TWI776095B - printed circuit board - Google Patents

Abstract

The occupied area 2 includes a pair of printing bodies 2 a and 2 b which have both ends E1 and E2 and face each other with a space therebetween. The two ends of the printed body are electrically conductive as a whole, and the printed body is exposed from the printed substrate. The interval between the printed bodies is widened at at least one location between both ends.

Description

printed circuit board

Embodiments of the present invention relate to a printed circuit board.

On the printed circuit board, for example, an occupied area (connection terminals, pads, and pads) for mounting electronic components such as IC (Integrated Circuit) chips and capacitors is provided. The occupied area consists of a preset pattern (shape, figure, pattern) according to the type or size (size) of the mounted parts, etc. In this case, it is known that electronic components of two sizes (sizes) can be selectively mounted as a pattern occupying an area. [Prior Art Literature] [Patent Literature]

[Patent Document 1] Japanese Patent Laid-Open No. 9-83116

[Problems to be Solved by Invention]

However, in recent years, in order to effectively utilize the existing mounting components, it is required that two or more electronic components of various sizes (sizes) can be mounted on a printed circuit board (occupied area). However, in the above-mentioned conventional printed circuit board (occupied area), the degree of freedom in selecting electronic components that can be mounted is limited, and this requirement cannot be met.

In this case, by using, for example, a jumper wiring, a board, or the like, electronic components having different dimensions (sizes) can be mounted on a printed board (occupied area). However, in this way, in addition to the mounting step of the electronic components, a jumper wiring or an additional step of the substrate is also required. As a result, the manufacturing steps of the printed circuit board are increased and complicated, and the manufacturing cost is increased.

An object of the present invention is to provide a low-cost printed circuit board having a high degree of freedom of selection of mountable electronic components and an occupied area. [Technical means to solve problems]

According to an embodiment, the occupied area is provided with a pair of printing bodies which have both ends and face each other with a gap therebetween. Both ends of the pair of printed bodies are electrically conductive as a whole, and the pair of printed bodies are exposed from the printed substrate. The space between a pair of printing bodies is widened at at least one location between both ends.

"Constitution of an Embodiment" FIG. 1 is a configuration diagram of a printed circuit board 1 according to the present embodiment. As shown in FIG. 1 , on the surface of the printed circuit board 1 , occupied areas 2 and 3 and a solder resist 4 are provided. In addition, the details of the patterns (shapes, figures, patterns) occupying the areas 2 and 3 will be described later (see FIGS. 4 and 5 ).

The occupied areas 2 and 3 are constituted by conductors such as copper foil, and are constituted so that electronic parts of various sizes (sizes) can be mounted. The solder resist 4 covers the surface of the printed circuit board 1 other than the occupied areas 2 and 3 . Thereby, the circuit pattern (not shown) provided on the surface of the printed circuit board 1 is protected by the solder resist 4, and only the occupied areas 2 and 3 are exposed to the outside. In the example of FIG. 1 , electronic components such as the connector 5 , the resistor 6 , and the capacitor 7 are mounted on the occupied areas 2 and 3 .

FIG. 2 and FIG. 3 are schematic views of the mounting method of the electronic components 5 , 6 , and 7 . As shown in FIG. 2, on the occupied areas 2, 3 (one pair of printed bodies 2a, 3a, 2b, 3b described later), according to a preset mounting plan, the mounting solder 8 is applied at intervals. The solder 8 has a paste form and is applied to the occupied areas 2 and 3 before mounting the electronic components 5 , 6 and 7 . In addition, since the conventional method can be applied to a coating method, the description is abbreviate|omitted.

As shown in FIG. 3 , in a state where the electronic components 5 , 6 , and 7 are placed on the solder 8 , the solder 8 is melted and solidified under predetermined temperature control. Thereby, the electrodes Te of the electronic components 5 , 6 , and 7 are welded to the occupied areas 2 and 3 . Further, the electronic components 5 , 6 , and 7 are mounted on the printed circuit board 1 via the occupied areas 2 and 3 .

FIG. 4 is an outline configuration diagram of the occupied area 2 of the first pattern (shape, figure, pattern). As shown in FIG. 4, in the 1st pattern, the occupied area 2 has a pair of printing bodies (1st printing body 2a, 2nd printing body 2b). The printing bodies 2a and 2b are arranged to face each other with a gap therebetween.

The printed bodies 2a and 2b have a curved shape having both ends (one end E1 and the other end E2). Both ends E1 and E2 of the printed bodies 2 a and 2 b are electrically conductive as a whole (all of them), and the printed bodies 2 a and 2 b are exposed to the outside from the surface of the printed circuit board 1 . In the example of FIG. 4, the printing bodies 2a, 2b as a whole (all) have mutually the same outline, that is, a circular arc shape.

Here, the distance between the printed bodies 2a and 2b is the widest at at least one location between the two ends E1 and E2. In the example of FIG. 4 , the interval is the narrowest at the two ends E1 and E2 , and widens as the distance from the two ends E1 and E2 is increased. In other words, the interval is the widest at a position equidistant from both ends E1, E2 (ie, the central portion of the printing bodies 2a, 2b).

Furthermore, the printing bodies 2a and 2b have a line-symmetric relationship with respect to two mutually orthogonal straight lines L1 and L2, and have a point-symmetric relationship with respect to the intersection point Ps of the two straight lines L1 and L2. The straight line L1 extends from the center between the two ends E1 of the printing bodies 2a, 2b through the center between the two ends E2. The straight line L2 extends through a position equidistant from both ends E1 and E2 (the central portion of the printing bodies 2a and 2b). In addition, the intersection point Ps is defined as the center of gravity of the printed bodies 2a and 2b (that is, the occupied area 2).

FIG. 5 is an outline configuration diagram of the occupied area 3 of the second pattern (shape, figure, pattern). As shown in FIG. 5, in the 2nd pattern, the occupied area 3 has a pair of printing bodies (1st printing body 3a, 2nd printing body 3b). The printing bodies 3a and 3b are arranged to face each other with a gap therebetween.

The printed bodies 3a and 3b have a linear shape having both ends (one end E1 and the other end E2). Both ends E1 and E2 of the printed bodies 3 a and 3 b are electrically conductive as a whole (all of them), and the printed bodies 3 a and 3 b are exposed to the outside from the surface of the printed circuit board 1 . In the example of FIG. 5, the printing bodies 3a, 3b have the same outlines as a whole (all), that is, a long rectangular shape.

Here, the distance between the printed bodies 3a and 3b is the widest at at least one location between the two ends E1 and E2. In the example of FIG. 5 , the interval is the narrowest at one end E1 , widens gradually from one end E1 to the other end E2 , and is the widest at the other end E2 . In this case, the interval expands gradually from one end E1 to the other end E2. In other words, the interval narrows in a tapered shape from the other end E2 to the front end of the one end E1.

Furthermore, the printed bodies 3a and 3b have a line-symmetric relationship with respect to one straight line L1. Here, the straight line L1 extends from the center between the two ends E1 of the print bodies 3a and 3b through the center between the two ends E2.

FIG. 6 is a schematic diagram showing a patterning method of occupying areas 2 and 3. FIG. In FIG. 6, as an example, the formation method of the occupation area 2 (printing main body 2a, 2b) of a 1st pattern is shown. In this case, the following two patterning methods are assumed. One patterning method is not particularly shown, but is consistent with the outline of the occupation area 2 (printed bodies 2a, 2b), for example, a conductor such as copper foil is provided on the surface of the printed circuit board 1 . Another pattern forming method is a method using the solder mask openings 4a and 4b described later, and the other pattern forming method is shown in FIG. 6 .

As shown in FIG. 6 , first, a pair of copper foil patterns 9 a and 9 b are provided on the surface of the printed circuit board 1 . The copper foil patterns 9a and 9b are formed so that the surface of the printed circuit board 1 may be covered with copper foil in a wide range. Next, the solder resist 4 is provided so as to cover the pair of copper foil patterns 9a and 9b.

In the solder resist 4, a pair of solder resist openings (a first solder resist opening 4a and a second solder resist opening 4b) are formed in advance. The first solder resist opening 4a is formed through the solder resist 4, and has a shape that conforms to the outline of the first printed body 2a. The second solder resist opening 4b is formed through the solder resist 4, and has a shape that conforms to the outline of the second printed body 2b.

Thereby, the occupation area 2 of the first pattern (printed bodies 2a, 2b) is formed on the surface of the printed circuit board 1 through the pair of solder resist openings (the first solder resist opening 4a, the second solder resist opening 4b).

FIG. 7 is a schematic view of the installation state of the first pattern. In FIG. 7, as an example, four electronic components 10, 11, 12, 13 different in size (size) are mounted on the occupied area 2 (printed body 2a, 2b). In this case, the small-sized electronic components 10 and 11 are mounted on both end sides one by one. The middle-sized electronic components 12 are mounted on one side. The large-sized electronic parts 13 are rotated (tilted) mounted.

FIG. 8 is a schematic view of the installation state of the second pattern. In FIG. 8, as an example, two electronic components 14 and 15 different in size (size) are mounted on the occupied area 3 (printed bodies 3a, 3b). In this case, the electronic components 14 of the short strip size are mounted on the parts of the printed bodies 3a, 3b which are spaced narrowly from each other. The electronic components 15 of the strip size are mounted on the widely spaced parts of the printed bodies 3a and 3b.

"Effects of an Embodiment" As described above, according to the present embodiment, the occupying areas 2 and 3 (a pair of printed bodies 2a, 3a, 2b, and 3b) have conductivity as a whole and are exposed from the surface of the printed circuit board 1 . Thereby, electronic components of any size can be mounted on any part (position) of the whole occupying areas 2 and 3 . As a result, the degree of freedom of selection of mountable electronic components can be improved.

According to the present embodiment, the interval between the printed bodies 2a, 3a, 2b, and 3b is widened at at least one location between both ends E1 and E2. Thereby, various sizes (sizes) of electronic components can be mounted. In this case, for example, jumper wires or substrates are not required. As a result, the printing cost of the printed circuit board 1 can be reduced.

According to this embodiment, it is possible to freely select and mount various electronic components with different component specifications and manufacturers. Thereby, it becomes easy to become a supplier of many installation parts. As a result, the existing mounting parts can be effectively utilized.

"Variation" The present invention is not limited to the above-described embodiments, and the following modifications are also included in the technical scope of the present invention.

FIG. 9 is an outline configuration diagram of the occupied area 16 of the third pattern (shape, figure, pattern). As shown in FIG. 9, in the 3rd pattern, the occupied area 16 has a pair of printing bodies (1st printing body 16a, 2nd printing body 16b). The printing bodies 16a and 16b are arranged to face each other with a gap therebetween.

The printed bodies 16a and 16b have a curved shape having both ends (one end E1 and the other end E2). Both ends E1 and E2 of the printed bodies 16 a and 16 b are electrically conductive as a whole (all of them), and the printed bodies 16 a and 16 b are exposed to the outside from the surface of the printed circuit board 1 . In the example of FIG. 9, the printing bodies 16a, 16b have the same outline as the whole (all), that is, the shape of an arc.

Here, the distance between the printed bodies 16a and 16b is the widest at at least one location between the two ends E1 and E2. In the example of FIG. 9 , the interval is widest at the two ends E1 and E2 , and becomes narrower as the distance from the two ends E1 and E2 is increased. In other words, at a position equidistant from both ends E1 and E2 (ie, the central portion of the printing bodies 16a and 16b), the distance between the printing bodies 16a and 16b is the narrowest.

Furthermore, the printed bodies 16a and 16b have a line-symmetric relationship with respect to the two straight lines L1 and L2 orthogonal to each other, and have a point-symmetric relationship with respect to the intersection point Ps of the two straight lines L1 and L2. The straight line L1 extends from the center between the two ends E1 of the printing bodies 16a, 16b through the center between the two ends E2. The straight line L2 extends through a portion (central portion of the printing bodies 16a, 16b) equidistant from both ends E1, E2. In addition, the intersection point Ps is defined as the center of gravity of the printing bodies 16a and 16b (that is, the occupied area 16).

FIG. 10 is an outline configuration diagram of the occupied area 17 of the fourth pattern (shape, figure, pattern). As shown in FIG. 10, it has a pair of printing bodies (1st printing body 17a, 2nd printing body 17b). The printing bodies 17a and 17b are arranged to face each other with a gap therebetween.

The first printed body 17a has a curvilinear shape having both ends (one end E1, the other end E2), and the second printed body 17b has a linear shape having both ends (one end E1, the other end E2). Both ends E1 and E2 of the printed bodies 17a and 17b are electrically conductive as a whole, and the printed bodies 17a and 17b are exposed to the outside from the surface of the printed circuit board 1 . In the example of FIG. 10, the whole (entirely) of the first printing body 17a has a circular arc shape. On the other hand, the second printing body 17b has an elongated rectangular shape as a whole (entirely).

Here, the distance between the printing bodies 17a and 17b is the widest at at least one location between the two ends E1 and E2. In the example of FIG. 10, the 2nd printing body 17b is linearly inclined so that it may separate from the 1st printing body 17a from one end E1 to the other end E2. Therefore, the distance between the printing bodies 17a, 17b is the narrowest at one end E1, and the distance between the other end E2 is wider than that between the one end E1. In this case, the interval becomes wider away from both ends E1, E2. In other words, the interval is the widest at the position close to the other end E2 with respect to the position equidistant from the two ends E1 and E2 (ie, the central part of the printing bodies 17a and 17b).

Furthermore, the printing bodies 17a and 17b are neither line-symmetric nor point-symmetric, but have an asymmetric positional relationship. In this case, the positional relationship between the printing bodies 17a and 17b can be randomly set. For example, instead of the positional relationship shown in FIG. 10, the first printing body 17a may be turned upside down, or the inclination orientation of the second printing body 17b may be reversed.

As described above, according to the modification of FIGS. 9 and 10 , the occupied areas 16 and 17 can be set in any pattern according to the use purpose and use environment of the printed circuit board 1 . As a result, the freedom of setting the occupied areas 16 and 17 can be dramatically improved. As a result, the degree of freedom of selection of mounting parts can be greatly improved. In addition, since other functions and effects are the same as those of the above-described embodiment, the description thereof will be omitted.

This application is based on Japanese Patent Application No. 2018-237603 (filing date: December 19, 2018), and enjoys priority according to this application. This application incorporates all the contents of the basic applications by reference to those basic applications.

1: Printed substrate 2: Occupied area 2a: printed body 2b: printed body 3: Occupied area 3a: printed body 3b: printed body 4: Solder resist 4a: 1st solder mask opening 4b: 2nd solder mask opening 5: Connector 6: Resistor 7: Capacitor 8: Solder for mounting 9a: Copper foil pattern 9b: Copper foil pattern 10: Electronic Parts 11: Electronic Parts 12: Electronic Parts 13: Electronic Parts 14: Electronic Parts 15: Electronic Parts 16: Occupied area 16a: 1st printed body 16b: Second printed body 17: Occupied area 17a: 1st printed body 17b: Second printed body E1: one end E2: the other end L1: Straight line L2: Straight line Ps: intersection Te: electrode

FIG. 1 is an enlarged perspective view of a part of a printed circuit board according to one embodiment. FIG. 2 is a perspective view of the mounting solder applied to the occupied area. FIG. 3 is a cross-sectional view showing a mounted state of electronic components. FIG. 4 is a plan view of the occupied area of the first pattern. FIG. 5 is a plan view of the occupied area of the second pattern. FIG. 6 is a plan view showing a patterning method using an occupied area of a solder resist. FIG. 7 is a plan view showing the mounting state of the electronic component to the first pattern. FIG. 8 is a plan view showing the mounting state of the electronic component to the second pattern. FIG. 9 is a plan view of the occupied area of the third pattern. FIG. 10 is a plan view of the occupied area of the fourth pattern.

2: Occupied area

2a: printed body

2b: printed body

E1: one end

E2: the other end

L1: Straight line

L2: Straight line

Ps: intersection

Claims (10)

A printed circuit board having an occupied area capable of mounting electronic components of various sizes, and the occupied area includes: a pair of printed bodies having two ends and spaced from each other and facing each other, the pair of printed bodies The two ends have electrical conductivity as a whole, and the pair of printed bodies is exposed from the printed circuit board, the interval between the pair of printed bodies is widened at at least one position between the two ends, and the pair of printed bodies is widened. At least one of them includes a curved portion in a part or the whole thereof. The printed circuit board according to claim 1, wherein the pair of printed bodies is composed of at least one pattern of point symmetry, line symmetry, and asymmetry. The printed circuit board of claim 1, wherein at least one of the pair of printed bodies includes a linear portion in a part or the whole thereof. The printed circuit board of claim 1, wherein the pair of printed bodies has a curved shape having both ends, and the interval between the pair of printed bodies is narrowest at the two ends, and widens as the distance from the two ends increases. The printed circuit board of claim 1, wherein the pair of printed bodies is in a straight line shape having the two ends, and the interval between the pair of printed bodies is the narrowest at one end and the widest at the other end. The printed circuit board of claim 1, wherein the pair of printed bodies has a curved shape having both ends, and the distance between the pair of printed bodies is widest at the two ends, and narrows as the distance from the two ends. The printed circuit board of claim 1, wherein one of the pair of printed bodies has a curved shape having both ends, the other of the pair of printed bodies has a straight line having both ends, and the other The printing body is linearly inclined in a manner of being separated from the above-mentioned one printing body from one end to the other end. The printed circuit board according to claim 4 or 6, wherein the pair of printed bodies has a line-symmetric relationship with respect to two straight lines orthogonal to each other, and has a point-symmetric relationship with respect to the intersection of the two straight lines, and one of the straight lines passes through The two ends of the pair of printing bodies extend from the center of each other, and the other straight line extends through a position equidistant from the two ends. The printed circuit board of claim 5, wherein the pair of printed bodies has a line-symmetric relationship with respect to a straight line, The straight line extends through the center between the two ends of the pair of printing bodies. The printed circuit board of claim 7, wherein the distance between the pair of printing bodies is narrowest at one end, and wider than the distance between the one end at the other end, so that the pair of printing bodies have an asymmetrical positional relationship.

Images