JP3696418B2 - Electrical component inspection socket - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an electrical component inspection socket used for inspecting the display quality of a display panel such as a liquid crystal display panel, an electroluminescence panel, or a plasma display panel, or inspecting an electrical component such as a semiconductor integrated circuit (IC) operation check. About.
[0002]
[Prior art]
In general, various display panels such as an electrical component such as a liquid crystal display panel, an electroluminescence panel, and a plasma display panel have a large number of electrode portions on a substrate. Therefore, in the manufacturing process of the display panel, the display panel before the peripheral circuit connection such as the driving IC tab is inspected for a display defect portion, a display quality, and the like. When inspecting the display or performance of this type of display panel, an electrical component inspection socket having a contact terminal called a display panel inspection socket for supplying driving power to the display panel is used. .
[0003]
In such an electrical component inspection socket, the drive signal supply form to the electrode terminal varies depending on the type of electrical component and the inspection purpose, so it is necessary to route the wiring to the contact terminal according to the inspection purpose etc. . In order to facilitate the design and manufacture of such an electrical component inspection socket, a contact terminal is formed on a flexible film, and another conductor pattern and its surface are partially covered on an extension of the contact terminal. It is desirable to form a three-dimensional circuit using an insulating film.
[0004]
Here, the connection state between the contact terminal 33 on the flexible film 32 and the conductive pattern 34 in the conventional electrical component inspection socket 31 will be described. FIG. 7 shows a state before both are connected, and FIG. The state after connecting is shown. As shown in FIG. 7, a plurality of contact terminals 33 are arranged on the flexible film 32 at predetermined pitch intervals so as to extend in the direction perpendicular to the paper surface. The conductive pattern 34 is formed on the flexible film substrate 35 so as to correspond to the above. The contact terminal 33 and the conductive pattern 34 are connected via an anisotropic conductive sheet 36. The anisotropic conductive sheet 36 is a film sheet having conductivity in the thickness direction and having insulation in the surface direction, and connects the contact terminals 33 and the conductive pattern 34 by thermocompression bonding.
[0005]
As shown in FIG. 8, when the contact terminal 33 and the conductive pattern 34 are connected by thermocompression bonding of the anisotropic conductive sheet 36, a signal transmitted from a signal input unit (not shown) is anisotropic from the conductive pattern 34. It is transmitted to each contact terminal 33 through the conductive particles 36a of the conductive conductive sheet 36 so that a desired inspection of the electrical component can be performed.
[0006]
[Problems to be solved by the invention]
However, in the conventional electrical component inspection socket 31, it is difficult to connect the contact terminal 33 on the flexible film 32 and the conductive pattern 34 on the flexible film substrate 35 without misalignment, As shown in FIG. 9, when the connection position between the contact terminal 33 and the conductive pattern 34 is shifted, the conductive pattern 34 comes into contact with another contact terminal 33 adjacent to the predetermined contact terminal 33 and short-circuits. There was a case. Such a phenomenon has been a problem because the quality and reliability of the electrical component inspection socket 31 are significantly impaired.
[0007]
The present invention has been made in view of the above points, and can easily connect the contact terminal on the flexible film and the wiring such as the conductive pattern by preventing the displacement, and the connection position between the two. It is an object of the present invention to provide an electrical component inspection socket capable of preventing the wiring from contacting other contact terminals and causing the wirings to become short-circuited even if they are misaligned.
[0008]
[Means for Solving the Problems]
In order to achieve the above-mentioned object, the electrical component inspection socket according to claim 1 of the present invention is characterized in that either one of the contact terminal or the wiring at the connection position has both edges thereof. the top surface or the displacement prevention insulating film in a predetermined range except for the central portion of the upper surface of the wiring of the contact terminals to form a between, formed by sleep weight to the edge of the positional deviation preventing insulating film It is not that parts of the height is high is formed than the other part is, either the width of the displacement prevention insulating film wherein contact is formed by sleep weight to edge terminals or the wire It is in the point formed larger than the self-interval width. And by adopting such a configuration, the insulation film for preventing misalignment exists between other contact terminals that should not be connected to the desired wiring, and the wiring is short-circuited because the current is cut off. Can be prevented.
[0009]
Further, the electrical component inspection socket according to claim 2 is characterized in that, in the wiring according to claim 1, the gap between the insulating films for preventing misalignment formed on both edges of the contact terminal or the wiring is the wiring partner. Or it is in the point formed substantially the same as the width of the contact terminal. And by adopting such a configuration, the displacement prevention insulating film on the contact terminal or on the wiring guides the contact terminal or wiring to which the connection is made to the contact terminal or the connection surface of the wiring to prevent the displacement. Thus, connection positioning can be performed reliably.
[0010]
Further, the electrical component inspection socket according to claim 3 is characterized in that in claim 1 or claim 2, the insulating film for misalignment prevention is disposed adjacent to the contact terminal or the wiring from one edge on the wiring through the substrate. The contact terminal or the edge of the wiring is formed in a substantially concave cross section. By adopting such a configuration, it is possible to easily form the misalignment prevention insulating film on the contact terminal or the wiring by etching or the like.
[0011]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described below with reference to FIGS.
[0012]
As shown in FIG. 1 and FIG. 2C, a liquid crystal display panel 1 as an electrical component has a substrate 2 and a liquid crystal display portion 3 formed on one side thereof, and a large number of electrode terminals 4 are provided on the substrate 2. Are arranged along the side of the liquid crystal display unit 3.
[0013]
As shown in FIG. 1 and FIGS. 2A to 2C, the electrical component inspection socket 5 is a flexible film 6 (see FIG. 2A) made of a resin such as polyimide or polyester and a glass substrate. 7 (see FIG. 2B), and the flexible film 6 and the glass substrate 7 are overlapped with an anisotropic conductive sheet 8 (see FIG. 1) interposed therebetween.
[0014]
In correspondence with the arrangement of the electrode terminals 4 formed on the liquid crystal display panel 1, a large number of contact terminals 9 are arranged on one end of one side of the flexible film 6. A signal input unit 10 is formed on the other side of the one side. In the present embodiment, four signal input units 10 are formed corresponding to the four signals supplied to the liquid crystal display panel 1. Each contact terminal 9 has a contact portion 9a that contacts the electrode terminal 4 and an extended end portion 9b that extends from the contact portion 9a. In the present embodiment, the contact portions 9 a and the extended end portions 9 b of the contact terminals 9 are arranged at the same pitch as the electrode terminals 4.
[0015]
On the other hand, as shown in FIG. 2B and FIGS. 3A to 3C, on one side of the glass substrate 7, wiring 15 for connecting to the extended end portion 9b of the contact terminal 9 and the signal input portion 10 is provided. Is formed around.
[0016]
The wiring 15 will be described in more detail. As shown in FIG. 3A, a conductor pattern 16 is formed on one surface of the glass substrate 7 corresponding to the arrangement of the extended end portions 9b of the contact terminals 9. In addition, two lead patterns 17 extending in parallel with the conductor pattern 16 are formed on both sides of the arrangement section of the conductor pattern 16. The conductor pattern 16 has a connection portion 16a that overlaps the extended end portion 9b of the contact terminal 9 when the flexible film 6 and the glass substrate 7 are overlapped. The lead pattern 17 has an extended end portion 17 a that overlaps the end portion of the signal input portion 10 when the flexible film 6 and the glass substrate 7 are overlapped.
[0017]
In FIG. 2 and FIG. 3, there are 17 electrode terminals 4 and contact terminals 9 for each module, but this is schematically shown for ease of illustration and explanation. Actually, the number of electrode terminals 4 in module units and the number of contact terminals 9 formed on the flexible film 6 are larger, but the number of electrode terminals 4 and contact terminals 9 is the gist of the present invention. It is irrelevant and is not limited to the illustrated example.
[0018]
The conductor pattern 16 and the lead pattern 17 are formed by forming an aluminum (Al) layer on the front surface of the glass substrate 7 by vapor deposition or the like and then etching the aluminum layer into the pattern shape shown in FIG. It is formed on the glass substrate 7. Preferably, metal plating having excellent corrosion resistance, for example, two-layer plating composed of a nickel base plating layer and a gold plating layer on the surface thereof is applied to the surfaces thereof. The conductor pattern 16 and the lead pattern 17 may be formed of a conductive material such as ITO in addition to aluminum.
[0019]
Thereafter, an insulating film 19 that partially covers the conductor pattern 16 and the lead pattern 17 is formed in the hatched area indicated by reference numeral 18 in FIG. This insulating film 19 is preferably made of a resist film. The insulating film 19 is formed with an opening 19 a for exposing a part of the conductor pattern 16 and the lead pattern 17.
[0020]
Further, as shown in FIG. 4, between the upper edges of the connecting portions 16a of the conductive pattern 16, that is in a predetermined range except between two upper edge portions of the contact terminal 9 side connected to the connecting portion, A misalignment prevention insulating film 20 is formed to prevent misalignment with the extended end portions 9b of the contact terminals 9. Here, the place fixed range misalignment preventing insulating film 20 that have been formed, which mainly comprises an upper surface portion of the glass substrate 7 the connecting portion 16a is not formed, the end of the predetermined range position, the spacing of the end portions of the predetermined range adjacent to each other, are a width substantially the same distance position of the extending end portion 9b of the contact terminal 9 is connected partner Te the connecting portion 16a on the smell Moreover, even if the position of the edge part of the said predetermined range shifts | deviates the position of the said extended edge part 9b on the said glass substrate 7, it is the connection part which adjoins through the conductive particle 8a of the said anisotropic conductive sheet 8 16 is set within a range that does not energize 16 . In the present embodiment, each misalignment prevention insulating film 20 is adjacent to each other from the upper edge portion of each connection portion 16 on the glass substrate 7 in consideration of the ease of pattern formation by etching or the like. A cross-sectional concave shape is formed over the upper edge of the connecting portion 16.
[0021]
In the present embodiment, the misalignment prevention insulating film 20 is formed on the conductive pattern 16 side that is the wiring 15. However, since this becomes a high temperature when the misalignment prevention insulating film 20 is formed, heat is generated. It is because it is considered that it is more preferable to form it on the glass substrate 7 side which is strong to the surface, and it is not necessary to limit to this in particular. If deformation due to high temperature is not so much a problem, the contact terminal on the flexible film 6 side Similarly to the connection portion 16, the misalignment prevention insulating film 20 may be formed in a predetermined range on the extended end portion 9 b of the base plate 9.
[0022]
Further, in the present embodiment, each extension end portion 17a of the lead pattern 17 is less likely to be short-circuited between the extension end portions 17a than the conductive pattern 16 side. Although the prevention insulating film 20 is not formed, if necessary, the misalignment prevention insulating film 20 may be formed on both upper edge portions of the extended end portions 17a.
[0023]
Note that the width of each connection portion 16a of the conductive pattern 16 is an extension of the contact terminal 9 in consideration of forming the interval of the displacement preventing insulating film 20 to the width of the extension end portion 9b of the contact terminal 9. A width larger than the width of the end portion 9b is formed.
[0024]
Furthermore, it is preferable that the misalignment preventing insulating film 20 is formed with a thickness of 1 to ₂ μm as a SiO ₂ film or an Al ₂ O ₃ film. If the insulating film 20 for preventing displacement is formed on the flexible film 6 instead of the glass substrate 7, the insulating film for preventing displacement is considered in consideration of the properties of the flexible film 6. No. 20 may be formed as a color resist film for liquid crystal with a thickness of about 2 μm, or may be formed as a polyimide film with a thickness of about 1 μm. Note that the color resist film and the polyimide film can also be applied when the insulating film 20 for preventing displacement is formed on the glass substrate 7 side.
[0025]
On the other hand, as shown in FIG. 3C, a connection pattern 21 for selectively connecting the conductor pattern 16 and the lead pattern 17 is formed on the insulating film 19. The connection pattern 21 is made of, for example, silver paste. In the present embodiment, four connection patterns 21 are formed on the insulating film 19 corresponding to the four signals supplied to the liquid crystal display panel 1. Each connection pattern 21 extends in a direction intersecting the conductor pattern 16 and the lead pattern 17, and is connected to the conductor pattern 16 and the lead pattern 17 at the opening 19 a of the insulating film 19. In the present embodiment, two of the 17 conductor patterns 16 at both ends are for the common electrode, and are connected to the left end of the lead pattern 17 for the common electrode (see FIG. 3B) via the connection pattern 21. Connected lead pattern). The remaining conductor pattern 16 is for electrodes according to the colors corresponding to the three colors of red (R), green (G), and blue (B) of the liquid crystal display panel 1, and three connections are made for the three colors. Each is connected to the lead pattern 17 via the pattern 21 for use.
[0026]
Thereafter, as shown in FIG. 1, the flexible film 6 and the glass substrate 7 are overlapped with an anisotropic conductive sheet 8 interposed therebetween. Thereby, the extended end part 9b of the contact terminal 9 and the connection part 16a of the conductor pattern 16 are electrically connected through the anisotropic conductive sheet 8, respectively. Further, the extended end portion 17 a of the lead pattern 17 and the signal input portion 10 are electrically connected via the anisotropic conductive sheet 8, respectively.
[0027]
Next, the operation of this embodiment will be described.
[0028]
In the electrical component inspection socket of the present embodiment, as shown in FIG. 5, the extended end portion 9b of the contact terminal 9 on the flexible film 6 and the connection portion 16a of the conductor pattern 16 on the glass substrate 7 are provided. When connecting, the displacement prevention insulating film 20 is positioned so as to guide the edge in the width direction (left and right direction in FIG. 5) of the extended end portion 9a of the contact terminal 9 to the upper surface of the connection portion 16a. . At this time, the conductive particles 8a of the anisotropic conductive sheet 8 exist between the extended end portion 9b of the contact terminal 9 and the connection portion 16a, and a signal from the signal input portion 10 is transmitted via this. Transmission to the electrode terminal 4 of the liquid crystal display panel 1 is possible.
[0029]
If the insulating film 20 for preventing displacement is formed also on the extended end portion 17 a of the lead pattern 17 on the glass substrate 7, the signal input portion 10 on the flexible film 6 and the glass substrate 7 are formed. When connecting to the extended end portion 17 a of the upper lead pattern 17, the position shift preventing insulating film 20 is positioned so as to guide the edge in the width direction of the signal input portion 10 to the upper surface of the signal input portion 10. To do. Then, both of them can be energized through the conductive particles 8 a of the anisotropic conductive sheet 8 between the signal input portion 10 and the extended end portion 17 a of the lead pattern 17.
[0030]
On the other hand, as shown in FIG. 6, the position of the extended end portion 9 b of the contact terminal 9 and the connection portion 16 a may be shifted due to the guide of the displacement prevention insulating film 20, or the signal input portion 10 and the lead pattern 17 may be Even if the position with respect to the extended end portion 17a is shifted, the insulating film 20 for preventing the position shift exists between them, so that the distance from the other connection partner that should not be connected can be kept large. It has become difficult. Furthermore, the displacement-preventing insulating film 20 formed at the edge of the connection portion 16a or the extended end portion 17a is between the other connection partner that should not be connected and the conductive particles 8a of the anisotropic conductive sheet 8. Therefore, the conductive particles 8a are prevented from coming into direct contact with the other party, so that it is difficult to cause a short circuit.
[0031]
Therefore, according to the embodiment of the present invention, the displacement of the contact terminals 9 on the flexible film 6 and the conductive pattern 16 can be prevented and easily connected by the guide of the displacement preventing insulating film 20. At the same time, even if the connection position between the two is shifted, the insulating film 20 for preventing the position shift exists so as to cut off between them, and the conductive pattern 16 is energized with the other contact terminals 9 to cause a short circuit. Can be prevented.
[0032]
In addition, this invention is not limited to each said embodiment, A various change can be made as needed. For example, for the substrate on which the wiring 15 such as the conductive pattern 16 is formed, the heat-resistant glass substrate 7 is used in consideration of heat generation in forming the insulating film 19 and the misalignment preventing insulating film 20. Not limited to this, a flexible film substrate (FPC or TAB) can also be used.
[0033]
【The invention's effect】
As described above, according to the electrical component inspection socket according to the first aspect of the present invention, the insulation film for preventing misalignment exists between the other contact terminals that should not be connected to the desired wiring and is energized. Therefore, it is possible to prevent the wires from being short-circuited.
[0034]
According to the electrical component inspection socket of claim 2, in addition to the effect of the invention of claim 1, the contact terminal on which the insulating film for preventing displacement on the contact terminal or the wiring is the connection partner Alternatively, the wiring can be guided to the contact terminal or the connection surface of the wiring to prevent the displacement and the connection positioning can be reliably performed.
[0035]
According to the electrical component inspection socket of claim 3, in addition to the effect of the invention of claim 1 or 2, the misalignment prevention insulating film is formed on the contact terminal or the wiring by etching or the like. Can be easily formed.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view showing a usage state in which a contact terminal of an electrical component inspection socket according to an embodiment of the present invention is brought into contact with an electrode terminal of a liquid crystal display panel, which is an electrical component. The structure and manufacturing process of such an electrical component inspection socket are shown. (A) is a plan view of a flexible film, (b) is a perspective plan view of a glass substrate, and (c) is a completed electrical component inspection socket. It is a partially omitted perspective plan view showing a state.
3 (a), (b), and (c) are a conductor pattern, a lead pattern, an insulating film, a misalignment preventing insulating film, and a connection pattern on the glass substrate of the electrical component inspection socket shown in FIG. It is a perspective top view which shows a formation process.
4 is a side view showing a state before the glass substrate and flexible film of the electrical component inspection socket according to the embodiment of the present invention are overlaid. FIG. 5 is a side view of the glass substrate and the flexible film in FIG. FIG. 6 is a side view showing a state after overlapping the glass substrate. FIG. 6 is a side view showing a state when the connection position between the glass substrate and the flexible film is displaced in the electrical component inspection socket of the present invention. FIG. 8 is a side view showing a state before a substrate and a flexible film are overlaid on a conventional socket for electric component inspection. FIG. 8 is a diagram after a substrate and a flexible film are stacked on a conventional socket for electric component inspection. FIG. 9 is a side view showing the state when the connection position between the glass substrate and the flexible film is shifted in a conventional socket for inspecting electrical components.
DESCRIPTION OF SYMBOLS 1 Liquid crystal display panel 4 Electrode terminal 5 Electrical component inspection socket 6 Flexible film 7 Glass substrate 8 Anisotropic conductive sheet 9 Contact terminal 15 Wiring 16 Conductive pattern 17 Lead pattern 20 Insulation film for preventing misalignment

Claims (3)

It has a flexible film in which contact terminals for connecting to a plurality of electrode terminals of an electrical component are arranged, and a wiring for selectively guiding a signal to the contact terminals is formed on the substrate. In the electrical component inspection socket for connecting the contact terminal and the wiring via the anisotropic conductive sheet by overlapping the flexible film via the anisotropic conductive sheet, the socket at the connection position Either one of the contact terminal and the wiring is formed with an insulating film for preventing misalignment in a predetermined range between both edges and excluding the upper surface of the contact terminal or the center of the upper surface of the wiring , It said edge weight values height parts component that is formed in part of the displacement preventing insulating film is high is formed than the other part, forming the displacement prevention insulating film is sleep weighs the edges Said contact being Child or any one of a width of the wiring electric part socket for inspection, characterized in that it is formed larger than the self-interval width.   The distance between the misalignment prevention insulating films formed on both edges of the contact terminal or the wiring is formed to be substantially the same as the width of the wiring or the contact terminal which is a connection partner. The electrical component inspection socket according to 1.   The misalignment prevention insulating film is formed in a substantially concave shape in cross section from one edge of the contact terminal or the wiring to the edge of the contact terminal or the wiring adjacent to the contact terminal or the wiring. The socket for electrical component inspection according to claim 1 or 2.

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