A method for detecting the welding pad capability of a UV laser cutting machine

Abstract

The application provides a detection method for the welding pad capacity of a UV laser cutting machine, which burns a five-point star welding pad on a single flexible core plate by the UV laser cutting machine, and evaluates the welding pad capacity of the UV laser cutting machine according to the burning quality of the five-point star welding pad. The application can more accurately evaluate the welding pad capacity of the UV laser cutting machine by burning the special-shaped welding pad in the shape of a five-point star, compared with the burning of the regular square, circular and elliptical welding pads, so as to further judge whether the UV laser cutting machine can meet the actual production required welding pad capacity, and ensure that the imported laser equipment can meet the product demand.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of laser cutting machines, in particular to a detection method for the pad burning capacity of a UV laser cutting machine. BACKGROUND

[0002] With the development of electronic products towards multi-function, small size, light weight and high performance, FPC printed circuit boards are increasingly in demand due to their three-dimensional 360° installation characteristics. The UV laser cutting machine, one of the essential equipment for FPC production, is often tested for its pad burning capacity during the equipment evaluation and introduction stage as a basis for introduction.

[0003] The scanning range of the laser head of a conventional UV laser cutting machine is 40*40mm. Currently, when testing the pad burning capacity of a UV laser cutting machine, small-sized circular pads and square pads are usually designed. The size of such conventional circular pads and square pads is within 40*40mm, within the scanning range of the laser head, without overlapping areas and simple patterns, which cannot accurately evaluate whether the UV laser cutting machine can meet the actual production requirements for pad burning capacity, thereby leading to the imported equipment being unable to meet the final product requirements. SUMMARY

[0004] The present application aims to provide a detection method for the pad burning capacity of a UV laser cutting machine to solve the problem that the existing detection method cannot accurately evaluate the pad burning capacity of a UV laser cutting machine.

[0005] To achieve the above-mentioned purpose, the technical solution of the present application is as follows:

[0006] A detection method for the pad burning capacity of a UV laser cutting machine, which burns a pentagram pad on a single flexible core board by a UV laser cutting machine, and evaluates the pad burning capacity of the UV laser cutting machine according to the burning quality of the pentagram pad.

[0007] Further, the diameter of the pentagram pad is greater than the scanning range of the laser head of the UV laser cutting machine.

[0008] Further, the diameter of the pentagram pad is 100mm.

[0009] Further, the single flexible core board comprises a copper foil and a PI film covering the copper foil; the laser beam emitted by the UV laser cutting machine burns off the exposed copper foil of the PI film to form a pad.

[0010] Further, the thickness of the PI film is 50-75um, and the thickness of the copper foil is 12-18um.

[0011] Further, the rough surface of the copper foil is attached to the PI film.

[0012] Further, the evaluation of the UV laser cutting machine's pad burning capacity according to the pad burning quality of the five-point star pad includes: the burned pad is continuous, the copper foil is not burned through, no black line, and no tail, and the UV laser cutting machine's pad burning capacity meets the requirements.

[0013] The excellent UV laser cutting machine can effectively process the special-shaped area, the overlapping area, and the size exceeding the scanning head field of view area, and solve the problems of the burned pad being continuous, the copper foil being not burned through, no black line, and no tail, etc. The ordinary UV laser cutting equipment cannot well handle these situations, and problems such as copper foil burning, black line in the overlapping area of two scanning fields of view, and the burned pad being discontinuous, etc. may occur. The present application can more accurately evaluate the pad burning capacity of the UV laser cutting machine by burning the five-point star-shaped special-shaped pad compared with the pad burning of regular square, circular, and elliptical pads, and further judge whether the UV laser cutting machine can meet the actual production required pad burning capacity, and ensure that the imported laser equipment can meet the product demand. BRIEF DESCRIPTION OF DRAWINGS

[0014] The accompanying drawings, which form a part of the present description, are included to provide a further understanding of the application, and are incorporated herein for purposes of illustrating the illustrative embodiments of the present application and the explanations provided herein.

[0015] Figure 1 The flowchart of the detection method of the embodiment of the present application is shown in Figure 1.

[0016] Figure 2 The structure diagram of the five-point star pad of the embodiment of the present application is shown in Figure 2.

[0017] Figure 3 The effect diagram of the five-point star pad burned by the UV laser cutting machine meeting the product demand is shown in Figure 3.

[0018] Figure 4 The effect diagram of the five-point star pad burned by the UV laser cutting machine not meeting the product demand is shown in Figure 4.

[0019] Wherein: 1-cylinder wall; 2-PI film. DETAILED DESCRIPTION

[0020] The present application will be described in detail below with reference to the accompanying drawings and in conjunction with the embodiments. It should be noted that the embodiments in the present application and the features in the embodiments can be combined with each other without conflict.

[0021] It should be noted that the following detailed description is exemplary and is intended to provide further explanation of the present application. Unless otherwise specified, all technical and scientific terms used herein have the same meaning as generally understood by those skilled in the art to which the present application belongs.

[0022] It is to be understood that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises" and / or "comprising," when used in this specification, specify the presence of stated features, steps, operations, elements, components, and / or groups thereof, but do not preclude the presence or addition of one or more other features, steps, operations, elements, components, and / or groups thereof.

[0023] Currently, in the equipment evaluation import stage, the UV laser cutting machine is tested for the ability to burn pads, which are usually designed as small-sized circular pads and square pads. The size of such conventional circular pads and square pads is generally within 40*40mm, which is within the scanning range of the laser head of the UV laser cutting machine, has no overlapping area and simple graphics, and thus cannot accurately evaluate whether the UV laser cutting machine can meet the actual production requirement for the ability to burn pads, thereby causing the imported equipment to be unable to meet the final product requirement.

[0024] To this end, the present application provides a method for detecting the ability of a UV laser cutting machine to burn pads, so as to solve the problem that the existing detection method cannot accurately evaluate the ability of the UV laser cutting machine to burn pads. The method will be described below in combination with Figures 1 to 4 The method for detecting the ability of a UV laser cutting machine to burn pads provided by the present application will be described exemplarily.

[0025] As shown in Figure 1 The present embodiment provides a method for detecting the ability of a UV laser cutting machine to burn pads, which burns a star pentagon pad on a single flexible core plate by using the UV laser cutting machine, and evaluates the ability of the UV laser cutting machine to burn pads according to the burning quality of the star pentagon pad.

[0026] First, a cutting program is created in the UV laser cutting machine, a star pentagon part drawing is drawn by using CAD software or the like, and is saved in a format that can be read into and edited by the nesting software of the UV laser cutting machine, such as a DXF format. Then, the star pentagon part drawing is processed and nested on the nesting software, and is converted into NC codes corresponding to the manufacturer of the UV laser cutting machine, so as to complete the creation of the cutting program. Of course, the star pentagon part drawing can also be created directly on the nesting software of the UV laser cutting machine, which is not limited in the present embodiment.

[0027] Then, a single flexible core plate is prepared, which mainly comprises a copper foil 1 and a PI (polyimide) film 2 covering the copper foil 1. The thickness of the PI film 2 is 50-75um, and the thickness of the copper foil 1 is 12-18um. The rough surface of the copper foil 1 is attached to the PI film 2. The single flexible core plate is fixed to the workbench of the UV laser cutting machine, and the UV laser cutting machine is started. The UV laser beam ablates the material according to the path created by the above program, specifically, the PI film 2 in the star pentagon area is burned off to expose the copper foil 1, so as to obtain a star pentagon pad as shown in Figure 2 .

[0028] Finally, according to the firing quality of the five-star pad, the ability of the UV laser cutting machine to fire the pad is evaluated, specifically, the excellent UV laser cutting machine can effectively process the special-shaped area, the overlapping area, and the area whose size exceeds the field of view of the scanning head, the fired pad is continuous, and the copper foil has no problems such as burning through, black line, and tail, while the ordinary UV laser cutting equipment cannot well handle these situations, and problems such as copper foil burning through, black line in the overlapping area of two scanning fields of view, and discontinuous pad firing may occur, and accordingly, the ability of the UV laser cutting machine to fire the pad can be evaluated.

[0029] It can be seen that, by allowing the UV laser cutting machine to fire the special-shaped five-star pad, compared with the firing of regular square, circular, and elliptical pads, it can more accurately evaluate whether the UV laser cutting machine can meet the actual production requirement of the pad firing ability, and ensure that the imported laser equipment can meet the product demand.

[0030] In order to further evaluate the pad firing ability of the UV laser cutting machine, the diameter of the five-star is greater than the scanning range of the laser head of the UV laser cutting machine (40*40mm), that is, a five-star pad with a size greater than the scanning range of the laser head needs to be fired, preferably, the diameter of the five-star is 100mm, that is, a five-star pad with a diameter of 100mm needs to be fired.

[0031] Generally, the ablation principle of the UV laser cutting machine is to use a 1mil width UV beam to ablate the material, and the cumulative 1mil width laser beam realizes ablation of a certain area size, when the size of the fired pad exceeds the scanning range of the laser head, different regions of the pad will appear at the junction, which is called the connection position, and the processing of the connection position can reflect the equipment level of each manufacturer, when a five-star pad with a diameter of 100mm is fired, the processing effect of the connection position (the processing of the connection position is an ultimate effect obtained by different processing methods of the file line at the connection position) can be well detected, Figure 3 In the case of a five-star pad, the entire pad has no obvious boundary, and in the case of Figure 4 In the case of a five-star pad, the corner of the pad has obvious connection lines (the position circled in the figure).

[0032] From the above description, it can be seen that the above-mentioned embodiments of the present application achieve the following technical effects:

[0033] By firing the five-star shaped pad, the present application can cover all the pad firing capabilities of the circuit board, and the processing of this special-shaped pad is more difficult than the regular square, circular, and elliptical pads, therefore, whether the UV laser cutting machine can meet the actual production requirement of the pad firing ability can be accurately evaluated, and it is ensured that the imported laser equipment can meet the product demand.

[0034] In the description of the present application, it needs to be understood that the orientation or positional relationship indicated by the terms "center", "front, back, upper, lower, left, right", "transverse, vertical, perpendicular, horizontal" and "top, bottom" and the like are generally based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and in the absence of contrary description, these orientation words do not indicate and imply that the devices or elements referred to must have a particular orientation or be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the scope of protection of the present application; the orientation words "inner, outer" refer to the inner and outer relative to the contour of each component.

[0035] In the description of the present application, it needs to be understood that unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connection" should be understood broadly, for example, it can be fixed connection, or detachable connection, or integral connection; it can be mechanical connection, or electrical connection; it can be directly connected, or indirectly connected through intermediate medium, or the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances

[0036] In addition, it needs to be pointed out that the use of "first", "second" and the like to limit parts is only for the convenience of distinguishing the corresponding parts, and if there is no further declaration, the above words have no special meaning, and therefore cannot be understood as a limitation on the scope of protection of the present application.

[0037] The above is only the preferred embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application shall be included in the scope of protection of the present application.

Claims

1. A method for detecting the ability of a UV laser cutting machine to weld pads, characterized in that: The five-star welding pad is burned on the single flexible core plate by a UV laser cutting machine, and the welding pad burning capacity of the UV laser cutting machine is evaluated according to the burning quality of the five-star welding pad; The diameter of the five-star welding pad is greater than the scanning range of the laser head of the UV laser cutting machine; The diameter of the five-star welding pad is 100 mm.

2. The method of claim 1, wherein: The single flexible core plate comprises a copper foil and a PI film covering the copper foil; the laser beam emitted by the UV laser cutting machine burns the exposed copper foil of the PI film to form a welding pad.

3. The method of claim 2, wherein: The thickness of the PI film is 50-75 um, and the thickness of the copper foil is 12-18 um.

4. The method of claim 3, wherein: The rough surface of the copper foil is attached to the PI film.

5. The method of claim 2, wherein: The welding pad burning capacity of the UV laser cutting machine is evaluated according to the burning quality of the five-star welding pad, which includes that the burned welding pad is continuous, the copper foil is not burned through, has no black line, and has no tail, and the welding pad burning capacity of the UV laser cutting machine meets the requirements.

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