TW581871B - Probe card for testing liquid crystal display - Google Patents

Abstract

That supporting needle plate by reducing the insert thickness of needle plate to save cost and makes product microminiaturization. Especially the test efficiency of the character of liquid crystal display can be enhanced by protect connect part of needle plate for contact circuit pattern stably. The probe card for testing a liquid crystal display is consisted of an assembly holder, a substrate holder is connected and fixed at one side of the bottom surface of the assembly holder, a needle holder is connected and fixed at another side of the bottom surface of the assembly holder in opposition to the substrate holder, a circuit substrate with driver IC thereon is sticked on the bottom surface of the substrate holder, a guide plate sticked at the bottom surface of the needle holder is consist of a plurality of needle insert trench formed on the upper surface and an align trench formed at the outer surface of two side and parallel to the needle insert trench and is formed through the needle insert trench, and a needle plate inserted to the needle trench of guide plate is flexible at two end, one end of the needle plate is through the guide hole formed on the guide plate to form an LCD connect end, the another end of the needle plate is stand out the upper surface of guide plate to form substrate connect end, and the needle plate connect to the outside surface of the needle holder is stand out the upper surface of back end of needle holder to form a salient.

Description

581871 V. Description of the invention (1) Field of the invention The present invention relates to a detection card for testing a liquid crystal display device (Li c uid Crysta 1 D isp 1 ay, LCD), and in particular to a method for reducing the size of a stylus. The insertion thickness of the plate reduces the thickness of the silicon material guide plate that supports the styli plate, and saves manufacturing costs while promoting the thinning of the probe card; especially by stably protecting the styli plate that contacts the circuit pattern An LCD inspection probe card that can improve the efficiency of LCD performance inspection at each connection end. BACKGROUND OF THE INVENTION Generally speaking, as an image display device such as a small television and a notebook computer, an LCD (Liquid Crystal Display Device) is mainly used, and an edge portion of the LCD is provided with a high density for applying electrical signals (such as image signals, synchronization, etc.). Letter C, hue signal, etc.) dozens or even hundreds of connection terminals. Before such an LCD is installed in a product, it performs a picture display inspection to check whether the test picture is bad by applying an experimental signal. A component included in such a device for testing the electrical characteristics of the LC is a detection card. The probe used in the conventional method has a stylus with a metal wire. Since the stylus is fixed by epoxy resin, the reduction of the outer diameter of the stylus is limited. The problem points corresponding to the highly accumulated pattern trend. That is, the mounting surface of the styli base with the styli installed will be limited. Due to the high accumulation of LCD, the number of connection terminals will be very large and very dense. Make it tightly aligned

581871 V. Description of invention (2) When quantity is impossible. For this reason, many structures have been proposed that can reduce the outer diameter of the stylus and improve the structure that supports the stylus. On the other hand, even for the applicant, Japanese Patent Application No. 200 Patent cases No. 1-3 2 1 1 7 and No. 2 0 1-3 2 1 1 8 In the invention previously applied by the present applicant, a styli has been proposed. The styli are formed of a thin plate-like plate using wafer processing technology, and have a structure capable of greatly reducing the outer diameter. That is, a plurality of styli having a desired shape are patterned on a thin-plate-shaped silicon plate, and a plurality of styli are simultaneously produced. However, in the applicant's invention, since the main purpose is to reduce the outer diameter of such styli, a problem arises that the so-called styli plate and the structure that supports most styli become more complicated. In addition, there are also uneconomic problems caused by rising manufacturing costs caused by complicated structures and manufacturing procedures. For this reason, recently, the inventor has proposed a method for simultaneously connecting a pattern of an LCD and a pattern of a circuit substrate in a patent application No. 2000-1-5 2 4 3 3 filed on August 29, 2001. By minimizing the length between the connection terminal on the LCD side of the styli board and the connection terminal on the substrate side, miniaturization and accumulation are promoted, and the guide plate supporting the styli board is simply mounted on the styli It can be more easily manufactured and assembled. That is, as shown in Fig. 6, the structures of the assembly base 1, the base base 2, the stylus base 3, and the circuit board 4 are substantially the same as those of the present. In this structure, a guide plate 5 is provided at the bottom of the stylus holder 3,

581871 V. Description of the invention (3) The above guide plate 5 is formed to be open at a certain interval in the width direction and recessed downward at a certain depth, and at the same time, the tip of the front end portion of the stylus holder 3 can be a certain length. The stylus penetrating perpendicularly is inserted into the groove 5 a. Furthermore, the stylus plate 6 inserted into the stylus insertion groove 5 a of the guide plate 5 is extended downward from one end into an “L π” shape, and the extended end has a lifting elastic force that protrudes forward from the front end of the stylus holder 3. The upper end of the LCD connection end 6a and the other end are extended to the bottom of the circuit board 4, and the extended end part is formed by patterning a thin plate-shaped stone board composed of the substrate connection end 6b that contacts the circuit pattern of the circuit board 4. Problems to be Solved by the Invention However, in this structure, the thickness of the guide plate 5 becomes excessively thick, and in order to make the two guide plates 5 form a stacked layer structure by joining, the operation becomes difficult. It is too complicated and inconvenient. Especially when the stylus insertion groove 5 a is formed on the guide plate 5, the machining depth (about 50 0 // m) is too deep, so there is a so-called processability confirmed by a microscope. It is an inaccurate problem. That is, the depth seen through a microscope is about 17 0 to 3 0 0 // m, because a depth of about 5 0 0 // m is formed in the above structure, so Processing stylus insertion groove 5 d Therefore, it is impossible to accurately check the degree of processing. Therefore, the state of the setting surface of the stylus insertion groove 5 a cannot be accurately recognized, so that the insertion state of the stylus plate 6 becomes uneven and the assembly state is poor. In the claimed invention, since the LCD connection end 6 a of the stylus plate 6 and the substrate connection end 6 b have both side ends of the guide plate 5 facing outward,

581871 5. Description of the invention (4) The side is completely open, so that the so-called stylus plate 6 connection ends 6 a and 6 b may be deformed to cause contact failure. SUMMARY OF THE INVENTION An object of the present invention is to provide a thinning of the thickness of a guide plate and a thickness of a stylus insertion groove that can be recognized with a microscope, and a stylus plate having the same width as the depth of the insertion groove of the stylus. Ultra-thin and correctly assembled LCD detection card for inspection. An object of the present invention is to provide a detection card for an LCD inspection, which can prevent the deformation of the L C D image connection end and the substrate connection end by closing the front ends of both sides of the stylus insertion groove. The present invention provides another unit price of goods manufactured by saving material costs. Reduced, and can be applied to more economical LCD high-accumulation pattern LCD inspection probe card. In order to achieve this purpose, the structure of the present invention is an assembly base; a substrate base connected to one side of the bottom surface of the assembly base; and a styli corresponding to the substrate base and connected to the other side of the bottom surface of the upper assembly base. A base connected to the bottom surface of the substrate holder and having a circuit board for driving 1C on the upper surface; provided with a majority of the bottom surface of the stylus holder which is uniformly open upward and recessed downward in a single direction on the upper surface Guide plates with long hole-shaped stylus insertion grooves, alignment grooves formed on the outer end surfaces on both sides of the same horizontal line as the stylus insertion grooves, and one end of the front end side of the stylus insertion grooves penetrating downward: The stylus inserted into the above guide plate is inserted downwards, and both sides are formed to be able to flex and deform upwards and downwards, and an end portion on one side is extended downward, and a guide hole formed through the front end portion of the above guide plate is penetrated downward and is larger than the above. guide

Page 10 581871 V. Description of the invention (5) The LCD connection end formed by protruding downward to the bottom surface of the board, and the other end of the substrate connection end formed by protruding upward from the above guide plate. The upper surface of the rear end portion side of the seat is constituted by a stylus plate which protrudes upward from the hook protrusions closely contacting the side surface of the stylus seat. In order to make the above-mentioned objects, features, and advantages of the present invention more comprehensible and easy to understand, a preferred embodiment is given below, and in accordance with the accompanying drawings, the detailed description is as follows: Marking description of the drawings: 10 Assembly base 20 Substrate base 3 1 Stylus holder 40 Circuit board 50 Guide plate 5 1 Stylus insertion groove 52 Guide hole 53 Calibration groove 54 Cushioning member 60 Stylus plate 70 LCD (liquid crystal display) Detailed description of the preferred embodiment The following is about the embodiment of the present invention Please refer to the drawings for a detailed description. The present invention is characterized in that the guide plate has a silicon plate made of the same material as a conventional wafer and is thinned at the same time.

581871 V. Description of the invention (6) Obtain the stylus insertion mirror for identification and prevent the deformation of the insertion curve. According to the present invention, one side is connected to the solid groove, and the depth of the stylus insertion groove is formed to a degree, and the microscopic degree of the connection between the two end sides of the stylus plate of the processing needle insertion groove of the stylus insertion groove can be checked. Tip scratch

It is equipped so that the styli of the same type as the material have been lifted off from the fixed substrate. The IC styli base 30 is now more similar to this structure with a non-insulating film for the base styli base 30. However, the guide plate 50 of this guide plate is changed less than 60, and the detailed invention of the invention is made of a rigid needle holder 30. In addition, the probe base 20 is thick (the base plate 20 is not fixed as shown in the first figure). Compare with the base plate 20 and test the base plate material 20, but this is ideal. With the applicant's bottom surface of the assembly base 10 and the assembly base 10, and the other side corresponding to the base plate 20 The needle holder 30 is made of insulating material, and its rigidity is even more required, so it is also possible to use the probe card in the proposed invention on the bottom surface of the probe holder 30. It is thinly shaped. It is shaped like that, and it has the thickness of the pin base 30 of the base plate 10, as shown in the previous application. It can be explained that the bottom surface of the body support connection base 〇 differs from the base and the electro-eye invention is different. By promoting the overall thinning, the structure of the building detection card is assembled in the present invention, and the substrate is fixed on the bottom surface of the assembly base 10. Similarly, the base plate 20 corresponding to the base plate 20 made of an insulating material is further extended downward and the other side is connected to the base plate 40 on the bottom surface of the base plate 20. For example, when the silicon material is prevented from having an image seat 20, and even the formation of the

Page 12 581871 V. Description of the invention (7) Therefore, one end of the circuit substrate 40 is connected to the bottom surface of the substrate holder 20, and a circuit pattern electrically connected to the printed circuit is formed on the bottom surface of the circuit substrate 40 with B. On the other hand, it is more desirable to use a flexible substrate for the circuit substrate 40. The guide plate 50 is next to the bottom surface of the stylus holder 30, and at the same time, is located directly below the substrate holder 20. As shown in FIG. 2, the guide plate 50 includes a plurality of stylus insertion grooves 51 which are formed at a predetermined interval in the width direction and are opened upward and recessed downward with a predetermined depth. At this time, the thickness of the stylus insertion groove 51 can be formed to a thickness of 200 / zm to 300 // m by confirming the processing characteristics through a microscope, and preferably a thickness of 300 // m. ^ In addition, as shown in FIG. 2, the stylus insertion groove 5 1 is provided with a vertically penetrating guide hole 5 2 at a tip portion located on the front end side of the stylus holder 30. In particular, the stylus insertion groove 51 of the guide plate 50 is processed into a state in which both ends are closed, and outer end portions are formed on both sides. This structure is different from the structure of the previously applied invention. On the outer side surface of such an outer end portion, it is preferable that calibration grooves 53 are provided on the same horizontal lines as the stylus insertion grooves 51, so that the positions of the stylus insertion grooves 51 can be clearly known. In addition, the bottom portion of the front end portion of the LCD pattern side of the guide plate 50 is provided with a cushioning member 54 as shown in FIG. 2, and the cushioning member 54 is preferably extended slightly downward from the bottom surface of the guide plate 50. As the material of the buffer member 54, ceramic wires are used.

Page 13 581871 V. Description of the invention (8) To use tungsten metal wire. On the other hand, as is known, the guide plate 50 may be formed by combining only two silicon plates with the same thickness as the depth of the stylus insertion groove 51, but 1 is more preferably made of one silicon plate with the same thickness. Easy. The stylus plate 60 is inserted into the stylus insertion groove 5 丨 formed on the guide plate 50 to form a structure for electrically connecting the LCD-side circuit pattern and the substrate-side circuit pattern, respectively. As shown in FIG. 3, the stylus plate 60 has a structure capable of being bent on both sides, and an L C D connection end 61 and a substrate connection end 6 2 are formed at the end portions of both sides, respectively. The LCD connection end 61 is extended downward from one end of the stylus plate 60, and passes through the guide hole 5 2 of the stylus insertion groove 5 丨 at the front end side of the guide plate 60, and extends from the guide plate 50. The bottom of the terminal is provided with a terminal connection portion protruding further downward. The ends on the sides of each of the connecting ends 6 1 and 6 2 of Yu 'are inserted into 1 and inserted into the groove 51, and the ends on both sides are made thinner than the central part so that they can flex up and down. The thickness of the bending deformation is ideal. The thickness of the central part inserted into the stylus insertion groove 51 is the same as that of the stylus insertion groove 51. On the other hand, the styli plate 60 is formed with an upper end that protrudes upward to tightly connect the end of the styli base 30 to the end of the base plate 20 side, and a hook protrusion can be tightly connected to the lower end of the side end surface of the styli base 30. 6 3. First, the connection end of the substrate of the stylus board 60 may be formed as shown in FIG. 4A. However, as shown in FIG. 4B,

Page 14 581871 V. Description of the invention (9) The corresponding bottom is extended downward, which can further prevent the cross-sectional area of the stylus from being inserted into the groove 5 i from expanding and flexing. In addition, as shown in FIG. 1, the bottom surface which is tightly connected to the styli plate 60 of the styli base 30 is formed with a recess in a part thereof. When the styli plate 60 is manufactured, the connecting styli plate is removed. After connecting the contacts 64 between 60, the remaining part is located in the above-mentioned recessed space 31 when epoxy resin is filled, so that a solid stylus board 60 can be fixed. In the probe card configured as described above, the stylus plate 60 is inserted downwardly into the stylus insertion groove 50 from the upper part of the guide plate 50. In this assembled state, a ring is used from the upper part of the guide plate 50. Oxygen resin styli holder 30. At this time, the stylus base 30 is tightly coupled to one side of the upper assembly base, and the substrate base is bonded to the other side, and the circuit board 40 is bonded to the bottom surface of the base base 20 at the same time. Therefore, if the guide plate 50 inserted into the styli plate 60 is joined to the styli base 30, the circuit pattern formed on the circuit board 40 will become the substrate connection end 6 of the styli base 60, respectively. status. In addition, since the end portion of the guide plate 50 on the substrate connection end 62 side is closed, when the guide plate 50 is combined with the stylus holder 30, the substrate connection end 62 of the stylus plate 60 is correctly connected to On the pattern of the circuit board 40, a calibration groove 53 formed on the outer surface of the stylus insertion groove 51 of the stylus board 50 on the same horizontal line can be observed and the joint position can be set correctly. And 'when using the probe card assembled in this way to check the electrical characteristics of the LCI), as shown in Figure 5, the LCD connection end 61 of the stylus board 60 is correctly connected to the circuit pattern of the LCD 70, On the L c D 7 〇 side of the detection card 5 〇

Page 15 581871 Fifth invention description (10) --- the outermost side surface of the end can also be connected to the groove 5 1 by the calibration groove 5 3 formed on the same horizontal line as above. . When the correct position of the stripe, especially the buffer member 54 on the outer side of the front end side of the guide plate 50, is manufactured in the LCD 70, it is possible to prevent the contact with The silicon material is not in direct contact with each other, and it is possible to prevent damage to the plate 50 caused by the damage of the guide plate 50. Sampling test card In addition, the overhanging protrusion 71 of the LCD 70 forms an excessively large connection between the T = LCD terminal 61 and the circuit pattern of 1 ^ 0, and has a function of detecting the product defect of the LCD 70. On the same day, the most significant feature of the present invention is that by using a microscope for forming the depth of the stylus insertion groove 51 inserted at dusk ::：, the depth of the workability of the insertion: 51 is sufficient. Perform the correct inspection: identify,

500, the previous application for the tenth invention is that the stylus is inserted into the groove at A: Γ; the degree of ΓΓ cannot be processed correctly to: In the state where the stylus plate is inserted, Method of uniform arrangement. This is caused by the contact state between the stylus board and the terminals due to the insertion state of the stylus board: JJ] circuit and LCD circuit pattern. The circuit pattern is not good for contact inspection. The result of the invention is not injured, and the further extension of the material t can use the electrical characteristics to prevent the damage of the detection card, which can make the test reliable: the Tm stably maintains the LCD $ greatly.

581871 V. Description of the invention (11) As described above, since the present invention has a thinning of the thickness of the probe card 50 and the stylus board 60 inserted in the probe card 50, the overall thickness is promoted. At the same time, the material cost can be saved for economical production, and the closed ends of both sides of the stylus insertion groove 51 can be formed, so that the connecting ends 6 formed by the both ends of the stylus plate 60 can be prevented. 1, 6 2 flex and deform to achieve the effect of stable connection with the circuit pattern. In addition, the present invention allows the depth of the stylus insertion groove 51 to be set to a degree capable of confirming the processing state with a microscope, because the stylus plate 60 can be uniformly arranged and connected stably to the electrical connection portion, so that the so-called The effect of further improving inspection reliability. In particular, the present invention prevents direct contact with the silicon material guide plate 50 when the detection card is connected to the LCD circuit pattern in advance, so it can prevent damage to the Pf, and can greatly improve product reliability and work efficiency. effect. Although the present invention has been disclosed as above with a preferred embodiment, it is not intended to limit the present invention. Any person skilled in the art can make some changes and retouch without departing from the spirit and scope of the present invention. The scope of protection of the invention shall be determined by the scope of the attached patent application.

581871 Brief Description of Drawings Fig. 1 is a side sectional view showing a detection card for an LCD inspection of the present invention. Fig. 2 is a perspective view showing a part of the guide plate of the present invention. Fig. 3 is a perspective view showing a stylus plate using the present invention. Fig. 4A and Fig. 4B are side sectional views showing the substrate connection ends of the styli plate of the present invention. FIG. 5 is a diagram showing a use state of the present invention. FIG. 6 is a side cross-sectional view showing a conventional detection card for LC detection.

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Claims (1)

581871 VI. Patent application scope 1. A detection card for LCD inspection, which is characterized by having: an assembly base; a base plate base connected and fixed on the bottom side of the assembly base; a styli base connected and fixed to the base A base plate corresponding to the other side of the bottom surface of the assembly base; a circuit board, then the bottom surface of the base plate, and a driving IC on the upper surface; a guide plate, provided with the bottom surface of the styli base, and The surface is uniformly formed in a single direction with a plurality of long-hole stylus insertion grooves that are open upward and recessed downward, and an alignment groove is formed on the outer end surfaces of both sides of the same horizontal line as the stylus insertion grooves, and these A tip end of the stylus insertion groove penetrates downward; and a stylus plate having a stylus insertion groove inserted downwardly into the guide plate, and both ends are formed to be flexibly deformable up and down, and an end on one side is formed. One of the LCD connection ends is formed by extending downwardly through a guide hole formed at the front end portion of the guide plate and protruding downward from the bottom surface of the guide plate, and the other end Projecting upwardly from the upper surface of the guide plate is formed with one end connected to the substrate in close contact with upwardly projecting side plates of the stylus at the upper side surface of the rear end portion of the stylus of a hooking plate projection formed. 2. The detection card for LCD inspection according to item 1 of the scope of patent application, characterized in that: a part of the bottom surface of the stylus plate tightly connected to the guide plate forms an upward depression, and a part of the stylus plate accommodates The formed connection points are bonded together using a charged epoxy. Page 19 581871 VI. Patent application scope 3. The detection card for LCD inspection according to item 1 of the patent application scope, characterized in that: on the guide plate, a buffer member is provided at the lower part of the outer peripheral surface on the front side. 4. The detection card for LCD inspection according to item 3 of the scope of patent application, wherein the buffer member is made of tungsten metal wire. 5. The detection card for LCD inspection according to item 3 of the scope of patent application, wherein the buffer member is made of ceramic. 6. The detection card for L C D inspection according to item 1 of the scope of patent application, characterized in that the stylus insertion grooves of the guide plate form a depth of 2 0 0 // m to 3 0 0 // m. 1 1 Page 20