JP2005309730A - Device, method, and program for designing substrate - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To improve arranging operation efficiency of resistors and the degree of freedom of design. <P>SOLUTION: A resistance length calculation part 5 calculates the length of a resistor having a width equal to or less than the width of a specified wire according to a resistance value specified from an input part 3. An arrangement decision part 7 compares the length of the specified wire with the length of the resistor having the specified resistance value to judge whether or not the resistor having the specified resistance value can be arranged on the specified wire. When the resistor with the specified resistance value can be arranged on the specified wire, a resistor generation part 8 generates a resistor which is to be arranged on the specified wire along its path and has a width equal to or less than the width of the specified wire. A presentation control part 9 displays a deficient wire length at a display part 4 when the resistor can not be arranged and displays the generated resistor at the display part when the resistor can be arranged. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a board design apparatus, a board design method, and a board design program.

  2. Description of the Related Art Conventionally, a manufacturing technique for forming a resistor on a surface layer (first layer) using a technique such as screen printing is known for a printed circuit board (see, for example, Patent Document 1).

  Also in a multilayer printed circuit board, a manufacturing technique is known in which components such as the resistor, capacitor, and coil are formed on the inner layer in order to increase component mounting density (see, for example, Patent Document 2 and Patent Document 3).

  In general, when a resistor is formed on the surface layer or the inner layer of a printed circuit board, a shape called a meander pattern is used. As an example of the meander shape, for example, a manufacturing technique using the meander shape when forming a resistor in a semiconductor integrated circuit is known (see, for example, Patent Document 4).

Conventionally, in designing a printed circuit board, when a resistor is formed on a surface layer or an inner layer, a meander-shaped resistor having a predetermined shape (occupied area) is uniformly selected according to a desired resistance value. Then, it is determined whether there is a space in which the resistor can be arranged on the substrate. If there is a space in which the resistor can be arranged, the resistor is arranged in the space.
JP 2002-280699 A JP-A-9-181451 JP 2004-31476 A JP-A-7-152805

  However, in the above-described conventional technology, a meander-shaped resistor that is uniquely determined is selected according to a desired resistance value. Therefore, when designing a resistor on a substrate, the designer forms the resistor (occupied). There is a problem that the shape of the region) cannot be changed, and the degree of freedom in design is significantly limited.

  The present invention has been made in consideration of such circumstances, and its object is to provide a board design apparatus, a board design method, and a board design program capable of improving the efficiency of placement of resistors and the degree of design freedom. Is to provide.

  The present invention has been made to solve the above problems, and is a substrate design apparatus for designing a passive element disposed on a substrate in the process of manufacturing the substrate, wherein the wiring is arranged on a specified wiring on the substrate. A determination unit that determines whether or not a passive element having a specified electrical characteristic can be disposed along the path of the line, and on the wiring in which the passive element having the specified electrical characteristic is specified by the placement determination unit. A passive element generating means for generating a passive element having the specified electrical characteristic along the path of the wiring on the specified wiring when it is determined that the passive element can be arranged along the path of the wiring. It is characterized by comprising.

  The present invention has been made to solve the above-described problem, and is a substrate design apparatus for designing a resistor disposed on a substrate in the process of manufacturing the substrate, and having a specified resistance value on the substrate. Resistance length calculation means for calculating the length of the resistor when the resistor is disposed on the specified wiring on the substrate along the path of the wiring, the length of the specified wiring and the resistance And a placement determination unit that determines whether or not the resistor having the designated resistance value can be placed based on the length of the wiring, and the placement determination unit causes the resistor having the designated resistance value to be placed in the designated wiring. Resistor generating means for generating a resistor having the specified resistance value along the path of the wiring on the specified wiring when it is determined that the wiring can be arranged along the path of the wiring. It is characterized by comprising.

  According to the present invention, in the board design apparatus according to claim 2, the placement determination unit determines that the resistor having the designated resistance value can be placed on the designated wiring along the route of the wiring. In this case, there is provided a presenting means for presenting the shape of the resistor generated by the resistor generating means to the operator.

  According to the present invention, in the board designing apparatus according to claim 2 or 3, the placement determining unit determines that the resistor having the designated resistance value cannot be placed on the designated wiring along the route of the wiring. In such a case, there is provided a presenting means for presenting an insufficient wiring length to the operator.

  According to the present invention, in the substrate design apparatus according to any one of claims 2 to 4, the resistor has a width within an allowable range that does not electrically and physically interfere with a wiring adjacent to the designated wiring. It is characterized by that.

  The present invention has been made to solve the above problems, and is a substrate design method for designing a passive element disposed on a substrate in the process of manufacturing the substrate, which has a specified resistance value on the substrate. The length of the resistor is calculated when the resistor is arranged on the specified wiring on the substrate along the path of the wiring, and based on the length of the specified wiring and the length of the resistor Then, it is determined whether or not the resistor having the designated resistance value can be disposed, and the resistor having the designated resistance value is arranged on the designated wiring along the route of the wiring by the placement determining means. When it is determined that the arrangement is possible, a resistor having the specified resistance value is generated along the path of the wiring on the specified wiring.

  According to the present invention, in the substrate design method according to claim 6, when it is determined that the resistor having the designated resistance value can be arranged on the designated wiring along the path of the wiring, the resistor is generated. The shape of the resistor generated by the means is presented to the operator.

  The present invention provides the substrate design method according to claim 6, wherein when it is determined that the resistor having the specified resistance value cannot be disposed on the specified wiring along the route of the wiring, the wiring length is insufficient. Is presented to the operator.

  Further, the present invention provides the substrate design method according to any one of claims 6 to 8, wherein the resistor has a width within an allowable range that does not electrically and physically interfere with a wiring adjacent to the designated wiring. It is characterized by having.

  The present invention has been made in order to solve the above-described problems, and is a board design program for designing a resistor disposed on a board during the board manufacturing process, which has a specified resistance value on the board. A resistance length calculating step for calculating a length of the resistor when the resistor is disposed on a specified wiring on the substrate along the path of the wiring; and the specified wiring length and the resistor A determination step for determining whether or not the resistor having the designated resistance value can be disposed based on the length of the resistor, and the resistor having the designated resistance value is placed on the route of the wiring on the designated wiring. And causing the computer to execute a resistor generating step of generating a resistor having the specified resistance value along the path of the wiring on the specified wiring. It is characterized by.

  Further, the present invention provides the board design program according to claim 10, wherein the resistor generating step has a width within an allowable range that does not electrically and physically interfere with a wiring adjacent to the specified wiring. It is characterized by generating.

As described above, according to the present invention, whether or not a passive element having a specified electrical characteristic can be placed on a designated wiring on the substrate along the route of the wiring by the placement determination means. If it is determined that the passive element having the designated electrical characteristics can be arranged on the designated wiring along the route of the wiring, the passive element generating means causes the passive element to be placed on the designated wiring. A passive element having the specified electrical characteristics is generated along the path of the wiring.
Therefore, passive elements having the desired electrical characteristics can be placed on the wiring on the substrate without being limited by the shape and installation area uniquely determined by the electrical characteristics, so the placement work efficiency of the passive elements, The effect that the freedom degree of design can be improved is acquired.

According to the present invention, the resistance in the case where a resistor having a specified resistance value on the substrate is arranged on the specified wiring on the substrate along the path of the wiring by the resistance length calculation means. The length of the body is calculated, and the placement determining means determines whether the resistor having the designated resistance value can be placed based on the length of the designated wiring and the length of the resistor, When it is determined that the resistor having the designated resistance value can be arranged on the designated wiring along the route of the wiring, the resistor generating means causes the route of the wiring on the designated wiring. A resistor having the designated resistance value is generated along the line.
Therefore, it is possible to arrange a resistor having a desired resistance value on the wiring on the substrate without being limited by the shape and installation area uniquely determined by the resistance value. The effect that the degree of freedom can be improved is obtained.

According to the present invention, when it is determined that the resistor having the designated resistance value can be arranged on the designated wiring along the route of the wiring, the presenting means causes the resistor generating means to The generated resistor shape is presented to the operator.
Therefore, it is possible to arrange a resistor having a desired resistance value on the wiring on the substrate without being limited by the shape and installation area uniquely determined by the resistance value. The degree of freedom can be improved, and further, the effect that the shape of the arranged resistor can be easily confirmed can be obtained.

Further, according to the present invention, when it is determined that the resistor having the specified resistance value cannot be arranged on the specified wiring along the route of the wiring, the presenting means sets an insufficient wiring length to the operator. To present.
Therefore, it is possible to arrange a resistor having a desired resistance value on the wiring on the substrate without being limited by the shape and installation area uniquely determined by the resistance value. The degree of freedom can be improved, and further, it is possible to easily determine how much wiring length is required in order to arrange a resistor having a desired resistance value.

According to the present invention, the resistor has a width within an allowable range that does not electrically and physically interfere with the wiring adjacent to the designated wiring.
Therefore, it is possible to arrange a resistor having a desired resistance value on the wiring on the substrate without being limited by the shape and installation area uniquely determined by the resistance value. The effect that the degree of freedom can be improved is obtained.

Further, according to the present invention, the length of the resistor when the resistor having the specified resistance value on the substrate is arranged on the specified wire on the substrate along the route of the wire is calculated. Then, based on the length of the designated wiring and the length of the resistor, it is determined whether the resistor having the designated resistance value can be arranged, and the designated resistance value is determined by the arrangement determining means. If it is determined that the resistor can be disposed on the designated wiring along the route of the wiring, the resistance value of the designated resistance value is determined along the route of the wiring on the designated wiring. Generate a resistor.
Therefore, it is possible to arrange a resistor having a desired resistance value on the wiring on the substrate without being limited by the shape and installation area uniquely determined by the resistance value. The effect that the degree of freedom can be improved is obtained.

Further, according to the present invention, when it is determined that the resistor having the specified resistance value can be arranged on the specified wiring along the path of the wiring, the resistance generated by the resistor generating means is generated. Present body shape to the operator.
Therefore, it is possible to arrange a resistor having a desired resistance value on the wiring on the substrate without being limited by the shape and installation area uniquely determined by the resistance value. The degree of freedom can be improved, and further, the effect that the shape of the arranged resistor can be easily confirmed can be obtained.

Further, according to the present invention, when it is determined that the resistor having the designated resistance value cannot be arranged on the designated wiring along the route of the wiring, an insufficient wiring length is presented to the operator.
Therefore, it is possible to arrange a resistor having a desired resistance value on the wiring on the substrate without being limited by the shape and installation area uniquely determined by the resistance value. The degree of freedom can be improved, and further, it is possible to easily determine how much wiring length is required in order to arrange a resistor having a desired resistance value.

Further, according to the present invention, a resistor having a width within an allowable range that does not electrically and physically interfere with a wiring adjacent to the designated wiring is generated.
Therefore, it is possible to arrange a resistor having a desired resistance value on the wiring on the substrate without being limited by the shape and installation area uniquely determined by the resistance value. The effect that the degree of freedom can be improved is obtained.

Further, according to the present invention, the length of the resistor when the resistor having the specified resistance value on the substrate is arranged on the specified wire on the substrate along the route of the wire is calculated. A resistance length calculation step, a determination step of determining whether or not the resistor having the specified resistance value can be arranged based on the length of the specified wiring and the length of the resistor, and the specified When it is determined that a resistor having a resistance value can be disposed on the designated wiring along the route of the wiring, the designated resistance is provided on the designated wiring along the route of the wiring. And causing the computer to execute a resistor generating step for generating a resistor of value.
Therefore, it is possible to arrange a resistor having a desired resistance value on the wiring on the substrate without being limited by the shape and installation area uniquely determined by the resistance value. The effect that the degree of freedom can be improved is obtained.

According to the invention, in the resistor generating step, the resistor having a width within an allowable range that does not electrically and physically interfere with a wiring adjacent to the designated wiring is generated.
Therefore, it is possible to arrange a resistor having a desired resistance value on the wiring on the substrate without being limited by the shape and installation area uniquely determined by the resistance value. The effect that the degree of freedom can be improved is obtained.

  Hereinafter, the best mode for carrying out the present invention will be described.

A. Configuration of Embodiment FIG. 1 is a block diagram showing a configuration of a circuit design device according to an embodiment of the present invention. In the figure, a circuit design unit 1 designs a wiring pattern on a printed circuit board in accordance with circuit diagram information input from an input unit in advance. The wiring data storage unit 2 stores designed wiring pattern information. The input unit 3 includes a keyboard, a pointing device, and the like. The circuit information, a wiring of a resistor to be arranged on the printed circuit board (hereinafter, designated wiring), and a resistance value (designated resistance) of the resistor are described below. Value) and so on. The display unit 4 displays a designed wiring pattern, a resistor disposed on a printed board described later, and the like.

  The resistance length calculator 5 calculates the length of a resistor having a specified resistance value. The resistor is made of a conductive paste and is formed along the path on the designated wiring, and the width thereof is equal to or less than the width of the designated wiring. However, the width of the resistor is not limited to this, and may be any width as long as it has an allowable range that does not cause electrical and physical interference with the wiring adjacent to the designated wiring.

  As shown in FIG. 2, the basic resistor data storage unit 6 includes the conductivity ρ of the conductive paste, the wiring width W as basic data required when calculating the length of the resistor having the specified resistance value. The resistor width Wr and the resistor thickness Tr are stored in advance. The placement determination unit 7 compares the length of the designated wiring with the calculated length of the resistor, and determines whether or not the resistor having the designated resistance value can be placed on the designated wiring.

  When it is determined that a resistor having a specified resistance value can be arranged on the designated wiring, the resistor generator 8 is equal to the width of the designated wiring arranged along the path on the designated wiring, or A resistor having the following width (according to the basic parameters of FIG. 2 above) is generated. When the placement determination unit 7 determines that the resistor having the designated resistance value cannot be placed on the designated wiring, the presentation control unit 9 displays the length of the missing wire on the display unit 4. When it is presented to the operator or it is determined that a resistor having a designated resistance value can be placed on the designated wiring, the shape of the resistor together with the designated wiring is displayed on the display unit 4 and presented to the operator.

B. Operation of Embodiment FIG. 3 is a flowchart showing a processing procedure of a substrate design method according to an embodiment of the present invention. First, an operator (for example, a designer) designates a wiring of a printed circuit board on which a resistor (passive element) is formed by the input unit 3 (S1), and sets a resistance value of the resistor to be formed on the designated wiring. Input (S2). Next, the resistance length calculator 5 calculates the length of the resistor having the designated resistance value (S3). More specifically, the resistor length having a width equal to or smaller than the width of the designated wiring (in this case, the width of the designated wiring is smaller than the width of the designated wiring because the resistor width Wr shown in FIG. 2 is used). Find the LT.

  Here, ρ is the conductivity of the resistor, S is the cross-sectional area of the resistor wiring (thickness Tr × resistor width Wr), and R is the specified resistance value. The resistor width Wr may be the same as the wiring width W.

  Next, the arrangement determination unit 7 compares the length of the designated wiring with the calculated resistor length LT, and determines whether or not a resistor having a designated resistance value can be arranged on the designated wiring (S4). Then, it is determined whether or not a resistor having the specified resistance value R and resistor length LT can be placed on the specified wiring (S5). That is, it is determined whether or not the length of the designated wiring ≧ the designated resistance length LT. When the length of the designated wiring is smaller than the designated resistance length LT, that is, when a resistor having the designated resistance value cannot be arranged on the designated wiring, the length of the insufficient wiring is set by the presentation control unit 9. It is displayed on the display unit 4 and clearly shown to the operator (S6).

  On the other hand, when the length of the designated wiring is equal to or greater than the designated resistance length LT, as shown in FIGS. 4A and 4B, a resistor having a designated resistance value can be arranged on the designated wiring. As described above, the resistor generator 8 has a width equal to or less than the width of the designated wiring (according to the basic parameters in FIG. 2 described above) arranged along the path on the designated wiring. Is generated (S7). Then, the presentation control unit 9 displays the shape of the resistor together with the designated wiring on the display unit 4 and presents it to the operator (S8). FIG. 4A shows an example in which a resistor 20 having the same width as the wiring width is arranged, and FIG. 4B shows a resistor 21 having a width narrower than the wiring width. An example is shown.

  According to the above-described embodiment, a resistor having a desired resistance value can be arranged on the wiring on the substrate without being limited by the shape and installation area that are uniquely determined by the resistance value as in the prior art. In addition, it is possible to improve the placement work efficiency of the resistor and the degree of freedom of design.

  In the above-described embodiment, the resistance length calculation unit 5, the arrangement determination unit 7, the presentation control unit 9, and the like are executed in a computer system. A series of processing steps by the resistance length calculation unit 5, the arrangement determination unit 7, and the presentation control unit 9 described above are stored in a computer-readable recording medium in the form of a program. By executing this, the above processing is performed. That is, it is realized by a central processing unit such as a CPU reading the program into a main storage device such as a ROM or RAM and executing information processing / calculation processing.

  Here, the computer-readable recording medium means a magnetic disk, a magneto-optical disk, a CD-ROM, a DVD-ROM, a semiconductor memory, or the like. Alternatively, the computer program may be distributed to the computer via a communication line, and the computer that has received the distribution may execute the program.

It is a block diagram which shows the structure of the board | substrate design apparatus by one Embodiment of this invention. It is a conceptual diagram which shows an example of the basic data required when calculating the length of the resistor of a designated resistance value. It is a flowchart which shows the process sequence of the resistor production | generation by this embodiment. It is a schematic diagram which shows an example of the resistor shown with designated wiring.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Circuit design part 2 ... Wiring data storage part 3 ... Input part 4 ... Display part 5 ... Resistance length calculation part (resistance length calculation means)
6 ... Resistor basic data storage unit 7 ... Arrangement determination unit (arrangement determination means)
8: Resistor generator (passive element generator, resistor generator)
9. Presentation control unit (presentation means)

Claims (11)

A board design device for designing passive elements arranged on a board during the board manufacturing process,
Arrangement determining means for determining whether or not a passive element having a specified electrical characteristic can be arranged on a specified wiring on the substrate along a path of the wiring;
When it is determined by the placement determination means that the passive element having the designated electrical characteristics can be placed along the route of the wiring on the designated wiring, the wiring of the wiring is designated on the designated wiring. And a passive element generating means for generating a passive element having the specified electrical characteristics along a path. A board design device for designing a resistor disposed on a board during the board manufacturing process,
A resistance length calculating means for calculating a length of the resistor when a resistor having a specified resistance value on the substrate is disposed on a specified wiring on the substrate along a path of the wiring;
An arrangement determining means for determining whether or not a resistor having the designated resistance value can be arranged based on the length of the designated wiring and the length of the resistor;
When the placement determining means determines that the resistor having the designated resistance value can be placed along the route of the wiring on the designated wiring, the wiring of the wiring on the designated wiring is determined. Resistor generating means for generating a resistor having the specified resistance value along a path. When it is determined by the placement determining means that the resistor having the designated resistance value can be placed on the designated wiring along the route of the wiring, the resistance of the resistor generated by the resistor generating means is determined. 3. The board design apparatus according to claim 2, further comprising a presentation unit for presenting the shape to the operator. Presenting means for presenting an insufficient wiring length to an operator when the placement determining means determines that the resistor having the designated resistance value cannot be placed on the designated wiring along the route of the wiring. 4. The substrate design apparatus according to claim 2, further comprising: 5. The board design apparatus according to claim 2, wherein the resistor has a width within an allowable range that does not electrically and physically interfere with a wiring adjacent to the designated wiring. A substrate design method for designing a passive element disposed on a substrate in the process of manufacturing the substrate,
Calculating a length of the resistor when a resistor having a specified resistance value on the substrate is disposed on a specified wire on the substrate along the path of the wire;
Based on the length of the designated wiring and the length of the resistor, it is determined whether the resistor having the designated resistance value can be arranged,
When the placement determining means determines that the resistor having the designated resistance value can be placed along the route of the wiring on the designated wiring, the wiring of the wiring on the designated wiring is determined. A substrate design method comprising generating a resistor having the specified resistance value along a path. When it is determined that the resistor having the specified resistance value can be arranged on the specified wiring along the path of the wiring, the shape of the resistor generated by the resistor generating means is presented to the operator. The substrate design method according to claim 6. 7. An insufficient wiring length is presented to an operator when it is determined that the resistor having the specified resistance value cannot be disposed on the specified wiring along the path of the wiring. PCB design method. The substrate design method according to claim 6, wherein the resistor has a width within an allowable range that does not electrically and physically interfere with a wiring adjacent to the designated wiring. A board design program for designing a resistor arranged on a board during the board manufacturing process,
A resistance length calculating step of calculating a length of the resistor when a resistor having a specified resistance value on the substrate is disposed on a specified wiring on the substrate along a path of the wiring; and
A determination step of determining whether or not the resistor having the specified resistance value can be arranged based on the length of the specified wiring and the length of the resistor;
When it is determined that the resistor having the designated resistance value can be disposed on the designated wiring along the route of the wiring, the resistor along the route of the wiring is provided on the designated wiring. A board design program for causing a computer to execute a resistor generating step for generating a resistor having a specified resistance value. 11. The board design program according to claim 10, wherein the resistor has a width within an allowable range that does not electrically and physically interfere with a wiring adjacent to the designated wiring.

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