TWI477215B - Net detecting method - Google Patents

Description

Stitch inspection method

A stitch inspection method, particularly relating to a stitch inspection method suitable for a printed circuit board.

In general, after the layout of the Printed Circuit Board (PCB) is completed, it is necessary to further check the lines on the layout to confirm whether the lines meet the specifications required for the layout. In the past, when checking the lines on the floor plan, it was necessary to do it manually, which would cost more manpower and time.

In view of this, many manufacturers have proposed a software inspection function for printed circuit board layout design to improve the above-mentioned manual detection problem. However, most of the above inspection functions are directed to checking printed circuit boards for problems and signal design errors. However, for the current thinner circuit layout, the calculation of the line length of some lines is very troublesome, or it is necessary to manually add a short period of a small sum, and it takes a long time to manually add the total calculation one by one. Therefore, for R&D personnel with limited research and development time, this work has a relatively high cost. Therefore, the line inspection of the printed circuit board layout still has improved air.

The present invention is directed to a stitch inspection method for improving the speed and accuracy of stitch inspection.

The present invention provides a stitch inspection method suitable for a printed circuit board having a plurality of stitches coupled to an electronic component. This stitch check method includes the following steps. A stitch to be confirmed is obtained, wherein the stitch to be confirmed is one of the stitches. Pointing the electronic components together, along the stitch to be confirmed to the preset length, to obtain the end point, wherein the preset length package Includes gauge length and extension length. From the end point, the electronic component is checked for the stitch to be confirmed, and it is judged whether or not the width of the stitch to be confirmed becomes small. If it is judged that the width of the stitch to be confirmed becomes small, a checkpoint is generated, and the checkpoint corresponds to a position where the width of the stitch to be confirmed becomes smaller. Calculate the length between the checkpoint and the starting point to get the length of the exam. Determine if the inspection length is greater than the specification length. If it is judged that the inspection length is greater than the specification length, the stitch to be confirmed is indicated. Record the stitch to be confirmed.

In an embodiment, the aforementioned stitch inspection method further includes the following steps. If it is judged that the inspection length is not greater than the specification length, the stitch to be confirmed is qualified, and the stitch to be confirmed is recorded.

In an embodiment, the aforementioned stitch inspection method further includes the following steps. Determine if there is extra space around the stitch to be confirmed. If it is judged that there is no extra space around the to-be-recognized stitch, the width of the stitch to be confirmed is not adjusted. If it is judged that there is excess space around the to-be-confirmed stitch, adjust the width of the stitch to be confirmed.

In an embodiment, the foregoing takes the electronic component as a starting point and follows the stitch to be confirmed to a preset length to obtain an end point, wherein the step of including the normal length and the extended length of the preset length includes the following steps. Starting with the electronic component, follow the stitch to be confirmed to the preset length. It is determined whether the line length of the stitch to be confirmed is greater than a preset length. If it is determined that the line length of the stitch to be confirmed is greater than the preset length, the extension length is adjusted, and the electronic component is returned to the starting point, along the step of confirming the stitch to the preset length. If it is determined that the line length of the stitch to be confirmed is not greater than the preset length, the end point is obtained.

In an embodiment, the step of obtaining the stitch to be confirmed includes the following steps. Receive keywords. According to the keyword, find a stitch related to the keyword to generate a stitch group to be confirmed. The stitch to be confirmed is obtained from the stitch group to be confirmed.

In an embodiment, the foregoing step further includes the following steps after the step of recording the stitch to be confirmed. Determine whether all the stitches in the stitch group to be confirmed have been checked. If it is determined that all the stitches in the to-be-recognized stitch group have not been checked, the step of obtaining the stitch to be confirmed is returned.

The stitch inspection method disclosed in the present invention takes the electronic component as a starting point, follows the stitch to be confirmed to a preset length to obtain an end point, and then checks the to-be-confirmed stitch from the end point to the electronic component to determine the line to be confirmed. Whether the trace produces an impedance change, and accordingly generates a checkpoint. Next, calculate the length between the checkpoint and the starting point to obtain the inspection length and determine whether the inspection length is large. According to the length of the specification, it is determined whether the stitch to be confirmed conforms to the specification. In this way, the speed and accuracy of the stitch inspection can be effectively improved.

The features and implementations of the present invention are described in detail below with reference to the drawings.

100‧‧‧Printed circuit board

110‧‧‧Electronic components

120, 130‧‧‧ stitches

121, 122‧‧ ‧ line segments

L1‧‧‧Preset length

L2‧‧‧Check length

Starting point of P1‧‧

P2‧‧‧ end point

P3‧‧‧ checkpoint

Figure 1 is a partial schematic view showing the layout of a printed circuit board of the present invention.

Fig. 2 is a schematic view showing the stitch inspection method of the present invention.

Fig. 3 is a detailed flowchart of step S202 of Fig. 2.

Fig. 4 is a detailed flowchart of step S204 of Fig. 2.

Fig. 5 is a flow chart subsequent to step S204 of Fig. 2 and Fig. 3.

Please refer to FIG. 1 for a partial schematic view of the layout of the printed circuit board of the present invention. The printed circuit board 100 of the present embodiment includes electronic components 110 and traces (Net) 120, 130. The stitches 120, 130 are coupled to the electronic component 110. Also, the stitch 120 includes line segments 121 and 122, wherein the width of the line segment 121 is smaller than the width of the line segment 122. In addition, the line segments of the stitch 130 have the same width.

For convenience of description, in the "first drawing", only one electronic component 110 and two stitches 120 are drawn on the printed circuit board 100, but the present invention is not limited thereto, and the number of the electronic components 110 and the stitches 120 is limited. The number of the electronic components 110 may be two or more, and the number of the stitches may be three or more, and the number of the electronic components 110 and the stitches 120 may be the same. Or different. In addition, the traces of the stitches 120 and 130 of the "Fig. 1" are shown by straight lines, and are merely an embodiment of the present invention, and are not intended to limit the manner in which the stitches 120, 130 of the present invention are routed.

The components and their corresponding relationships included in the printed circuit board 100 are briefly described above, and will be further described below in conjunction with the stitch inspection method.

Please refer to "Fig. 2", which is an illustration of the stitch inspection method of the present invention. intention. In step S202, a stitch to be confirmed is obtained, wherein the stitch to be confirmed is one of the stitches 120, 130. For example, the user inputs the stitch to be inspected by the device having the stitch check mode, so that the device obtains the corresponding stitch as the stitch to be confirmed to perform the subsequent stitch check process.

In step S204, the electronic component 110 is used as the starting point P1 along the to-be-confirmed stitch to the preset length L1 to obtain the end point P2, wherein the preset length L1 includes the gauge length and the extended length. In this embodiment, the length of the specification is the length of the stitches to which the electronic component 110 is connected in the specification, and the extension length can be adjusted by the user according to his needs. Also, it is assumed that the gauge length is, for example, 500, and the extension length is, for example, 200, so the preset length L1 is 700.

Therefore, after the stitch to be confirmed is obtained, the length of the trace to be confirmed is obtained from the starting point P1 and, for example, by using coordinates calculated by calculating the stitch to be confirmed, and the length of the obtained trace to be confirmed is performed. The accumulation is continued until the accumulated length reaches the preset length L1 to find the aforementioned end point P2.

After the end point P2 is obtained in step S206, the end point P2 is started, and the line to be confirmed is advanced in the direction of the electronic component 110, and the width of the stitch to be confirmed is read to determine whether the width of the stitch to be confirmed is Become smaller.

If it is judged that the width of the stitch to be confirmed becomes small, the process proceeds to step S208, and a check point P3 is generated, which corresponds to a position at which the width of the stitch to be confirmed becomes smaller. In step S210, the length between the check point P3 and the start point P1 is calculated to obtain the check length L2 as a judgment as to whether or not the stitch to be confirmed conforms to the specification.

In step S212, it is judged whether or not the inspection length L2 is larger than the specification length. Assuming that the inspection length is 520, it is judged that the inspection length L2 (520) is larger than the gauge length (500). That is, if it is judged that the inspection length L2 is larger than the specification length, the process proceeds to step S214, the stitch to be confirmed is marked, and the difference between the inspection length L2 and the gauge length is calculated. For example, marking the to-be-confirmed stitch can be marked, for example, in a high-light manner. Also, the aforementioned difference is, for example, the inspection length L2 minus the gauge length, that is, 520-500=20. In step S216, the stitch to be confirmed is recorded. In this way, the user can know that the stitch to be confirmed does not meet the specifications and needs to be The subsequent processing of the stitch to be confirmed is to be performed.

On the other hand, assuming that the inspection length is 480, it is judged that the inspection length L2 (480) is not larger than the gauge length (500). That is to say, if the above-mentioned step S212 is satisfied, it is determined that the to-be-recognized stitch is not greater than the specification length, then the process proceeds to step S218, the line to be confirmed is qualified, and the process proceeds to step S216 to record the to-be-confirmed stitch. In this way, the user can know that the to-be-confirmed stitch has been in compliance with the specification, and the flow of the stitch check can be performed on other stitches.

Further, in this embodiment, after step S218, steps S222, S224, and 226 may be further included. In step S222, it is determined whether there is excess space around the stitch to be confirmed. That is to say, when the above-mentioned to-be-confirmed stitches do not conform to the specification, the coordinates can be used to calculate whether there is extra space between the to-be-confirmed stitch and the adjacent stitch. If it is determined that there is no excess space around the to-be-recognized stitch, the process proceeds to step S224, and the width of the stitch to be confirmed is not adjusted. If it is determined that there is excess space around the to-be-recognized stitch, the process proceeds to step S226, and the width of the to-be-confirmed stitch between the check point P3 and the starting point P1 is adjusted. For example, the width of the line segment 121 as shown in FIG. 1 can be adjusted. The width of the line segment 122 as shown in "Fig. 1".

In step S206, if it is determined that the width of the to-be-recognized stitch has not become small, the process proceeds to step S220, the line to be confirmed is qualified, and the process proceeds to step S216, and the stitch to be confirmed is recorded. That is to say, the stitch of the stitch to be confirmed conforms to the specification, and it is not necessary to adjust the stitch to be confirmed.

Please refer to "Figure 3", which is a detailed flowchart of step S202 of "Fig. 2". In step S302, a keyword is received, for example, by the user inputting a keyword corresponding to the stitch to be inspected by the device having the stitch check mode, in order to perform the search operation.

Next, in step S304, the stitches related to the keywords are searched according to the keywords to generate a to-be-confirmed stitch group. That is to say, the foregoing device finds all the stitches associated with the name of the stitch, for example, according to the aforementioned keywords, and establishes a group of stitches to be confirmed with these stitches. Thereafter, in step S306, the stitch to be confirmed is obtained from the stitch group to be confirmed. After the stitch to be confirmed is obtained, the related processes of steps S204 to 226 of "Fig. 2" can be continued, and therefore will not be described herein.

Please refer to FIG. 4, which is a detailed flowchart of step S204 of "FIG. 2". In step S402, the electronic component 110 is used as the starting point P1 along the stitch to be confirmed to the preset length L1. In step S404, it is determined whether the line length of the stitch to be confirmed is greater than the preset length L1.

Assuming that the line length of the stitch to be confirmed is smaller than the preset length L1, the process proceeds to step S406 to adjust the extension length. In the present embodiment, the manner of adjusting the extension length is, for example, subtracting the extension length by a length which can be set by the user according to his needs. Then, after the extension length is adjusted, the process returns to step S404 to continuously determine whether the to-be-recognized stitch is greater than the preset length L1 until the stitch to be confirmed is greater than or equal to the preset length L1, so as to perform a subsequent stitch inspection process.

Further, assuming that the line length of the stitch to be confirmed is larger than the preset length L1, the process proceeds to step S408, where the end point is obtained.

Please refer to the flowchart shown in step 5 after the step S204 of "Fig. 2" and "Fig. 3". In step S502, it is determined whether all the stitches in the stitch group to be confirmed have been checked. If it is determined that all the stitches in the to-be-recognized stitch group have not been checked, the process returns to step S306 (corresponding to step S202 of "FIG. 2") as shown in FIG. 3, and the stitch group to be confirmed is Re-obtain the stitch to be confirmed that needs to be checked again. On the other hand, if it is judged that all the stitches in the stitch group to be confirmed have been checked, the stitch check process is ended.

The stitch inspection method of the embodiment of the present invention takes the electronic component as a starting point, along the line to be confirmed to a preset length, to obtain an end point, and then checks the to-be-confirmed stitch from the end point to the electronic component. It is judged whether or not the width of the stitch to be confirmed becomes small, and a checkpoint is generated accordingly. Next, the length between the checkpoint and the starting point is calculated to obtain the inspection length, and it is determined whether the inspection length is greater than the specification length, and it is determined whether the to-be-confirmed stitch conforms to the specification. In this way, the speed and accuracy of the stitch inspection can be effectively improved.

While the present invention has been described above in the foregoing embodiments, it is not intended to limit the invention, and the invention may be modified and modified without departing from the spirit and scope of the invention. The scope of patent protection shall be subject to the definition of the scope of the patent application attached to this specification.

Claims (6)

A stitch inspection method is suitable for a printed circuit board having a plurality of stitches, the stitches being coupled to an electronic component, the stitch inspection method comprising: obtaining a to-be-confirmed stitch, wherein the Confirming that the stitch is one of the stitches; taking the electronic component as a point together, along the stitch to be confirmed to a predetermined length, to obtain an end point, wherein the preset length includes a gauge length and an extension Length; checking the to-be-confirmed stitch from the end point to determine whether the width of the to-be-recognized stitch becomes small; if it is determined that the width of the to-be-recognized stitch becomes small, a check point is generated, the check point a position corresponding to the width of the stitch to be confirmed; calculating a length between the check point and the start point to obtain an inspection length; determining whether the inspection length is greater than the specification length; and determining that the inspection length is greater than the specification length , indicating the stitch to be confirmed; and recording the stitch to be confirmed. The stitch inspection method of claim 1, further comprising: if it is determined that the inspection length is not greater than the specification length, the to-be-recognized stitch is qualified, and the to-be-confirmed stitch is recorded. The stitch inspection method of claim 2, further comprising: determining whether there is excess space around the to-be-recognized stitch; if it is determined that the unnecessary space is not around the to-be-recognized stitch, the line to be confirmed is not adjusted. The width of the trace; and if it is determined that there is excess space around the trace to be confirmed, the width of the trace to be confirmed is adjusted. The stitch inspection method of claim 1, wherein the electronic component is the starting point along the to-be-recognized stitch to the preset length to obtain the end point, wherein the preset length includes the specification length and the The steps of extending the length include: Taking the electronic component as the starting point, along the to-be-recognized stitch to the preset length; determining whether the line length of the to-be-recognized stitch is greater than the preset length; if determining that the line length of the to-be-recognized stitch is greater than the preset length, Adjusting the extension length, and returning to the electronic component as the starting point, along the step of confirming the stitch to the preset length; and if it is determined that the line length of the to-be-recognized stitch is not greater than the preset length, obtaining the End point. The stitch inspection method of claim 1, wherein the step of obtaining the to-be-recognized stitch comprises: receiving a keyword; searching for the stitches associated with the keyword according to the keyword to generate a to-be-confirmed a stitch group; the stitch to be confirmed is obtained from the stitch group to be confirmed. The stitch inspection method of claim 5, wherein after the step of recording the to-be-recognized stitch, the method further comprises: determining whether all of the stitches in the to-be-recognized stitch group have been checked; After confirming that all of the stitches in the stitch group have not been checked, the step of obtaining the stitch to be confirmed is returned.