TWI682480B - Layout system for a printed circuit board - Google Patents

Abstract

A layout system for a printed circuit board is provided to solve the problem where the conductivity of the circuit board degrades due to the erosion at the terminal of the electrical trace. The layout system includes a database configured to store a plurality of layout paths and a plurality of specifications respectively corresponding to the plurality of layout paths, and a processing module coupled with the database and configured to measure and adjust a layout pattern of a printed circuit board. The processing module compares the layout pattern of the printed circuit board with the plurality of layout paths and the plurality of specifications such that the layout pattern matches the plurality of specifications.

Description

Printed circuit board wiring system

The invention relates to a technique for improving the manufacturing process of a printed circuit board, in particular to a printed circuit board wiring system for modifying the shape of the end of a circuit.

In response to the development trend of miniaturization, light weight and high performance of electronic products, the circuit layout technology of printed circuit boards must be able to complete products with high-density wiring and pattern line width refinement. After the pattern of the printed circuit board is completed, it is necessary to make a negative film, and then the circuit pattern is formed on the substrate through exposure, etching, printing and other processes.

Please refer to FIG. 1, which is a circuit pattern of a conventional printed circuit board. The circuit terminal T of the conventional printed circuit board is usually at a right angle. However, when the conventional printed circuit board has a miniaturized pattern, The end of the circuit or the corner of the pattern is easy to be eroded during the etching process. As shown in Figure 2, the result of the erosion is to cause unexpected irregular bumps N at the end of the circuit T. When the printed circuit board is energized for circuit power During the performance test, the tip-discharge phenomenon is prone to occur at the uneven deformation, which leads to damage, discoloration and scrapping of the printed circuit board.

In view of this, the conventional printed circuit board circuit layout mode still needs to be improved.

In order to solve the above problems, the object of the present invention is to provide a printed circuit board wiring system, which can reduce the etching process to the wiring pattern erosion, so as to improve the printed circuit board electrical test yield.

The next object of the present invention is to provide a printed circuit board wiring system that can quickly improve wiring patterns to save manpower and man-hours.

Another object of the present invention is to provide a printed circuit board wiring system that can be applied to various circuit patterns and increase the working range of circuit modification.

The printed circuit board wiring system of the present invention includes: a database for storing several circuit diagrams and several specification conditions of each circuit diagram, the several specification conditions including a first reference value and a second reference Value, a first change amount and a second change amount; and a processing module for measuring and adjusting the wiring pattern of a printed circuit board's wiring diagram, the processing module is coupled to the database, and the processing module Compare the circuit diagram of the printed circuit board with the various circuit diagrams and specifications in the database, when the pattern width at one end of the circuit diagram of the printed circuit board is less than the first reference value , The processing module adjusts the end according to the first change amount, and when the pattern width at one end of the circuit diagram is between the first reference value and the second reference value, the processing module adjusts the A round head shape is formed at the end, and the radius at the end is half of the width of the pattern. When the width of the pattern at one end of the circuit diagram is greater than the second reference value, the processing module is based on the second The amount of change is adjusted at that end.

The printed circuit board wiring system of the present invention includes: a database for storing several circuit diagrams and several specification conditions of each circuit diagram, the several specification conditions including a first reference value and a first change And a second amount of change; and a processing module for measuring and adjusting the wiring pattern of a printed circuit board circuit diagram, the processing module is coupled to the database, and the processing module compares the printed circuit board Circuit diagram, and several circuit diagrams and specifications in the database, when the pattern width at one end of the circuit diagram of the printed circuit board is less than the first reference value, the processing module The first change adjusts the end. When the pattern width at one end of the circuit diagram is greater than or equal to the first reference value, the processing module adjusts the end according to the second change.

According to this, the printed circuit board wiring system of the present invention can detect and modify the wiring pattern of the printed circuit board according to the set specifications and conditions, which can avoid over-etching and damage the integrity of the circuit, improve product yield and save circuit debugging The effect of manpower and time required.

Wherein, the processing module has an identification unit and a modification unit, the identification unit measures the wiring pattern of the circuit diagram of the printed circuit board, and the modification unit adjusts the wiring pattern of the circuit diagram. In this way, it has the effect of analyzing labor and improving wiring patterns.

Among them, the first reference value is 7 to 27 μm. In this way, it has the effect of limiting the width of the line that needs to be modified.

Among them, the second reference value is 28 to 35 μm. In this way, it has the effect of limiting the width of the line that needs to be modified.

Wherein, the first change amount is a tip length, the tip length is extended at the end, and a tip shape is formed at the end, and the tip length is 13 μm-20 μm. In this way, there is an increase in the effective extension range at the end of the prong.

Wherein, when the surrounding space at the end is insufficient to extend the length of the prong, the prong at the end is truncated by a prong intercept to form a flat head shape at the end. In this way, it has the effect of avoiding short-circuit due to insufficient distance between wires.

Among them, the tip intercept is 6~8μm. In this way, it has the effect of ensuring sufficient space between the lines.

Wherein, the second change amount is an arc radius, and the corner position at the end forms a rounded corner with the arc radius, and the arc radius is 5 μm to 20 μm. In this way, it has an effective range for increasing the effect of dispersing and etching the rounded corner.

In order to make the above and other objects, features and advantages of the present invention more obvious and easy to understand, the following is a detailed description of preferred embodiments of the present invention, in conjunction with the attached drawings, as follows:

Please refer to FIG. 3, which is a preferred embodiment of the printed circuit board wiring system of the present invention, which includes a database 1 and a processing module 2, the processing module 2 is coupled to the database 1, the processing The module 2 processes a circuit diagram G of one of the printed circuit boards.

The database 1 can be any type of storage device (such as electrical, magnetic, optical, etc.) that records digital information. The database 1 is used to store, retrieve, and classify several circuit diagrams G and each of the circuits As shown in FIG. 4, several specification conditions of FIG. G include a first reference value and a second reference value of a pattern width W; the specification conditions also include a first change And a second change amount, the first change amount may be a tip length L, the second change amount may be an arc radius R; the specifications may also include a tip intercept S.

Please refer to FIG. 3, the processing module 2 can have an identification unit 21 and a modification unit 22, the identification unit 21 can measure and analyze the wiring pattern of the circuit diagram G of a printed circuit board, the modification unit 22 The wiring pattern of this wiring diagram G can be adjusted. The processing module 2 preferably has functions such as data processing, image output, and calculation, such as a personal computer. Thus, the processing module 2 can quickly exchange data with the database 1 and display the circuit diagram G in real time As a result of the modification, the processing module 2 can also be equipped with Electronic Design Automation (EDA) software to automatically analyze and verify the circuit layout.

Referring to Figures 3 and 4, according to the foregoing structure, the identification unit 21 finds the ends of the lines and the corners of the patterns on the circuit diagram G to be modified, and measures the ends and edges The width W of the pattern at the corner, and then the processing module 2 compares each of the pattern width W with several circuit diagrams G and several specifications in the database 1, and according to the comparison result, the processing module 2 The wiring pattern of the circuit diagram G of the printed circuit board can be adjusted by the modification unit 22 so that the circuit diagram G meets the specifications.

When the pattern width W at one end of the circuit diagram G is smaller than the first reference value, the modification unit 22 adjusts the line extension to form a pointed shape at the end, where the first reference value can be selected as 7 ~27μm, and the distance between the end before adjustment and the adjusted tip is the tip length L, the tip length L is preferably 13μm~20μm and the best is 20μm, in addition, when the surrounding space at the end is not enough When the line is extended by the tip length L, the modification unit 22 cuts the tip at the end, and the shortened length of the line is the tip intercept S, and the tip intercept S is preferably 6-8 μm. As shown in Figure 5, during the etching process of the printed circuit board, the tip-shaped end begins to erode, so that the finished printed circuit board has a round-end-shaped line end, reducing the tip discharge phenomenon. The probability of causing damage to the printed circuit board.

When the pattern width W at one end of the circuit diagram G is between the first reference value and the second reference value, the modification unit 22 adjusts the circuit to form a round head at the end, where the first The reference value system can be selected as 7~27μm and the second reference value system can be selected as 28~35μm, and the radius of the round head at the end is half of the width W of the pattern; or, the modification unit 22 can also Adjust the circuit so that the corner position at the end forms a rounded corner, wherein the radius of the rounded corner is the arc corner radius R, and the arc corner radius R is preferably 5 μm~(W/2) μm. Since the end points of the circuit diagram G presenting acute or right angles are easy to absorb the etching liquid, which leads to excessive erosion during the etching process, relatively speaking, after adjustment by the modification unit 22, the round head and the round corners of the circuit diagram G Can slow down the influence of etching liquid.

When the pattern width W at one end of the circuit diagram G is greater than the second reference value, the modification unit 22 adjusts the circuit so that the corner position at the end forms a rounded corner, where the second reference value can be The selection is 28 to 35 μm, and the radius of the rounded corner is the arc radius R, and the arc angle radius R is preferably 5 μm to 20 μm.

In summary, the printed circuit board wiring system of the present invention can detect and modify the wiring pattern of the printed circuit board according to the set specifications and conditions, which can avoid excessive etching and damage the integrity of the circuit, and improve the product yield and save the circuit. Wrong manpower and time required.

Although the present invention has been disclosed using the above-mentioned preferred embodiments, it is not intended to limit the present invention. Anyone who is familiar with this art without departing from the spirit and scope of the present invention still makes various changes and modifications to the above-mentioned embodiments. The technical scope of the invention is protected, so the scope of protection of the present invention shall be subject to the scope defined in the appended patent application.

﹝this invention﹞ 1‧‧‧ Database 2‧‧‧Processing module 21‧‧‧Identification unit 22‧‧‧Modification unit G‧‧‧ Circuit diagram W‧‧‧pattern width L‧‧‧pointed length S‧‧‧pointed intercept R‧‧‧Angle radius ﹝Practice﹞ T‧‧‧line end N‧‧‧Flaw

[Figure 1] A conventional circuit pattern of a printed circuit board. [Figure 2] A partially enlarged view of the defective etching product shown in Figure 1. [Figure 3] A system block diagram of a preferred embodiment of the present invention. [Figure 4] A circuit modification pattern according to a preferred embodiment of the present invention. [Figure 5] A partially enlarged view after etching as shown in Figure 4.

1‧‧‧ Database

2‧‧‧Processing module

21‧‧‧Identification unit

22‧‧‧Modification unit

G‧‧‧ Circuit diagram

Claims (9)

A printed circuit board wiring system, comprising: a database for storing several circuit diagrams and several specification conditions of each circuit diagram, the several specification conditions including a first reference value, a second reference value, A first change amount and a second change amount; and a processing module for measuring and adjusting the wiring pattern of a printed circuit board circuit diagram, the processing module is coupled to the database, and compared by the processing module The circuit diagram of the printed circuit board, and various circuit diagrams and specifications in the database, when the pattern width at one end of the circuit diagram of the printed circuit board is less than the first reference value, the The processing module adjusts the end according to the first change amount, and when the pattern width at one end of the circuit diagram is between the first reference value and the second reference value, the processing module adjusts the end Forming a round head shape, the radius at the end is half of the width of the pattern, and when the width of the pattern at one end of the circuit diagram is greater than the second reference value, the processing module is based on the second change amount Adjust the end. A printed circuit board wiring system includes: a database for storing several circuit diagrams and several specification conditions of each circuit diagram, the several specification conditions including a first reference value, a first change amount and A second amount of change; and a processing module for measuring and adjusting the wiring pattern of a printed circuit board circuit diagram, the processing module is coupled to the database, and the processing module compares the printed circuit board circuit Diagram, and several circuit diagrams and specifications in the database, when the pattern width at one end of the circuit diagram of the printed circuit board is less than the first reference value, the processing module A change amount adjusts the end. When the pattern width at one end of the circuit diagram is greater than or equal to the first reference value, the processing module adjusts the end position according to the second change amount. The printed circuit board wiring system as described in item 1 or 2 of the patent application range, wherein the processing module has an identification unit and a modification unit, the identification unit measures the wiring pattern of the circuit diagram of the printed circuit board, the modification The unit adjusts the wiring pattern of this wiring diagram. The printed circuit board wiring system as described in item 1 or 2 of the patent application scope, wherein the first reference value is 7 to 27 μm. The printed circuit board wiring system as described in item 1 of the patent application scope, wherein the second reference value is 28 to 35 μm. The printed circuit board wiring system as described in item 1 or 2 of the patent application scope, wherein the first change amount is a tip length, the tip length is extended at the end, and a tip shape is formed at the end, the tip The head length is 13μm~20μm. The printed circuit board wiring system as described in item 6 of the patent application scope, wherein when the surrounding space at the end is insufficient to extend the length of the prong, the prong at the end is truncated by a prong intercept, so that A flat head shape is formed at the end. The printed circuit board wiring system as described in item 7 of the patent application scope, wherein the tip intercept is 6-8 μm. The printed circuit board wiring system as described in item 1 or 2 of the patent application range, wherein the second change amount is an arc radius, and the corner position at the end forms a rounded corner with the arc radius, the arc The corner radius is 5μm~20μm.

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