CN215420887U - Circuit board alignment structure - Google Patents

Abstract

The utility model discloses a circuit board alignment structure which comprises a circuit board and a windowing copper-exposing area arranged on the circuit board, wherein the windowing copper-exposing area is used for aligning the circuit board. Through set up windowing dew copper district on the circuit board, the dew copper district of windowing is regarded as the counterpoint mark of circuit board compares in traditional silk screen printing mark, has reduced the silk screen printing tolerance that the silk screen printing in-process produced, has improved the counterpoint degree of accuracy of circuit board. Meanwhile, the alignment process reduces a silk-screen printing process, and saves the silk-screen printing cost of alignment marks.

Description

Circuit board alignment structure

Technical Field

The utility model relates to the technical field of circuit board alignment, in particular to a circuit board alignment structure.

Background

In the electronic field, especially the precision device manufacturing field, the requirement on the manufacturing precision of the device is higher. The traditional silk-screen alignment mode is characterized in that a silk-screen alignment line is additionally arranged on a circuit board, alignment errors generated by the alignment mode come from the appearance tolerance of the circuit board and also come from silk-screen tolerance generated in the silk-screen process, so that the traditional silk-screen alignment mode has large tolerance, alignment deviation can be caused, the alignment requirements can not be met, and the problems of poor contact between the circuit board and other parts and the like are caused.

Accordingly, the prior art is yet to be improved and developed.

SUMMERY OF THE UTILITY MODEL

In view of the above-mentioned shortcomings of the prior art, the present invention provides a circuit board alignment structure, which is intended to reduce the alignment error of the circuit board.

The technical scheme of the utility model is as follows:

a circuit board alignment structure, comprising: the circuit board and set up windowing on the circuit board exposes copper district, wherein, windowing exposes copper district is used for the counterpoint of circuit board.

The circuit board counterpoint structure, wherein, be equipped with the counterpoint district on the circuit board, the copper district is appeared in windowing is located the counterpoint district.

The circuit board contraposition structure, wherein, the windowing copper-exposed area is one or more of a strip-shaped windowing, a circular windowing or a cross-shaped windowing.

The circuit board contraposition structure, wherein, the windowing copper-exposed area is a window or a plurality of windows.

The circuit board counterpoint structure, wherein, the length in windowing dew copper district is greater than 0.1mm, the width in windowing dew copper district is 0.1-0.3 mm.

The circuit board counterpoint structure, wherein, the width in windowing dew copper district is 0.2 mm.

The circuit board is a flexible circuit board or a printed circuit board.

The circuit board counterpoint structure, wherein, the circuit board is flexible circuit board, flexible circuit board includes: the flexible substrate and the connecting part are positioned on the flexible substrate; the windowing copper exposure area is arranged on the connecting portion, the connecting portion is used for being connected with a connector, and the windowing copper exposure area is used for aligning the flexible circuit board with the connector.

The circuit board contraposition structure, wherein, still have spacing bellying on the connecting portion, spacing bellying is used for restricting the connecting portion inserts the degree of depth of connector.

The circuit board alignment structure is characterized in that the distance from the limiting protruding part to the first edge of the connecting part is consistent with the depth of the connecting part inserted into the connector.

Has the advantages that: the utility model provides a circuit board alignment structure which comprises a circuit board and a windowing copper-exposing area arranged on the circuit board, wherein the windowing copper-exposing area is used for aligning the circuit board. Through set up windowing dew copper district on the circuit board, the dew copper district of windowing is regarded as the counterpoint mark of circuit board compares in traditional silk screen printing mark, has reduced the silk screen printing tolerance that the silk screen printing in-process produced, has improved the counterpoint degree of accuracy of circuit board. Meanwhile, the alignment process reduces a silk-screen printing process, and saves the silk-screen printing cost of alignment marks.

Drawings

Fig. 1 is a schematic diagram of a circuit board alignment structure according to the present invention.

Reference numerals: 1. the circuit board, 11, flexible substrate, 12 connecting portion, 2, windowing dew copper district, 3, counterpoint district, 4, spacing bellying.

Detailed Description

The present invention provides a circuit board alignment structure, and the present invention is further described in detail below to make the purpose, technical solution, and effect of the present invention clearer and clearer. It should be understood that the specific embodiments described herein are merely illustrative of the utility model and are not intended to limit the utility model.

It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or be indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or be indirectly connected to the other element.

It should also be noted that the same or similar reference numerals in the drawings of the embodiments of the present invention correspond to the same or similar components; in the description of the present invention, it should be understood that if there is an orientation or positional relationship indicated by the terms "upper", "lower", "left", "right", etc. based on the orientation or positional relationship shown in the drawings, it is only for convenience of describing the present invention and simplifying the description, but it is not intended to indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and therefore, the terms describing the positional relationship in the drawings are only used for illustrative purposes and are not to be construed as limiting the present patent, and the specific meaning of the terms may be understood by those skilled in the art according to specific circumstances.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature.

The existing alignment splicing mode is that a silk-screen white line is added on a circuit board, the silk-screen white line needs to be placed at a position corresponding to the circuit board by a silk-screen plate with meshes, the white line is printed on the circuit board by adopting printing ink through the meshes, the position of the silk-screen white line on the circuit board is inaccurate and the size error of the silk-screen white line can be generated in the process of the silk-screen white line, the alignment precision of the circuit board is low, and the problem of poor connection between the circuit board and other devices or other circuit boards can exist due to low positioning precision.

Therefore, in order to improve the alignment accuracy of the circuit board, the present invention provides a circuit board alignment structure, referring to fig. 1, the circuit board alignment structure includes: the circuit board 1 and set up and be in windowing on the circuit board 1 dew copper district 2, wherein, it is used for to window dew copper district 2 the counterpoint of circuit board 1.

Specifically, the utility model directly arranges a windowing copper-exposed area 2 at the position of a circuit board 1 needing contraposition, the windowing copper-exposed area 2 is used as a contraposition mark for contraposition of the circuit board 1, the structure of the circuit board 1 is usually a substrate, a copper foil covered on the substrate and an insulating material covered on the copper foil, the arrangement of the windowing copper-exposed area 2 is to remove the insulating material on the copper foil so as to form the contraposition mark, when the circuit board 1 needs to be connected with other devices or other circuit boards, the windowing copper-exposed area 2 is used as the contraposition mark to contraposition the circuit board 1 with other devices or other circuit boards, compared with the traditional silk-screen mark, the silk-screen tolerance generated in the silk-screen process is reduced, and the contraposition accuracy of the circuit board 1 is improved. Meanwhile, the alignment process reduces a silk-screen printing process, and saves the silk-screen printing cost of alignment marks.

The circuit board alignment structure provided by the utility model can be suitable for various alignment scenes, including but not limited to alignment of a Flexible Printed Circuit (FPC) and a connector, binding alignment between a first circuit board and a second circuit board, and the like, wherein the first circuit board can be a flexible circuit board or a Printed Circuit Board (PCB), the second circuit board can be a flexible circuit board or a printed circuit board, in other words, the circuit board alignment structure can be used for binding alignment between the flexible circuit board and the flexible circuit board, binding alignment between the flexible circuit board and the printed circuit board, and binding alignment between the printed circuit board and the printed circuit board. For example, when the flexible circuit board is aligned with the connector, a windowing copper-exposed area 2 is formed at a position, close to the insertion area, on the flexible circuit board, the position of the windowing copper-exposed area 2 is determined according to the depth of a clamping groove of the connector, and when the flexible circuit board is inserted into the connector, the windowing copper-exposed area 2 is flush with the tail end of the clamping groove of the connector, which indicates that the flexible circuit board is inserted in place; when the first circuit board is bound with the second circuit board, a windowing copper-exposing area 2 can be arranged near the binding area of the first circuit board or the binding area of the second circuit board, or the windowing copper-exposing area 2 can be arranged near the binding area of the first circuit board and the binding area of the second circuit board, and the binding area of the first circuit board and the binding area of the second circuit board are in alignment binding according to the windowing copper-exposing area 2, so that the first circuit board is well connected with the second circuit board. Of course, the circuit board alignment structure of the present invention may also be used for binding the flexible circuit board and the display panel, or aligning a target of the printed circuit board, for example, setting the windowing copper-exposed area 2 on the printed circuit board as an alignment target in the process of attaching the electronic component to the printed circuit board.

The windowing copper-exposed area 2 is exposed out of the copper foil in the circuit board 1, and the copper foil is good in light reflection effect, the color of the copper foil is different from the color of the insulating material covered on the upper surface of the circuit board 1, so that the windowing copper-exposed area 2 serving as an alignment mark is more obvious in alignment, and the alignment of the circuit board 1 is more accurate. Meanwhile, the windowing copper-exposed area can also be used as a test site of the circuit board 1, and the conducting condition and the like of the circuit board 1 can be tested through the test site. The windowed bare copper area can also be used for grounding and preventing static discharge.

The circuit board 1 with the circuit board alignment structure can be applied to a display panel and can also be applied to other electronic products. The Display panel may be a Display panel such as an Organic Light Emitting Diode (OLED) Display panel or a Liquid Crystal Display (LCD) panel, or may be a Display panel using a Light Emitting Diode (LED) device, for example, a Micro-LED Display panel.

In one embodiment, the circuit board 1 is provided with a registration area 3, and the windowed and exposed copper area 2 is located in the registration area 3.

Specifically, in order to align the circuit board 1 with other components or other circuit boards, a positioning area 3 is disposed on the circuit board 1, and the positioning area 3 is used for setting a positioning mark, that is, the windowed and exposed copper area 2 is located in the positioning area 3. In the counterpoint scene of difference, the position of counterpoint district 3 on the circuit board 1 is inequality, for example, when flexible circuit board and connector are connected, flexible circuit board's counterpoint district 3 is established at the position that is close to its grafting position, when tying up between two circuit boards, circuit board 1's counterpoint district 3 is established at the position that is close to its tying up the position.

In one embodiment, the windowed and copper-exposed area 2 is one or more of a strip-shaped windowed window, a round windowed window or a cross-shaped windowed window.

Specifically, can select to set up different windowing shapes according to specific counterpoint scene, different counterpoint scenes can adopt the windowing dew copper district 2 of one or more different shapes as counterpoint mark, because the counterpoint object of different counterpoint scenes can have the difference, the counterpoint mode that it adopted also differs a bit, its suitable windowing shape can have the difference, for example, when flexible circuit board and connector counterpoint, can adopt rectangular shape windowing, the length direction of rectangular shape windowing is unanimous with the length direction of the draw-in groove of connector.

In one embodiment, the windowed copper-exposed area 2 is a window or a plurality of windows.

Specifically, one or more alignment marks may be disposed on the circuit board 1, that is, one or more windowed and exposed copper regions 2 may be disposed on the circuit board 1, and the number of the regions may be set according to different alignment scenarios. When a plurality of window copper-exposed regions 2 are provided, the shapes of the window copper-exposed regions 2 may be the same or different. For example, when the flexible circuit board is connected with the connector, the left and right positions of the flexible circuit board are respectively provided with a windowing copper-exposed area 2, the left and right windowing copper-exposed areas 2 are positioned on the same straight line, the straight line is consistent with the length direction of the clamping groove of the connector, and therefore when the flexible circuit board is aligned, the left and right ends of the clamping groove are required to be simultaneously aligned with the windowing copper-exposed areas 2 at the left and right positions respectively, so that the flexible circuit board is ensured to be inserted not to be inclined and to be inserted to a sufficient depth, and the flexible circuit board is effectively connected with the connector.

In one embodiment, the length of the windowed copper areas 2 is greater than 0.1mm, and the width of the windowed copper areas 2 is 0.1-0.3 mm.

Specifically, the width of the windowed copper-exposed area 2 refers to the size of the windowed copper-exposed area 2 in the alignment direction during alignment, the width of the windowed copper-exposed area 2 refers to the size of the windowed copper-exposed area 2 in the direction perpendicular to the alignment direction, and the alignment direction refers to the direction in which two objects to be aligned move relative to each other, for example: when the flexible circuit board is aligned with the connector, the alignment direction indicates the plugging direction of the flexible circuit board. The length of the windowing copper-exposed area 2 cannot be too small, and the too small length of the windowing copper-exposed area 2 can cause the position of the alignment mark to be unclear by human eyes, so that the assembly efficiency of two alignment parts and the alignment accuracy are affected. The width of windowing dew copper district 2 can not too big also can not the undersize, the too big then increased the area of windowing of width of windowing dew copper district 2, increased the area that the copper foil exposes, also increased the cost of windowing, simultaneously the too big accuracy that can lead to people's eye alignment in windowing dew copper district 2 reduces, has reduced the accuracy nature of counterpointing on the contrary, and the too little position that can lead to people's eye to see clearly the counterpoint sign of width of windowing dew copper district 2 influences the packaging efficiency of two counterpoint parts and the accuracy nature of counterpoint. Preferably, the width of the windowed copper-exposed area 2 is 0.2 mm.

In one embodiment, the circuit board 1 is a flexible circuit board or a printed circuit board.

In particular, a Printed Circuit Board (PCB) is one of important parts of the electronic industry. Almost every electronic device, as small as electronic watches, calculators, as large as computers, communication electronics, military weaponry systems, requires electronic components such as integrated circuits, and printed circuit boards are used to electrically interconnect the various components. The printed circuit board is composed of an insulating base plate, connecting leads and a bonding pad for assembling and welding electronic elements, and has double functions of a conductive circuit and the insulating base plate. The printed circuit board can replace complex wiring to realize electrical connection among elements in the circuit, thereby simplifying the assembly and welding work of electronic products, reducing the wiring workload in the traditional mode and greatly lightening the labor intensity of workers; and the volume of the whole machine is reduced, the product cost is reduced, and the quality and the reliability of the electronic equipment are improved. The printed wiring board has good product consistency. The printed circuit board can adopt a standardized design, and is beneficial to realizing mechanization and automation in the production process. Meanwhile, the whole printed circuit board subjected to assembly and debugging can be used as an independent spare part, so that the exchange and maintenance of the whole machine product are facilitated. At present, printed circuit boards are widely used in the production and manufacture of electronic products. The printed circuit board of the present invention refers to a rigid printed circuit board.

A Flexible Printed Circuit (FPC) is a highly reliable and flexible printed circuit board made of a polyimide or polyester film as a base material, and a large number of precision components are stacked and embedded in a narrow and limited space by embedding a circuit design on a flexible light and thin plastic sheet, thereby forming a flexible circuit. The circuit can be bent at will, is folded, has light weight, small volume, good heat dissipation and convenient installation, and breaks through the traditional interconnection technology. In the structure of the flexible circuit board, the constituent materials are an insulating film forming a base layer of a circuit, a conductor, and an adhesive bonding a copper foil to the insulating layer. In the design of a multilayer flexible circuit board, the insulating layer is bonded with the inner layer. The insulating layer is also used as a protective cover to insulate the circuit from dust and moisture and to reduce stress during flexing, and the copper foil forms a conductive layer. There are many types of insulating film materials, but polyimide and polyester materials are most commonly used. Polyimide (PI) has non-flammability, stable geometry, high tear strength, and the ability to withstand soldering temperatures; polyester, also known as polyethylene terephthalate (PET), has physical properties similar to polyimide, has a low dielectric constant, absorbs little moisture, but does not resist high temperature. Polyesters have a melting point of 250 ℃ and a glass transition temperature (Tg) of 80 ℃, which limits their use in applications requiring a large number of end welds. In low temperature applications, the polyester exhibits rigidity. Nevertheless, polyester is suitable for use in products such as telephones and other products that do not require exposure to harsh environments. Polyimide dielectric films are typically bonded with polyimide or acrylic adhesives, and polyester dielectric materials are typically bonded with polyester adhesives. The advantage of combining with materials having the same characteristics, after dry welding, or after a number of lamination cycles, allows dimensional stability. Other important properties in adhesives are a lower dielectric constant, a higher insulation resistance, a high glass transition temperature and a low moisture absorption. Copper foil is suitable for use in flexible circuits and may be prepared by Electrodeposition (ED), or electroplating. The copper foil is flexible and can be made in a variety of thicknesses and widths, and the matte side of the electrodeposited copper foil is often specially treated to improve its adhesion. Besides flexibility, the copper foil also has the characteristic of hardness and smoothness, and is suitable for being applied to occasions requiring dynamic deflection. The flexible circuit board is usually manufactured by a punching process and has the characteristics of high wiring density, light weight, thin thickness, high dimensional accuracy and the like.

Flexible circuit boards are commonly used for connecting parts of products such as portable phones, notebook computers, digital cameras, liquid crystal display screens or automobile dashboards, direction lamps and the like. The flexible circuit board has higher flexibility, can be folded, wound or bent according to multiple angles, and can be assembled in a three-dimensional manner, so that the volume of an electronic product is reduced, electrical equipment is miniaturized and thinned, and the flexible circuit board is widely applied to the field of various products such as a portable terminal and the like. At present, the main board PCB of the mobile terminal and the display screen and other accessory components are generally communicated with each other through a flexible circuit board, and the communication process needs to be aligned, so that two alignment parts can be connected in place and accurately.

In one embodiment, the circuit board 1 is a flexible circuit board comprising: a flexible substrate 11 and a connection portion 12 on the flexible substrate 11; windowing dew copper district 2 sets up connecting portion 12, connecting portion 12 are used for being connected with the connector, windowing dew copper district 2 is used for the flexible circuit board with the counterpoint of connector.

Specifically, the connector refers to an FPC connector for connecting the printed circuit board and the flexible circuit board to mechanically and electrically connect the printed circuit board and the flexible circuit board. The FPC connector is characterized in that one end of the FPC connector is connected with a printed circuit board in a welding mode (usually adopting an SMT welding mode), the other end of the FPC connector is oppositely inserted with a flexible circuit board, and a locking device is designed on the FPC connector to enable the flexible circuit board and the FPC connector to be locked, so that certain contact reliability is kept. At present, various consumer electronic products integrate miniaturization, thinning and high performance, and the flexible circuit board is usually plugged with a matched FPC connector to reduce the internal space of the electronic products, reduce the weight and reduce the assembly cost. The FPC and the FPC connector are widely applied to the computer industry, household appliances and automatic control equipment, and are particularly applied to small-size and light-weight consumer electronic products. In the utility model, the circuit board 1 is a flexible circuit board capable of being plugged with a connector, the flexible circuit board is provided with a connecting part 12 for plugging the connector, the distance between the windowing copper-exposed area 2 and the first edge of the connecting part 12 is just the depth of the flexible circuit board inserted into the slot of the connector, so that when the flexible circuit board is plugged with the connector, after the connecting part 12 is inserted into the slot of the connector, the windowing copper-exposed area 2 is aligned with the first edge of the slot of the connector, the flexible circuit board can be inserted into a specified depth, and finally the flexible circuit board is fixed on the connector through a locking device on the connector, thereby realizing accurate and stable connection of the flexible circuit board and the connector.

In one embodiment, the connecting portion 12 further has a limiting protrusion 4 thereon, and the limiting protrusion 4 is used for limiting the depth of the connecting portion 12 inserted into the connector.

In particular, in order to prevent the flexible circuit board from being damaged by being inserted too deeply when the connector is plugged, a limiting projection part 4 is further arranged on the connecting part 12, and the limiting projection part 4 is connected with the flexible circuit board. When the flexible circuit board is spliced with the connector, the limiting protruding part 4 can be propped against the first edge of the clamping groove of the connector, so that the connecting part 12 is prevented from being inserted too deeply, when the limiting protruding part 4 is abutted against the first edge of the clamping groove, the window is opened, the copper is exposed, and the area 2 is aligned with the flexible circuit board and the connector more accurately. The limiting convex parts 4 can be arranged one by one or a plurality of, when a plurality of limiting convex parts 4 are arranged, the distance from each limiting convex part 4 to the first edge of the clamping groove of the connector is the same, so that the connecting part 12 can be prevented from being inserted and inclined. The limiting convex part 4 can be arranged in the middle of the connecting part 12, and can also be arranged on the left side and the right side of the connecting part 12. Spacing bellying 4 can with the integrative setting of flexible circuit board's substrate, also can adopt other materials to make spacing bellying 4, will again spacing bellying 4 with flexible circuit board's substrate is connected, can adopt the adhesive will spacing bellying 4 with flexible circuit board's substrate is connected, also can adopt the mounting will spacing bellying 4 is fixed on the flexible circuit board, as long as do not destroy flexible circuit board can. The shape of the limiting convex part 4 is not limited, and the limiting convex part can be a columnar convex part, a block convex part or a hemispherical convex part, as long as the limiting effect on the insertion depth can be achieved. When the flexible circuit board needs to be pulled out of the connector, the limiting convex part 4 can be clamped by clamping tools such as tweezers, and the like, and the flexible circuit board is pulled out, so that the base material of the flexible circuit board cannot be damaged.

In one embodiment, the distance from the position-limiting protrusion 4 to the first edge of the connecting portion 12 is the same as the depth of the connecting portion 12 inserted into the connector.

Specifically. The first edge of the connecting portion 12 refers to a side parallel to the card slot edge of the connector. The distance between the limiting convex part 4 and the first edge of the connecting part 12 is just the depth of the flexible circuit board inserted into the clamping groove of the connector, so that the limiting convex part 4 can also be used for aligning the flexible circuit board with the connector.

Illustratively, the alignment scene of the alignment structure of the circuit board 1 of the utility model is the alignment of a flexible circuit board and a connector, the alignment structure comprises a flexible circuit board and a windowing copper-exposing area 2 arranged on the flexible circuit board, the flexible circuit board comprises a flexible substrate 11 and a connecting part 12 arranged on the flexible substrate 11, the connecting part 12 is used for connecting the flexible circuit board and the connector, a strip windowing copper-exposing area 2 is arranged on the connecting part 12, the strip windowing copper-exposing area 2 is parallel to a first edge of the connecting part 12, the distance from the strip windowing copper-exposing area 2 to the first edge is consistent with the depth of the connecting part 12 inserted into the connector, the length of the strip windowing copper-exposing area 2 is slightly shorter than the width of the connecting part 12, the width of the length of the strip windowing copper-exposing area 2 is 0.2mm, two limit bulges 4 are respectively arranged on the left side edge and the right side edge of the connecting part 12, the limiting protruding part 4 and the base material of the flexible circuit board are integrally arranged, and the distance from the limiting protruding part 4 to the first edge of the connecting part 12 is consistent with the depth of the connecting part 12 inserted into the connector. In the process of inserting the flexible circuit board into the clamping groove of the connector, the edge of the clamping groove of the connector is abutted through the limiting boss 4, and the windowing copper exposure area 2 serves as an alignment mark of the flexible circuit board and aligned with the connector, so that the silk screen tolerance generated in the silk screen printing process is reduced, and the alignment accuracy of the circuit board 1 is improved. Meanwhile, the alignment process reduces a silk-screen printing process, and saves the silk-screen printing cost of alignment marks.

In summary, the present invention provides a circuit board alignment structure, which includes a circuit board and a window copper-exposing area disposed on the circuit board, wherein the window copper-exposing area is used for alignment of the circuit board. Through set up windowing dew copper district on the circuit board, the dew copper district of windowing is regarded as the counterpoint mark of circuit board compares in traditional silk screen printing mark, has reduced the silk screen printing tolerance that the silk screen printing in-process produced, has improved the counterpoint degree of accuracy of circuit board. Meanwhile, the alignment process reduces a silk-screen printing process, and saves the silk-screen printing cost of alignment marks.

It is to be understood that the utility model is not limited to the examples described above, but that modifications and variations may be effected thereto by those of ordinary skill in the art in light of the foregoing description, and that all such modifications and variations are intended to be within the scope of the utility model as defined by the appended claims.

Claims (9)

1. A circuit board is to bit architecture, its characterized in that includes: the device comprises a circuit board and a windowing copper-exposing area arranged on the circuit board, wherein the windowing copper-exposing area is used for aligning the circuit board;

the windowing copper-exposed area exposes the copper foil in the circuit board;

the circuit board is provided with a counterpoint area, and the windowing copper exposure area is located in the counterpoint area.

2. The circuit board alignment structure of claim 1, wherein the windowed and exposed copper area is one or more of a strip-shaped windowed window, a circular windowed window or a cross-shaped windowed window.

3. The alignment structure of claim 1, wherein the copper-exposed window area is a window or a plurality of windows.

4. The alignment structure of claim 1, wherein the length of the copper-exposing area is greater than 0.1mm, and the width of the copper-exposing area is 0.1-0.3 mm.

5. The alignment structure of claim 4, wherein the width of the copper-exposed window area is 0.2 mm.

6. The alignment structure of claim 1, wherein the circuit board is a flexible circuit board or a rigid printed circuit board.

7. The circuit board alignment structure of claim 1, wherein the circuit board is a flexible circuit board, and the flexible circuit board comprises: the flexible substrate and the connecting part are positioned on the flexible substrate; the windowing copper exposure area is arranged on the connecting portion, the connecting portion is used for being connected with a connector, and the windowing copper exposure area is used for aligning the flexible circuit board with the connector.

8. The circuit board alignment structure of claim 7, wherein the connection portion further has a limiting protrusion thereon, and the limiting protrusion is used for limiting the insertion depth of the connection portion into the connector.

9. The alignment structure of claim 8, wherein a distance from the position-limiting protrusion to the first edge of the connecting portion is the same as a depth of the connecting portion inserted into the connector.

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