Rigid-flex board auxiliary file automatic design method and auxiliary file

Abstract

The invention discloses an automatic design method for an auxiliary file of a rigid-flex board and the auxiliary file, and the method comprises the steps: firstly distinguishing the shapes of a soft board and a hard board, screening out a corresponding shape region, converting the shape region into a copper sheet attribute, and then carrying out the automatic design of the auxiliary file of the rigid-flex board in a manner of enlarging or reducing the size of a shape copper sheet and negatively stacking the copper sheet. According to the manufacturing method, the distances needing to be guaranteed among different shapes are manufactured, the rigid-flex board auxiliary file is rapidly manufactured, the rigid-flex board auxiliary file meeting the process requirement is obtained, the rigid-flex board auxiliary file can be rapidly and automatically processed and generated, the processing efficiency of the rigid-flex board auxiliary file is improved, and the processing cost is reduced. The error that part of required files are easy to omit during file manufacturing is reduced, the yield of the rigid-flex printed circuit board is improved, the production rejection rate of the rigid-flex printed circuit board is reduced, and the quality of the rigid-flex printed circuit board is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of rigid-flexible board manufacturing, and in particular to an automatic design method of auxiliary files for rigid-flexible boards and auxiliary files. Background Art

[0002] As a material that can meet the needs of complex circuit layout and bending, rigid-flex PCB is increasingly used in high-end electronic products. Especially in the fields of automotive electronics, medical equipment, aerospace, smart wearables, etc., the application of rigid-flex PCB is constantly expanding, driving the growth of market demand.

[0003] Due to the complex process of rigid-flex PCB, the PP sheet on the soft board needs to be milled out during the production process, and the soft board area also needs to be protected by a separate cover film. These two production processes require additional auxiliary files for production and processing. However, the auxiliary file designs of different rigid-flex boards are quite different. When making auxiliary files, the shapes of different soft and hard board areas need to be manually processed, resulting in low efficiency in processing auxiliary files. In addition, some process requirements may be omitted when optimizing auxiliary files, resulting in poor production, which is a serious quality risk and problem for both customers and factories. Summary of the invention

[0004] Based on this, it is necessary to provide a method for automatically designing auxiliary files for rigid-flex boards. This application can realize automatic design of auxiliary files for rigid-flex boards by converting drilling layer files into copper foil and converting copper foil into rigid-flex board shapes, thereby improving the efficiency of making auxiliary files for rigid-flex boards and effectively ensuring that the auxiliary files for rigid-flex boards meet the corresponding process requirements.

[0005] A method for automatically designing auxiliary files of a rigid-flexible board, comprising: Distinguish the soft board area and the hard board area, distinguish the soft board area and the hard board area according to the rigid-flexible board shape file to be processed, and mark them as the first soft board layer and the first hard board layer; Converting the outline file into copper sheet, converting the outline files of the first soft board layer and the first hard board layer into the first copper sheet, reducing the first copper sheet by a preset ratio and locating it in the center area of ​​the outline lines of the first soft board layer and the first hard board layer, and marking them as the second soft board layer and the second hard board layer; The process parameter setting of the milling PP auxiliary file is to increase the first copper sheet of the second soft board layer after the reduction by a first preset size along the edge of the copper sheet, mark it as the third soft board layer, and reduce the first copper sheet of the second hard board layer after the reduction by a second preset size along the edge of the copper sheet, to form a third hard board layer; Milling PP auxiliary file production, superimposing the third hard board layer with the third soft board layer with negative properties to form a milling PP auxiliary file layer; The process parameter setting of the milling cover film auxiliary file is to increase the first copper sheet of the second soft board layer after the reduction by a third preset size along the edge of the copper sheet, marking it as the fourth soft board layer, and to increase the first copper sheet of the second hard board layer after the reduction by a fourth preset size along the edge of the copper sheet, forming a fourth hard board layer; The copper sheets are stacked, and the fourth soft board layer is stacked with the fourth hard board layer with negative properties to form a fifth hard board layer; Drilling layer file preparation, uniformly enlarging the drilling layer file by a fifth preset size on one side and copying it to the fifth hard board layer to form a sixth hard board layer; Milling cover film auxiliary file production, the sixth hard board layer is uniformly integrated into the second copper sheet and the second copper sheet is converted into an outline attribute file to form a milling cover film auxiliary file; Auxiliary file output, the milling PP auxiliary file and the milling cover film auxiliary file are output into corresponding formats, and the automatic design of the auxiliary file of the rigid-flexible combination board is completed.

[0006] In one embodiment, the shape file is converted into copper foil, the shape files of the first soft board layer and the first hard board layer are respectively converted into first copper foils, and the first copper foils are reduced by a preset ratio and located in the center area of ​​the shape lines of the first soft board layer and the first hard board layer, and marked as the second soft board layer and the second hard board layer. The method is: Converting the shape files of the first soft board layer and the first hard board layer into first copper sheets respectively; Filling the first copper sheet with the areas enclosed by the outlines of the first soft board layer and the first hard board layer respectively; The first copper sheet of the first soft board layer is reduced in size according to a preset ratio and positioned in the center area of ​​the outline of the first soft board layer to form a second soft board layer; The first copper sheet of the first hard board layer is reduced in size according to a preset ratio and is located in the center area of ​​the outline of the first hard board layer to form a second hard board layer.

[0007] In one of the embodiments, the outline files of the first soft board layer and the first hard board layer are respectively converted into first copper foils, and the first copper foils are reduced by a preset ratio and located in the center area of ​​the outlines of the first soft board layer and the first hard board layer. Reducing the first copper foil by a preset ratio means reducing the outline of the first copper foil by a preset ratio.

[0008] In one embodiment, the milling PP auxiliary file process parameter setting increases the first copper sheet of the second soft board layer after shrinking by a first preset size along the edge of the copper sheet, marks it as the third soft board layer, and shrinks the first copper sheet of the second hard board layer after shrinking by a second preset size along the edge of the copper sheet, and forms the third hard board layer by: Duplicate the second soft board layer to form a duplicated second soft board layer; Enlarging the first copper sheet of the replicated second soft board layer after shrinking by a first preset size along the edge of the copper sheet to form a third soft board layer; Duplicate the second hard board layer by one layer to form a duplicated second hard board layer; The first copper sheet of the replicated second hard board layer is reduced by a second preset size along the edge of the copper sheet to form a third hard board layer.

[0009] In one embodiment, the milling PP auxiliary file is made by superimposing the third hard board layer with the third soft board layer with negative properties to form the milling PP auxiliary file layer by: superimposing the third hard board layer with the third soft board layer with negative properties; Remove negative attributes; Convert the first copper sheet into a shape linear attribute file; Form the milling PP auxiliary file layer.

[0010] In one of the embodiments, before removing the negative properties, the copper foil smaller than a preset width needs to be removed.

[0011] In one embodiment, the milling cover film auxiliary file process parameter setting increases the first copper sheet of the second soft board layer after shrinking by a third preset size along the edge of the copper sheet, marks it as the fourth soft board layer, and increases the first copper sheet of the second hard board layer after shrinking by a fourth preset size along the edge of the copper sheet, and forms the fourth hard board layer by: Duplicate the second soft board layer to form a duplicated second soft board layer; Enlarging the shrunken first copper sheet of the replicated second soft board layer by a third preset size along the edge of the copper sheet to form a fourth soft board layer; Duplicate the second hard board layer by one layer to form a duplicated second hard board layer; The shrunken first copper sheet of the replicated second hard board layer is enlarged by a fourth preset size along the edge of the copper sheet to form a fourth hard board layer.

[0012] In one embodiment, the copper sheets are stacked, and the fourth soft board layer is superimposed with the fourth hard board layer with negative properties to form a fifth hard board layer, and the fourth soft board layer is covered into the fourth hard board layer to reach a sixth preset size.

[0013] In one of the embodiments, the drilling layer file is produced by uniformly increasing the fifth preset size on one side of the drilling layer file and copying it to the fifth hard board layer to form the sixth hard board layer, and the fifth preset size is ≥0.5 mm.

[0014] In one embodiment, the first preset size is 1mm-3mm, the second preset size is 0.3mm-1mm, the third preset size is 0.5mm-1.5mm, the fourth preset size is 1mm-3mm, and the fifth preset size is 0.5mm-1mm.

[0015] A rigid-flexible board auxiliary file is provided, which is produced according to a rigid-flexible board auxiliary file automatic design method.

[0016] The above-mentioned method for automatically designing auxiliary files of a rigid-flexible board and the beneficial effects of the auxiliary files are: The present application first distinguishes the shapes of soft boards and hard boards, selects the corresponding shape areas and converts them into copper properties, then increases or decreases the size of the copper skin and negatively stacks the copper skin to produce the spacing required between different shapes, quickly produces auxiliary files for rigid-flex boards, and obtains auxiliary files for rigid-flex boards that meet process requirements. The application can quickly and automatically process and generate auxiliary files for rigid-flex boards, improve the processing efficiency of auxiliary files for rigid-flex boards, reduce errors in production files that easily result in omission of some required files, improve the yield rate of rigid-flex boards, reduce the scrap rate of rigid-flex boards, and improve the quality of rigid-flex boards. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic flow chart of the automatic design method of the auxiliary file of the rigid-flex board of the present invention; Figure 2 for Figure 1 A schematic flow chart of a method for converting an outline file of the automatic design method of the auxiliary file of a rigid-flex board of the present invention into a method for making a copper sheet; Figure 3 for Figure 1 A schematic flow chart of a method for setting process parameters of a milling PP auxiliary file in the method for automatically designing auxiliary files for a rigid-flexible board according to the present invention; Figure 4 for Figure 1 A schematic flow chart of a method for preparing a milling PP auxiliary file in the method for automatically designing auxiliary files for a rigid-flexible board according to the present invention; Figure 5 for Figure 1 A schematic flow chart of a method for setting process parameters of a milling cover film auxiliary file in the method for automatically designing auxiliary files for a rigid-flex board of the present invention; Figure 6 A schematic diagram of the PP auxiliary file structure of the rigid-flex board auxiliary file of the present invention; Figure 7 It is a schematic diagram of the structure of the covering film auxiliary file of the rigid-flexible board auxiliary file of the present invention. DETAILED DESCRIPTION

[0018] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific embodiments of the present invention are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present invention, so the present invention is not limited by the specific embodiments disclosed below.

[0019] It should be noted that when an element is considered to be "connected" to another element, it may be directly connected to the other element or there may be an intermediate element at the same time. On the contrary, when an element is said to be "directly" connected to another element, there is no intermediate element.

[0020] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0021] like Figure 1 As shown, a method for automatically designing auxiliary files of a rigid-flexible board includes: S1. Distinguish the soft board area and the hard board area, distinguish the soft board area and the hard board area according to the rigid-flexible board shape file to be processed, and mark them as the first soft board layer and the first hard board layer; distinguish the soft board area and the hard board area into different layers, and mark them as the first soft board layer and the first hard board layer; the soft board area and the hard board area may be regular graphics or irregular drawings; like Figure 2 As shown, S2, converting the shape file into copper skin, converting the shape files of the first soft board layer and the first hard board layer into the first copper skin, and reducing the first copper skin by a preset ratio and locating it in the center area of ​​the shape lines of the first soft board layer and the first hard board layer, and marking them as the second soft board layer and the second hard board layer; S21, converting the shape files of the first soft board layer and the first hard board layer into first copper sheets respectively; S22, filling the areas enclosed by the outlines of the first soft board layer and the first hard board layer with the first copper sheet respectively; S23, the first copper sheet of the first soft board layer is reduced by a preset ratio and located in the center area of ​​the outline of the first soft board layer, so as to form a second soft board layer; reducing the first copper sheet by a preset ratio means reducing the outline of the first copper sheet by a preset ratio, the outline of the first copper sheet is a closed area formed by splicing a plurality of line segments, reducing the outline by a preset ratio usually means shortening the outline segment, for example, the length of the outline segment is 0.6mm, then it becomes 0.3mm after being shortened by half, and after all the outline segments are reduced by half, the position of the reduced first copper sheet is the center area of ​​the outline of the first soft board layer; the first copper sheet of the first soft board layer is reduced by a preset ratio to form a second soft board layer; S24, the first copper sheet of the first hard board layer is reduced in a preset ratio and located in the center area of ​​the outline of the first hard board layer to form a second hard board layer; the first copper sheet of the first hard board layer is reduced in the same manner as the first soft board layer, so that the position of the reduced first copper sheet is the center area of ​​the outline of the first hard board layer; the first copper sheet of the first hard board layer is reduced in a preset ratio to form a second hard board layer; like Figure 3 As shown, S3, milling PP auxiliary file process parameter setting, the first copper sheet of the second soft board layer after shrinking is enlarged by a first preset size along the edge of the copper sheet, marked as the third soft board layer, and the first copper sheet of the second hard board layer after shrinking is reduced by a second preset size along the edge of the copper sheet to form a third hard board layer; the enlarged or reduced sizes of the first copper sheet of the second soft board layer and the first copper sheet of the second hard board layer are set according to specific requirements; S31, replicating the second soft board layer by one layer to form a replicated second soft board layer; S32, enlarging the first copper foil of the second soft board layer after the reduction along the edge of the copper foil by a first preset size to form a third soft board layer; for example, enlarging the first copper foil of the second soft board layer along the edge of the copper foil by 2 mm according to specific production requirements, S33, replicating the second hard board layer by one layer to form a replicated second hard board layer; S34, shrinking the first copper sheet of the second hard board layer along the edge of the copper sheet by a second preset size to form a third hard board layer; shrinking the first copper sheet of the second soft board layer by 0.5 mm along the edge of the copper sheet according to specific production requirements, like Figure 4 As shown, S4, milling PP auxiliary file production, the third hard board layer is superimposed with the third soft board layer with negative properties to form a milling PP auxiliary file layer; S41, superimposing the third hard board layer with the third soft board layer with negative properties; after superimposing the third hard board layer with the third soft board layer with negative properties, some small connection positions will be generated. For example, if the connection position is less than 1mm, then before removing the negative properties, the copper foil with a width of less than 1mm needs to be removed.

[0022] In circuit board design, negative properties are used to process the interface between the rigid and flexible boards of a circuit board. By superimposing the copper pattern of one area with negative properties (i.e. after flipping) on ​​the copper pattern of another area, the tiny connections created by the superposition of the rigid and flexible boards can be eliminated, ensuring that the rigid and flexible parts of the circuit board can be properly separated while maintaining connections where the rigid and flexible boards of the circuit board need to be connected.

[0023] S42, remove the negative attributes; S43, converting the first copper sheet into a shape linear attribute file; S44, forming a milling PP auxiliary file layer; like Figure 5 As shown, S5, the process parameter setting of the milling cover film auxiliary file is to increase the first copper sheet of the second soft board layer after the reduction by a third preset size along the edge of the copper sheet, mark it as the fourth soft board layer, and increase the first copper sheet of the second hard board layer after the reduction by a fourth preset size along the edge of the copper sheet, to form a fourth hard board layer; S51, replicating the second soft board layer by one layer to form a replicated second soft board layer; S52, enlarging the first copper foil of the second soft board layer after the reduction along the edge of the copper foil by a third preset size to form a fourth soft board layer; in this embodiment, the soft board needs to be pressed by 1mm, so the first copper foil of the second soft board layer is enlarged by 1mm along the edge of the copper foil; S53, replicating the second hard board layer by one layer to form a replicated second hard board layer; S54, enlarging the first copper sheet of the second hard board layer after the reduction along the edge of the copper sheet by a fourth preset size to form a fourth hard board layer; in this embodiment, the covering film of the hard board area needs to be milled by 2 mm, so the first copper sheet of the second hard board layer is enlarged by 2 mm along the edge of the copper sheet; S6, copper sheets are stacked, and the fourth soft board layer is stacked with the fourth hard board layer with negative properties to form a fifth hard board layer; copper sheets are stacked, and the fourth soft board layer is stacked with the fourth hard board layer with negative properties to form a fifth hard board layer, and the fourth soft board layer is covered into the fourth hard board layer to reach a sixth preset size, that is, the fourth soft board layer is covered into the fourth hard board layer by 1MM, ensuring that the covering film extends into the board; S7, drilling layer file preparation, the drilling layer file is uniformly enlarged by the fifth preset size on one side and copied to the fifth hard board layer to form the sixth hard board layer; because the metallized hole needs to be at least 0.5MM away from the soft board cover film area, so for the preparation of the drilling layer file, the drilling layer file is uniformly enlarged by at least 0.5mm on one side and copied to the fifth hard board layer to form the sixth hard board layer; S8, milling cover film auxiliary file production, the sixth hard board layer is unified into the second copper skin and the second copper skin is converted into an outline attribute file to form a milling cover film auxiliary file; S9. Auxiliary file output: output the milling PP auxiliary file and the milling cover film auxiliary file into corresponding formats to complete the automatic design of the rigid-flexible board auxiliary file.

[0024] The first preset size is 1mm-3mm, the second preset size is 0.3mm-1mm, the third preset size is 0.5mm-1.5mm, the fourth preset size is 1mm-3mm, and the fifth preset size is 0.5mm-1mm. When the PP milling slot needs to be enlarged by 1 mm-3 mm, the first copper sheet of the second soft board layer increases the first preset size along the edge of the copper sheet, that is, the first copper sheet of the second soft board layer increases by 1mm-3mm; When the junction between the second hard board layer and the second soft board layer needs to be enlarged by 0.3 mm-1.0 mm, the first copper sheet of the second hard board layer is reduced by a second preset size along the edge of the copper sheet, and the first copper sheet of the second hard board layer is reduced by 0.3 mm-1.0 mm; When the edge of the covering film soft board is pressed by 0.5 mm-1.5 mm, the first copper sheet of the second soft board layer after shrinking is enlarged by a third preset size along the edge of the copper sheet, and the first copper sheet of the second soft board layer is enlarged by 0.5 mm-1.5 mm; When the milling groove is enlarged by 1.0 mm to 3.0 mm compared to the hard board area, the first copper sheet of the second hard board layer after the reduction is enlarged by a fourth preset size along the edge of the copper sheet, and the first copper sheet of the second hard board layer after the reduction is enlarged by 1.0 mm to 3.0 mm; When the metallized hole is 0.5mm-1.0mm away from the flexible board covering film area, the drilling layer file is uniformly enlarged on one side by the fifth preset size, and the drilling layer file is uniformly enlarged on one side by 0.5mm-1.0mm.

[0025] like Figure 6 and Figure 7 As shown, a rigid-flexible board auxiliary file is a rigid-flexible board auxiliary file produced according to the rigid-flexible board auxiliary file automatic design method.

[0026] In this way, the present application first distinguishes the shapes of the soft board and the hard board, selects the corresponding shape areas and converts them into copper foil properties, and then increases or decreases the size of the copper foil and negatively stacks the copper foil to produce the spacing that needs to be ensured between different shapes, and quickly produces the auxiliary files of the rigid-flexible board to obtain the auxiliary files of the rigid-flexible board that meet the process requirements. The auxiliary files of the rigid-flexible board can be quickly and automatically processed and generated, thereby improving the processing efficiency of the auxiliary files of the rigid-flexible board, reducing the errors in the production files that are easy to omit some required files, thereby improving the yield of the production of rigid-flexible boards, reducing the scrap rate of the production of rigid-flexible boards and improving the quality of the rigid-flexible boards.

[0027] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0028] The above-mentioned embodiments only express several implementation methods of the present invention, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the invention patent. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be subject to the attached claims.

Claims

1. A method for automatically designing auxiliary files for rigid-flex boards, characterized in that: include Distinguish the soft board area and the hard board area, distinguish the soft board area and the hard board area according to the rigid-flexible board shape file to be processed, and mark them as the first soft board layer and the first hard board layer; Converting the outline file into copper sheet, converting the outline files of the first soft board layer and the first hard board layer into the first copper sheet, reducing the first copper sheet by a preset ratio and locating it in the center area of ​​the outline lines of the first soft board layer and the first hard board layer, and marking them as the second soft board layer and the second hard board layer; The process parameter setting of the milling PP auxiliary file is to increase the first copper sheet of the second soft board layer after the reduction by a first preset size along the edge of the copper sheet, mark it as the third soft board layer, and reduce the first copper sheet of the second hard board layer after the reduction by a second preset size along the edge of the copper sheet, to form a third hard board layer; Milling PP auxiliary file production, superimposing the third hard board layer with the third soft board layer with negative properties to form a milling PP auxiliary file layer; The process parameter setting of the milling cover film auxiliary file is to increase the first copper sheet of the second soft board layer after the reduction by a third preset size along the edge of the copper sheet, marking it as the fourth soft board layer, and to increase the first copper sheet of the second hard board layer after the reduction by a fourth preset size along the edge of the copper sheet, forming a fourth hard board layer; The copper sheets are stacked, and the fourth soft board layer is stacked with the fourth hard board layer with negative properties to form a fifth hard board layer; Drilling layer file preparation, uniformly enlarging the drilling layer file by a fifth preset size on one side and copying it to the fifth hard board layer to form a sixth hard board layer; Milling cover film auxiliary file production, the sixth hard board layer is uniformly integrated into the second copper sheet and the second copper sheet is converted into an outline attribute file to form a milling cover film auxiliary file; Auxiliary file output, the milling PP auxiliary file and the milling cover film auxiliary file are output into corresponding formats, and the automatic design of the auxiliary file of the rigid-flexible combination board is completed.

2. The method for automatic design of auxiliary files for rigid-flex boards according to claim 1, characterized in that: The method of converting the shape file into copper foil, converting the shape files of the first soft board layer and the first hard board layer into first copper foils respectively, reducing the first copper foils by a preset ratio and locating them in the center area of ​​the shape lines of the first soft board layer and the first hard board layer, and marking them as the second soft board layer and the second hard board layer is as follows: Converting the shape files of the first soft board layer and the first hard board layer into first copper sheets respectively; Filling the first copper sheet with the areas enclosed by the outlines of the first soft board layer and the first hard board layer respectively; The first copper sheet of the first soft board layer is reduced in size according to a preset ratio and positioned in the center area of ​​the outline of the first soft board layer to form a second soft board layer; The first copper sheet of the first hard board layer is reduced in size according to a preset ratio and is located in the center area of ​​the outline of the first hard board layer to form a second hard board layer.

3. The method for automatically designing auxiliary files for rigid-flex boards according to claim 2, characterized in that: The outline files of the first soft board layer and the first hard board layer are respectively converted into first copper foils, and the first copper foils are reduced by a preset ratio and located in the center area of ​​the outline lines of the first soft board layer and the first hard board layer. Reducing the first copper foil by a preset ratio means reducing the outline line of the first copper foil by a preset ratio.

4. The method for automatically designing auxiliary files for rigid-flex boards according to claim 2, characterized in that: The milling PP auxiliary file process parameter setting increases the first copper sheet of the second soft board layer after shrinking by a first preset size along the edge of the copper sheet, marks it as the third soft board layer, and shrinks the first copper sheet of the second hard board layer after shrinking by a second preset size along the edge of the copper sheet, and forms the third hard board layer by: Duplicate the second soft board layer to form a duplicated second soft board layer; Enlarging the first copper sheet of the replicated second soft board layer after shrinking by a first preset size along the edge of the copper sheet to form a third soft board layer; Duplicate the second hard board layer by one layer to form a duplicated second hard board layer; The first copper sheet of the replicated second hard board layer is reduced by a second preset size along the edge of the copper sheet to form a third hard board layer.

5. The method for automatically designing auxiliary files for rigid-flex boards according to claim 4, characterized in that: The method for making the milling PP auxiliary file and superimposing the third hard board layer with the third soft board layer with negative properties to form the milling PP auxiliary file layer is: superimposing the third hard board layer with the third soft board layer with negative properties; Remove negative attributes; Convert the first copper sheet into a shape linear attribute file; Form the milling PP auxiliary file layer.

6. The method for automatically designing auxiliary files for rigid-flex boards according to claim 5, characterized in that: Before removing the negative properties, the copper foil smaller than the preset width needs to be removed.

7. The method for automatically designing auxiliary files for rigid-flex boards according to claim 6, characterized in that: The milling cover film auxiliary file process parameter setting is to increase the first copper sheet of the second soft board layer after shrinking by a third preset size along the edge of the copper sheet, mark it as the fourth soft board layer, and increase the first copper sheet of the second hard board layer after shrinking by a fourth preset size along the edge of the copper sheet, and form the fourth hard board layer by: Duplicate the second soft board layer to form a duplicated second soft board layer; Enlarging the shrunken first copper sheet of the replicated second soft board layer by a third preset size along the edge of the copper sheet to form a fourth soft board layer; Duplicate the second hard board layer by one layer to form a duplicated second hard board layer; The shrunken first copper sheet of the replicated second hard board layer is enlarged by a fourth preset size along the edge of the copper sheet to form a fourth hard board layer.

8. The method for automatically designing auxiliary files for rigid-flex boards according to claim 1, characterized in that: The copper sheets are stacked, and the fourth soft board layer is superimposed on the fourth hard board layer with a negative property to form a fifth hard board layer, and the fourth soft board layer is covered into the fourth hard board layer to reach a sixth preset size.

9. The method for automatically designing auxiliary files for rigid-flex boards according to claim 1, characterized in that: The drilling layer file is produced by uniformly increasing the fifth preset size on one side of the drilling layer file and copying it to the fifth hard board layer to form the sixth hard board layer, and the fifth preset size is ≥0.5mm.

10. A rigid-flex board auxiliary file, characterized by: A rigid-flexible board auxiliary file produced by the method for automatically designing a rigid-flexible board auxiliary file according to any one of claims 1 to 9.

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