TWM586030U - Flexible circuit board with hole check mark - Google Patents

Abstract

A flexible circuit board with a hole inspection mark is used to solve the problem that it is not easy and fast to perform a hole inspection of a conventional flexible circuit board. The system includes: a substrate with a plurality of blank areas; a circuit layer; a plurality of marks formed on the substrate together with the circuit layer, and the circuit layer and the plurality of marks are not located in the plurality of blank areas; Each of the punching holes corresponds to each of the blank areas penetrating the substrate; and a plurality of detection areas, each of which has at least one of the foregoing marks and one of the foregoing punching holes.

Description

Flexible circuit board with hole check mark

This creation is about a flexible circuit board, especially a flexible circuit board with a hole check mark.

With the advancement of technology, electronic products have become more and more popular, making our lives more convenient. Today, electronic products come in a variety of styles, and flexible circuit boards are small in size and can be bent, which is especially suitable for thin and light design electronics. Products, and has been widely used. In order to facilitate the accurate positioning of the flexible circuit board at a predetermined position in an electronic product, at least one mark is additionally provided when the flexible circuit board is manufactured, so that the flexible circuit board can be accurately installed by the auxiliary alignment of the at least one mark. When set to a predetermined position in an electronic product, in addition to improving the convenience of installation, the at least one mark can also be used for inspection or general measurement for positioning, to facilitate production control.

Following the above, the type of the mark provided on the flexible circuit board may be a punched hole or a copper block. Among them, since the copper block is formed together with the circuit layer on the flexible circuit board, the setting of the copper block There will be no risk of deviation in the position; but if the mark is a punch, the forming method is to send the semi-finished product of the flexible circuit board printed with the circuit layer into a punch to punch the punch, so the actual position of the punch There may be a slight error from the preset position, and whether the error falls within the allowable error range requires additional testing to determine, otherwise an excessive hole position error will cause the flexible circuit board cannot be accurately installed in the electronics The predetermined position in the product.

However, at present, the way to detect whether the actual position of the punching hole falls within the allowable error range is to find a special type of the circuit layer that is easy to align as a reference point for comparison, and use photosensitive coupling Component (Charge Coupled Device, CCD for short) lens for Automated Optical Inspection (AOI). However, the pattern of this circuit layer changes greatly, some circuit layers are easy to find reference points, some are not easy; or some parts that can be used as reference points are too far away from the punching hole. When the reference point and punching hole cannot be located on the same CCD lens, When it is within the range, the size and focal length of the detection range need to be readjusted, which makes the detection steps cumbersome, changeable, and difficult to improve efficiency.

In view of this, the conventional flexible circuit board does still need to be improved.

In order to solve the above problems, the purpose of this creation is to provide a flexible circuit board with a hole position check mark, which can quickly and accurately detect whether the actual position of the punching hole is within the allowable error range within the specified detection range of the CCD lens. .

The second purpose of this creation is to provide a flexible circuit board with hole inspection marks, which can improve the convenience of setting the marks for hole inspection without affecting the circuit design for transmitting control signals.

Another purpose of this creation is to provide a flexible circuit board with hole inspection marks. The marks used for hole inspection are not affected by the scrap area where the substrate is cut out, which can improve the convenience of cutting waste areas and effectiveness.

The directional or similar terms mentioned in the full text of this creation, such as "front", "rear", "left", "right", "up (top)", "down (bottom)", "inside", "outside" , "Side", etc., are mainly referred to the direction of the attached drawings, and each directionality or its approximate terms are only used to help explain and understand the embodiments of the creation, not to limit the creation.

The use of the quantifier "a" or "an" in the elements and components recorded in the entire text of this work is only for convenience and to provide the general meaning of the scope of the work; in this work, it should be interpreted as including one or at least one, and a single The concept of plural also includes the plural case, unless it obviously means otherwise.

The approximate terms such as "combination", "combination", or "assembly" described in the full text of this creation mainly include types that can still be separated without breaking the components after being connected, or that the components cannot be separated after being connected. They have common knowledge in the field. You can choose one according to the material or assembly needs of the components to be connected.

The flexible circuit board with hole inspection marks created in this work includes: a substrate with a plurality of blank areas; a circuit layer; a plurality of symbols, which are formed on the substrate together with the circuit layer, the circuit layer and the several The marks are not located in the blank areas; a plurality of punch holes corresponding to each of the blank areas penetrate the substrate; and a plurality of detection areas, each of which has at least one of the foregoing marks and one of the foregoing punching holes.

According to this, the flexible circuit board with a hole inspection mark created in this work can be used because the periphery of each punching hole has at least one mark formed with the circuit layer in the designated CCD lens detection range (that is, the detection area). By calculating the relative position of the mark and the punching hole, it can quickly and accurately detect whether the actual position of the punching hole conforms to the allowable error range, and has the effects of improving the accuracy of detecting the punching position and operating efficiency.

Wherein, the substrate may have a waste area located on the periphery of a wiring area, the blank areas may overlap the wiring area, the wiring layer is located in the wiring area, and the wiring layer has an input portion and an output portion. Each punching hole may be located between the input portion and the output portion. In this way, when installed in an electronic product, it has the effect of improving the convenience of connection.

Each of the detection areas may include a wiring area of the substrate, a waste area of the substrate, a aforementioned blank area, and an input portion of the circuit layer. In this way, the punching holes can be formed on both sides of the wiring area to reduce the degree of structural damage of the wiring area, and have the effects of improving the convenience of setting the punching holes and the like.

The number of the punching holes may be two, and the two punching holes are respectively located at two sides in an X direction adjacent to the wiring area. The centroids of the two punching holes pass through a centroid line, and the centroid line It may be parallel to the X direction. In this way, when the flexible circuit board is installed in a predetermined position in an electronic product, the alignment accuracy can be improved by the two punching holes, and the effect of avoiding deflection or sliding can be avoided.

The aforementioned symbols in each of the detection areas may be located in a wiring area of the substrate. In this way, there is no need to pay special attention to keeping the mark when cutting out the waste area, and it has the effects of improving the convenience and efficiency of cutting out the waste area.

The foregoing marks in each of the detection areas may be located between the input portion and the output portion. In this way, it has the effect of improving the convenience of setting the mark.

The substrate may have a support bar setting area overlapping the wiring area, the circuit layer may have a plurality of support bars, and the plurality of support bars and the mark may be located in the support bar setting area. In this way, the number or length of the support bars in the support bar setting area can be changed in accordance with the setting requirements of the mark, so as to leave a space where the mark can be set without affecting other circuit designs for transmitting control signals. It can improve the convenience of setting the mark without affecting the design of the circuit used to transmit the control signal.

Each of the punching holes may be located at a center position of each of the detection areas. In this way, it has the effect of facilitating alignment correction.

The length of each side of the mark may be 0.05 to 0.3 mm. In this way, it is ensured that the mark is easy to identify and has the effect of increasing the degree of freedom in designing the mark.

Wherein, the mark is circular and the diameter can be 0.05 ~ 0.3mm. In this way, the pattern of the mark is simple and easy to be accurately formed, and the round mark has only one reference point-the center of the circle, so it is less likely to be confused, can be quickly grasped and positioned, and has improved alignment accuracy and efficiency. efficacy.

The mark may be a copper layer formed on the substrate or a portion etched away from the copper layer to expose the substrate. In this way, an appropriate way can be selected to set the mark according to the line design, which has the effect of increasing the variety of the mark.

In order to make the above and other purposes, features, and advantages of this creation more obvious and easy to understand, the following describes the preferred embodiment of this creation in conjunction with the accompanying drawings, as follows:

Please refer to FIG. 1, which is a preferred embodiment of the flexible circuit board with hole check marks, which includes a substrate 1, a circuit layer 2, a plurality of marks 3, a plurality of punching holes 4 and A plurality of detection areas 5 are formed on the substrate 1 together with the circuit layer 2, and each of the detection areas 5 includes the mark 3 and the punching hole 4.

The substrate 1 can be made of, for example, polyimide (PI) material, and has the characteristics of light weight, thin thickness, softness, and flexibility. The substrate 1 can define an X direction and a Y direction that are orthogonal to each other. The substrate 1 has a scrap area 11 located on an outer periphery of a wiring area 12. The wiring area 12 can be used to set the circuit layer 2. In this embodiment, The substrate 1 is substantially rectangular, the wiring area 12 is located approximately in the center of the substrate 1, and the scrap area 11 may be located at the outermost edge of the substrate 1 and looped around the wiring area 12. In addition, the substrate 1 further has a plurality of blank areas 13 for setting the plurality of punching holes 4, and the plurality of blank areas 13 preferably overlap the wiring areas 12. The substrate 1 may further include a plurality of support bar setting areas 14, and the plurality of support bar setting areas 14 also preferably overlap the wiring area 12.

The circuit layer 2 is located in the wiring area 12 of the substrate 1, and the circuit layer 2 is not located in the blank areas 13. The circuit layer 2 referred to in this embodiment is a circuit laid on the wiring area 12. Pattern, so the part without the circuit pattern is still the substrate 1. The circuit layer 2 has an input portion 21 and an output portion 22 arranged along the Y direction of the substrate 1. In use, the input section 21 is used to integrate with the control panel of electronic products, and the output section 22 is combined with the machine to transmit signals; for example, after the manufacturer of the liquid crystal display obtains the flexible circuit board, The input portion 21 of the flexible circuit board is electrically connected to the control panel of the liquid crystal display, and the output portion 22 of the flexible circuit board is electrically connected to the liquid crystal display. The input portion 21 and the The lines between the output sections 22 transmit control messages to the liquid crystal display. In addition, the circuit layer 2 may further include a plurality of support bars 23 located in each of the support bar setting areas 14. Most of the plurality of support bars 23 are located between the input portion 21 and the output portion 22.

The symbols 3 are formed on the substrate 1 together with the circuit layer 2, but do not overlap with the circuit layer 2 and are not located in the blank spaces 13. That is, a mark 3a (see FIG. 2) that does not overlap the circuit layer 2 may be formed on the substrate 1, and the mark 3a may be a copper layer formed on the substrate 1; or, It is also possible to add a copper layer on the substrate 1, and then partially etch away the copper layer to expose the substrate 1 to form a mark 3b (see FIG. 3). The marks 3 are used to provide a reference point for identification of the relative position with the adjacent punching hole 4 (to be described in detail later).

The plurality of punching holes 4 respectively correspond to the blank areas 13 and pass through the substrate 1. In this embodiment, the plurality of punching holes 4 are preferably located between the input portion 21 and the output portion 22, so that Several punching holes 4 assist in the alignment, ensuring that the flexible circuit board can be accurately installed in a predetermined position in an electronic product. In detail, each of the blank areas 13 will only be provided with one of the aforementioned punching holes 4 to ensure that the punching of the punching holes 4 will not damage the circuit layer 2 or even the slightest error through the blank area 13. Mark for any purpose. In addition, the size and shape of the punching hole 4 are not limited in this creation, and are based on the principle of being able to fulfill customer or design requirements. The punching hole 4 is preferably circular, so that the center of the circle is used as a reference for calculating the relative position with the adjacent mark 3.

It should be noted that the number of punching holes 4 in this embodiment may be selected as two, and the two punching holes 4 may be respectively located on two sides of the wiring area 12 adjacent to the substrate 1 in the X direction. The centroid C of 4 passes through a centroid line L, which is preferably parallel to the aforementioned X direction, that is, orthogonal to the aforementioned Y direction; in this way, the convenience of punching the two punching holes 4 can be improved And reduce the degree of damage to the structure of the wiring area 12 of the substrate 1 provided by the two punching holes 4, and when the flexible circuit board is installed at a predetermined position in the electronic product, it can also be lifted by the two punching holes 4 Alignment accuracy to avoid deflection or slippage.

The range of each detection area 5 is consistent with the specifications of the CCD lens used by the AOI. Therefore, the detection area 5 is usually a rectangular area such as 3mm x 3mm, 5mm x 5mm, or 3mm x 6mm, but it is not limited to these examples. Each of the detection areas 5 has at least one of the foregoing marks 3 and one of the foregoing punching holes 4, and each of the detection areas 5 is preferably disposed centered on the centroid C of the punching holes 4 inside thereof. The detection areas 5 in this embodiment may be two in accordance with the number of the punching holes 4, and the two detection areas 5 may be respectively located on two sides of the wiring area 12 adjacent to the substrate 1 in the X direction; in other words, each of the two The detection area 5 may cover the wiring area 12 of the substrate 1, the scrap area 11 of the substrate 1, a part or all of the aforementioned blank area 13, and the input portion 21 of the circuit layer 2.

Please refer to FIGS. 1, 2, and 4. The foregoing symbol 3 in each of the detection areas 5 in this embodiment is preferably located in the wiring area 12 of the substrate 1, and is preferably located in the input portion 21 of the circuit layer 2 and Between the output sections 22. The shape of the symbol 3 is not limited, and may be, for example, a convex polygon (as shown in FIG. 6), and each side length is about 0.05 to 0.3 mm; or the symbol 3 is preferably circular (such as Figure 5) and the diameter is about 0.05 ~ 0.3mm. Because the circle has a simple pattern, compared with other forms, the circle has only one reference point P─the center of the circle, which is easier to grasp and locate quickly.

In detail, please refer to FIGS. 1 and 2. In the enlarged range of the area A in FIG. 1, the mark 3 may be located in the support bar setting area 14 of the substrate 1, and the support bar setting area 14 is adjacent to the area. In the waste area 11, since the plurality of support bars 23 are used to strengthen the flexible circuit board, rather than to transmit control signals, the support bars 23 in the support bar setting area 14 can be changed to meet the needs of the setting of the mark 3. Quantity or length to leave a space where the mark 3 can be set without affecting other circuit designs for transmitting control signals; therefore, the mark 3 is preferably provided in the support bar setting area 14. In addition, the reference point P provided by the mark 3 may be selected to be linearly opposite to the preset position of the centroid C of the punching hole 4 in the Y direction; that is, the preset of the centroid C of the mark 3 and the punching hole 4 may be selected. The position has only a change amount Δy in the Y direction and no change amount Δx in the X direction.

In the process of checking the position of the punching hole 4 of the flexible circuit board with AOI, the CCD lens can be directly aligned to the detection area 5 without having to adjust the focus and shooting range, and can quickly capture the image. During the image analysis, the actual position of the centroid C of the punching hole 4 can be quickly captured and used as the origin of comparison, and the reference point P provided by the mark 3 can also be captured, and the Y direction of the two can be calculated. The change amount Δy and the change amount Δx in the X direction are compared with a preset value. That is, in this example, the preset value of the change amount Δy should be a positive value, and the preset value of the change amount Δx should be zero; therefore, it should be determined whether the actual value of the change amount Δy is a positive value. If the judgment result is yes, then analyze whether the difference between the actual value of the change amount Δy and the preset value falls within the error range, and analyze whether the difference between the actual value of the change amount Δx and the preset value falls within the error range, If the results of the two analyses are both yes, the punching hole 4 meets the demand for good quality, and if any of the results of the two analysis results are not, the punching hole 4 does not meet the demand for good quality.

In the same way, please refer to Figures 1 and 4. In the enlarged range of area B in Figure 1, the reference point P provided by the mark 3 can be selected at the preset position of the centroid C of the punching hole 4 at The X direction is opposite to a straight line; that is, the preset position of the centroid C of the mark 3 and the punching hole 4 has only a change amount Δx in the X direction and no change amount Δy in the Y direction. In this way, during the image analysis, the actual position of the centroid C of the punching hole 4 can be quickly captured and used as the origin of comparison, and the reference point P provided by the mark 3 can also be captured, and the two can be calculated in the X direction. The change amount Δx and the change amount Δy in the Y direction are compared with a preset value. That is, in this example, the preset value of the change amount Δx should be a negative value, and the preset value of the change amount Δy should be zero; therefore, whether the actual value of the change amount Δx is a negative value should be judged first. If the judgment result is yes, then analyze whether the difference between the actual value of the change amount Δx and the preset value falls within the error range, and analyze whether the difference between the actual value of the change amount Δy and the preset value falls within the error range, If the results of the two analyses are both yes, the punching hole 4 meets the demand for good quality, and if any of the results of the two analysis results are not, the punching hole 4 does not meet the demand for good quality.

Please also refer to FIG. 5. In other embodiments, the reference point P provided by the mark 3 may be selected to be diagonally opposite to the preset position of the centroid C of the punching hole 4; that is, the mark 3 and the The preset position of the centroid C of the punching hole 4 has both a change amount Δx in the X direction and a change amount Δy in the Y direction. In this way, during the image analysis, the actual position of the centroid C of the punching hole 4 can be quickly captured and used as the origin of comparison, and the reference point P provided by the mark 3 can also be captured, and the two can be calculated in the X direction. The change amount Δx and the change amount Δy in the Y direction are compared with a preset value. That is, in this example, the preset value of the change amount Δx should be a negative value, and the preset value of the change amount Δy should be a positive value; therefore, it should be judged preferentially whether the actual value of the change amount Δx is a negative value. , And determine whether the actual value of the change amount Δy is positive. If any of the two determination results is not, the punching 4 does not meet the demand for good products. If the two determination results are yes, then analyze the change amount. Whether the difference between the actual value of △ x and the preset value falls within the error range, and whether the difference between the actual value of △ y and the preset value falls within the error range. If the results of the two analyses are both yes, then The punching hole 4 meets the demand for good quality. If any of the two analysis results is negative, the punching hole 4 does not meet the demand for good quality.

It is worth mentioning that the symbol 3 of any of the embodiments disclosed above can be circular (see Figure 2), square (see Figure 5), and long (see Figure 5) Figure 6a), convex shape (please refer to Figure 6b) or cross shape (please refer to Figure 6c) and other arbitrary shapes, this creation is not limited.

This creation does not limit the number of marks 3 in the same detection area 5. It is a person with ordinary knowledge in the field who can adjust according to the alignment needs or the complexity of the line, so the drawings disclosed in the embodiments are not used as limit. For example, when the number of marks 3 in the same detection area 5 is several, the effect of re-inspection can be achieved by comparing the actual positions of the marks 3 and the punching holes 4 respectively, which can help improve the accuracy of the detection results. Sex.

In summary, the flexible circuit board with hole inspection marks created in this creation has at least one mark formed with the circuit layer in the designated CCD lens detection range (that is, the detection area) around each punching hole. The mark for hole position inspection can be set without affecting the design of the circuit used to transmit the control signal, so the relative position of the mark and the punching hole can be calculated to quickly and accurately detect the punching hole. Whether the actual position meets the allowable error range has the effects of improving the accuracy, convenience and efficiency of the detection of the punching position: the mark used for hole position inspection is not affected by the scrap area where the substrate is cut out. It can improve the convenience and efficiency of cutting waste area.

Although this creation has been disclosed using the above-mentioned preferred embodiments, it is not intended to limit this creation. Anyone skilled in this art can make various changes and modifications to the above-mentioned embodiments without departing from the spirit and scope of this creation. The technical scope protected by the creation, so the scope of protection of this creation shall be determined by the scope of the attached patent application.

1‧‧‧ substrate
11‧‧‧ Waste area
12‧‧‧ wiring area
13‧‧‧Blank area
14‧‧‧ Support bar setting area
2‧‧‧ Line layer
21‧‧‧Input Department
22‧‧‧Output Department
23‧‧‧ support bar
3, 3a, 3b‧‧‧
4‧‧‧ punching
5‧‧‧testing area
C‧‧‧ shape heart
L‧‧‧shaped heart line
P‧‧‧Reference point

[Figure 1] A plan view of a preferred embodiment of the present invention.
[Figure 2] Partial enlarged view of area A in Figure 1.
[Figure 3] Another aspect of the mark of this creation, revealing the mark formed by etching a local copper layer.
[Figure 4] Partially enlarged view of area B in Figure 1.
[Fig. 5] A partially enlarged view of another embodiment of this creation.
[Figure 6a] Another form of the mark of this creation.
[Figure 6b] Another form of the mark of this creation.
[Figure 6c] Another form of the mark of this creation.

Claims (11)

A flexible circuit board with a hole check mark includes:
A substrate with several blank areas;
A line layer
Several marks are formed on the substrate together with the circuit layer, and neither the circuit layer nor the several marks are located in the blank spaces;
A plurality of punching holes respectively penetrate the substrate corresponding to the blank area; and a plurality of detection areas, each of which has at least one of the aforementioned marks and one of the aforementioned punching holes. The flexible circuit board with a hole inspection mark according to item 1 of the scope of the patent application, wherein the substrate has a waste area located on the outer periphery of a wiring area, the blank areas overlap the wiring area, and the circuit layer is located In the wiring area, the circuit layer has an input portion and an output portion, and the punching holes are located between the input portion and the output portion. The flexible circuit board with a hole position check mark as described in item 2 of the scope of the patent application, wherein each of the detection areas covers a wiring area of the substrate, a waste area of the substrate, a aforementioned blank area, and an input of the circuit layer unit. According to the flexible circuit board with a hole position check mark described in item 2 of the scope of patent application, the number of the punch holes is two, and the two punch holes are respectively located on two sides in an X direction adjacent to the wiring area. The centroids of the two punched holes are passed by a centroid line that is parallel to the X direction. According to the flexible circuit board with a hole position inspection mark according to item 2 of the scope of the patent application, wherein each of the foregoing marks in the detection area is located in a wiring area of the substrate. The flexible circuit board with a hole position check mark as described in item 5 of the scope of the patent application, wherein each of the foregoing marks in the detection area is located between the input section and the output section. The flexible circuit board with a hole inspection mark according to item 6 of the scope of the patent application, wherein the substrate has a support bar setting area overlapping the wiring area, the circuit layer has a plurality of support bars, and the plurality of support bars And the mark is located in the support bar setting area. The flexible circuit board with a hole position check mark according to any one of the claims 1 to 7, wherein each of the punching holes is located at the center of each of the detection areas. The flexible circuit board with a hole position inspection mark according to any one of the items 1 to 7 of the scope of patent application, wherein the length of each side of the mark is 0.05 to 0.3 mm. The flexible circuit board with a hole position inspection mark according to any one of the claims 1 to 7, wherein the mark is circular and has a diameter of 0.05 to 0.3 mm. The flexible circuit board with a hole inspection mark according to any one of claims 1 to 7, wherein the mark is a copper layer formed on the substrate or is etched away in a copper layer. A part of the substrate is exposed.