim 1, wherein the positioning holes are disposed on two first sides of the FPC plugging finger opposite to each other, and the group of metal detection points are disposed on a second side of the FPC plugging finger;
the number of the metal detection points in one group is two.
3. The FPC board for preventing deviation of inserted fingers from being stamped according to claim 2, wherein the number of the deviation preventing lines is one; and two ends of the anti-deviation line are respectively connected with the metal detection points of the same group.
4. The FPC board of claim 1, wherein the positioning holes are disposed on a second side of the FPC plugging fingers, and the two sets of metal detection points are disposed on two opposite first sides of the FPC plugging fingers respectively;
the number of the metal detection points in one group is two.
5. An FPC board according to claim 4, wherein the distances between two sets of metal detection points and the FPC plugging fingers are the same.
6. The FPC board capable of preventing inserted fingers from deviating as claimed in claim 4, wherein the number of the deviation-preventing lines is two; and two ends of each anti-deviation line are respectively connected with the metal detection points in the same group.
7. An insertion finger anti-deflection FPC board according to claim 3 or 6, wherein each anti-deflection line is an independent line.
8. The FPC board of claim 1, wherein the anti-deviation line is of a bent structure, and one section of the anti-deviation line is parallel to the FPC plugging finger.
9. The FPC board of claim 1, wherein a line width of the anti-deviation line is set according to a preset deviation control tolerance.
10. A method for testing an FPC board with inserted fingers prevented from deviating, which is characterized in that a conduction test is realized by placing the FPC board with inserted fingers prevented from deviating on a test frame according to any one of claims 1-9.
CN202211165289.3A 2022-09-23 2022-09-23 FPC board capable of preventing plug-in fingers from deviating and testing method thereof Pending CN115604909A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202211165289.3A CN115604909A (en) 2022-09-23 2022-09-23 FPC board capable of preventing plug-in fingers from deviating and testing method thereof

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202211165289.3A CN115604909A (en) 2022-09-23 2022-09-23 FPC board capable of preventing plug-in fingers from deviating and testing method thereof

Publications (1)

Publication Number Publication Date
CN115604909A true CN115604909A (en) 2023-01-13

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Family Applications (1)

Application Number Title Priority Date Filing Date
CN202211165289.3A Pending CN115604909A (en) 2022-09-23 2022-09-23 FPC board capable of preventing plug-in fingers from deviating and testing method thereof

Country Status (1)

Country Link
CN (1) CN115604909A (en)

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