TWM451781U - Circuit board expansion proportional screening device and screening device set - Google Patents

Description

Circuit board expansion and contraction ratio screening device and screening device group

The present invention relates to a drilling process for a flexible printed circuit board, and more particularly to a screening device for screening flexible printed circuit boards of different shrinkage ratios before secondary drilling.

The flexible printed circuit board having a multi-layer structure comprises a multi-layer substrate, a copper foil layer is disposed between the substrates, and a plurality of via structures are arranged on the circuit board by drilling, so that the circuits located in different copper foil layers can be electrically connected to each other. connection.

During the processing of flexible printed circuit boards, the boards need to be baked, resulting in varying degrees of shrinkage of the boards. When drilling a flexible printed circuit board with a power tool, because the predetermined drilling position on the machine tool is fixed, the drilling position will be caused without adjusting the drilling position in response to the different expansion and contraction of each circuit board. The position of the hole is deviated and the circuits cannot be connected correctly. Therefore, the inconsistent degree of shrinkage of the existing flexible printed circuit board has become the most common abnormal situation in subsequent drilling operations, which not only causes the yield of the product to decrease but also increases. The time and cost of handling many obstacles.

In view of the problem that the flexible printed circuit board of the prior art has a difference in the ratio of expansion and contraction, the present design has a circuit board expansion and contraction screening device and a device group thereof, which can achieve the purpose of screening the circuit board according to different expansion ratios. .

In order to achieve the above-mentioned creative purpose, the circuit board of this creation is scaled up and down. The device includes a positioning substrate, and a positioning post is respectively disposed at four corners of the positioning substrate.

The circuit board expansion/contraction ratio screening device, wherein the positioning substrate is a rectangular plate body.

The circuit board expansion and contraction ratio screening device, wherein the four positioning columns are a first positioning column, a second positioning column, a third positioning column and a fourth positioning column, the third positioning column and the fourth positioning column The imaginary connection of the positioning post is parallel to the imaginary connection of the first positioning post and the second positioning post, and the spacing between the third positioning post and the fourth positioning post is greater than the spacing between the first positioning post and the second positioning post.

The circuit board expansion/contraction ratio screening device, wherein the first positioning column, the second positioning column, the third positioning column and the fourth positioning column respectively form an imaginary connection with the adjacent positioning column, and the imaginary connection Connected separately to form a trapezoid.

A circuit board expansion/contraction ratio screening device group includes the above-mentioned circuit board expansion and contraction ratio screening device, wherein each circuit board expansion and contraction screening device has a plurality of different shrinkage or increase ratios of position and spacing of each positioning column .

Through the application of the above technical means, the actual use of the present invention is applied to the soft printed circuit board after the baking process and before the drilling process, the flexible printed circuit board is provided with a positioning hole during the drilling process, and will be baked. Each positioning hole of the soft printed circuit board after baking processing is respectively set on the positioning column of the screening device of various shrinking or increasing proportion specifications, and if the screening device of a certain specification can be smoothly inserted, the information can be known. The board expansion ratio of the flexible printed circuit board corresponds to the screening device of the specific specification, through the above The plurality of flexible printed circuit boards can be classified according to the increase and contraction ratios respectively, and the secondary drilling to the wrong position can be effectively avoided by adjusting the predetermined drilling position of the drilling machine in advance with the expansion and contraction ratio. The flexible printed circuit board with the same expansion ratio can be processed at the corresponding drilling position, which not only provides the correct drilling position to improve the processing yield, but also can reduce the abnormal state during the drilling process. Time and cost.

Since the imaginary lines between the positioning holes are trapezoidal and have different distances, the imaginary lines of the positioning columns are also trapezoidal and have different pitches. When the orientation of the flexible printed circuit board is wrong, it is not smooth. Nesting a flexible printed circuit board to provide a foolproof device that avoids operation in the wrong direction

The present invention is a circuit board expansion and flatness screening device, which is applied to a flexible printed circuit board. Referring to FIG. 1 and FIG. 2, the flexible printed circuit board 10 has a flexible and rectangular plate body. Before the baking process, a positioning hole is formed in each of the four corners of the flexible printed circuit board 10, and the four positioning holes are respectively a first positioning hole 11, a second positioning hole 12, and a third positioning. The imaginary connection between the hole 13 and the fourth locating hole 14 at the center of the hole of the first locating hole 11 and the second locating hole 12 forms a first imaginary connection 110, and the second locating hole 12 and the third locating hole 13 The imaginary connection of the center of the hole forms a second imaginary connection 120, and the imaginary connection of the center of the hole of the third positioning hole 13 and the fourth positioning hole 14 forms a third imaginary connection 130, the fourth positioning hole 14 and the first The imaginary connection of the center of the hole of the locating hole 11 forms a fourth imaginary connection 140. In the preferred embodiment of the present creation, the first imaginary connection 110, The second imaginary connection 120, the third imaginary connection 130, and the fourth imaginary connection 140 are formed as a trapezoid, and the length of the first imaginary connection 110 is smaller than the length of the third imaginary connection 130, and the first imaginary connection 110 is parallel to the third imaginary connection 130.

Referring to FIG. 1 and FIG. 3 , the circuit board expansion and contraction screening device of the present invention comprises a positioning substrate 20 and four positioning posts 30 .

The positioning substrate 20 is a rectangular plate body, and the four positioning posts 30 are respectively disposed at four corners on the top surface of the positioning substrate 20. The four positioning posts 30 are sequentially a first positioning post 31 and a second positioning post. 32. A third positioning post 33 and a fourth positioning post 34, the imaginary connection between the first positioning post 31 and the second positioning post 32 forms a fifth imaginary connection 310, the second positioning post 32 and the The imaginary connection between the three positioning posts 33 forms a sixth imaginary connection 320, and the imaginary connection between the third positioning post 33 and the fourth positioning post 34 forms a seventh imaginary connection 330, the fourth positioning post 34 And the imaginary connection between the first positioning post 31 forms an eighth imaginary connection 340. In the preferred embodiment of the present creation, the fifth imaginary connection 310, the sixth imaginary connection 320, and the seventh imaginary connection The 330 and the eighth imaginary connection 340 are formed in a trapezoidal shape, the length of the fifth imaginary connection 310 is smaller than the length of the seventh imaginary connection 330, and the fifth imaginary connection 310 is parallel to the seventh imaginary connection 330.

Since the flexible printed circuit board 10 has a different degree of expansion and contraction during the baking process, for example, the area before baking is a, the area after baking is 5% contracted, and the area is made. Changed to 0.95a, the position and spacing of the positioning holes set on the surface also change in equal proportions.

In accordance with the above-mentioned expansion and contraction situation, the present invention is provided with a circuit board scaling degree screening device group, which includes multiple sets of different screenings. The device, each of the screening devices has the same structure as described above, and includes a positioning substrate 20 and four positioning posts 30. However, the position and spacing of the positioning posts 30 of each screening device are also provided in a plurality of different ratios. For example, a screening device is provided, and the positions and spacings of the positioning posts 30 correspond to the positioning holes of the flexible printed circuit board 10 before processing. Position and spacing; a screening device is further provided, wherein the positions and spacings of the positioning posts 30 correspond to the positions and spacings of the positioning holes of the flexible circuit board 10 which shrinks by 5% after processing, and a plurality of sets of processing are arranged in this manner. Screening devices with different shrinkage or increase ratios, for example, having corresponding soft printed circuit boards shrinking by 0%, 0.5%, 1%, 3%, 5%, and increasing by 0.5%, 1%, 3%, 5%, etc. Contraction or increase in proportion.

When the present invention is actually used, please refer to FIG. 1 and FIG. 4, which are applied to the positioning holes of the flexible printed circuit board 10 after the baking process of the flexible printed circuit board 10 and before the drilling process. On the positioning post 30 of the screening device of the corresponding specification, if the screening device of a certain specification can be smoothly inserted, it can be known that the plate body shrinkage ratio of the flexible printed circuit board 10 corresponds to the screening device of the specific specification. In the above manner, the plurality of flexible printed circuit boards 10 can be classified according to the expansion ratio, and the predetermined drilling position of the drilling machine can be adjusted in advance according to the expansion and contraction ratio, thereby effectively avoiding the drilling to the wrong position. The flexible printed circuit board 10 having the same expansion ratio can be processed at the corresponding drilling position, which not only provides the correct drilling position to improve the processing yield, but also can reduce the abnormal state during the drilling process. Time and cost. Since the imaginary lines between the positioning holes are trapezoidal and have different distances, the imaginary lines of the positioning posts 30 are also trapezoidal and have different pitches. When the orientation of the flexible printed circuit board 10 is wrong, Unable to smoothly put the flexible printed circuit board 10 Nesting, thereby providing a foolproof device that avoids the operation in the wrong direction.

The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention in any way. Although the present invention has been disclosed above in the preferred embodiments, it is not intended to limit the present invention, and any technology that is familiar with the present technology. A person skilled in the art can make some modifications or modifications to the equivalent embodiments by using the technical content disclosed above without departing from the spirit and scope of the present invention. Technical simplifications Any simple modifications, equivalent changes and modifications made to the above embodiments are still within the scope of the present invention.

10‧‧‧Soft printed circuit board

11‧‧‧First positioning hole

12‧‧‧Second positioning hole

13‧‧‧ third positioning hole

14‧‧‧Four locating holes

110‧‧‧First imaginary connection

120‧‧‧Second hypothetical connection

130‧‧‧ Third imaginary connection

140‧‧‧Fourth hypothetical connection

20‧‧‧ Positioning substrate

30‧‧‧Positioning column

31‧‧‧First positioning column

32‧‧‧Second positioning column

33‧‧‧ third positioning column

34‧‧‧four positioning column

310‧‧‧ Fifth imaginary connection

320‧‧‧ Sixth imaginary connection

330‧‧‧ seventh imaginary connection

340‧‧‧ Eightth imaginary connection

FIG. 1 is a schematic perspective view of a circuit board and a screening device of the present invention.

Figure 2 is a plan view of the circuit board of the present invention.

Fig. 3 is a top plan view of the screening device of the present invention.

Figure 4 is a plan view of the circuit board and the screening device of the present invention.

10‧‧‧Soft printed circuit board

11‧‧‧First positioning hole

12‧‧‧Second positioning hole

13‧‧‧ third positioning hole

14‧‧‧Four locating holes

20‧‧‧ Positioning substrate

30‧‧‧Positioning column

31‧‧‧First positioning column

32‧‧‧Second positioning column

33‧‧‧ third positioning column

34‧‧‧four positioning column

Claims (5)

A circuit board expansion/contraction ratio screening device includes a positioning substrate, and a positioning post is respectively disposed at four corners of the positioning substrate. The circuit board expansion/contraction screening device according to claim 1, wherein the positioning substrate is a rectangular plate body. The circuit board expansion/contraction ratio screening device according to claim 1 or 2, wherein the four positioning columns are a first positioning column, a second positioning column, a third positioning column and a fourth positioning column, respectively. The imaginary connection of the three positioning column and the fourth positioning column is parallel to the imaginary connection of the first positioning column and the second positioning column, and the spacing between the third positioning column and the fourth positioning column is greater than the first positioning column and the second Position the spacing between the columns. The circuit board expansion/contraction ratio screening device of claim 3, wherein the first positioning post, the second positioning post, the third positioning post, and the fourth positioning post respectively form an imaginary connection with the adjacent positioning post, The imaginary wires are connected to form a trapezoid. A circuit board expansion/contraction screening device group, comprising the circuit board expansion/contraction ratio screening device according to any one of claims 1 to 4, wherein each of the circuit board expansion and contraction ratio screening devices has a position of each positioning column and There are many different shrinkage or increase ratios for the spacing settings.