JP2705469B2 - Mask data creation device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for creating mask data which is used as an inspection reference of a mounting board appearance inspection apparatus for automatically inspecting a mounting state of an electronic component mounted on a printed circuit board, a hybrid IC, or the like.

[0002]

2. Description of the Related Art Conventionally, printed circuit boards and hybrid ICs
In the case of inspecting the mounting state of electronic components mounted on, for example, defective soldering or the like, the inspection is performed visually.

However, in recent years, the present applicant has developed an apparatus for automatically inspecting a soldering defect or a so-called bridge by irradiating a printed circuit board on which electronic components are mounted with infrared rays and detecting the reflected light. Was. In this case, in order to create mask data serving as an inspection standard of a mounting board appearance inspection apparatus to be automatically inspected, a component mounting position is measured from a component mounting drawing or a printed board, and a mask is created for each component one by one. The work was done manually.

[0004]

However, as described above, the method of manually creating all the necessary masks on a printed circuit board one by one has a problem that it is troublesome and time-consuming. In addition, it is difficult to utilize the created data for other substrates, and there is a problem that it is inefficient in terms of reuse.

SUMMARY OF THE INVENTION The present invention solves such a conventional problem. Mask data can be created in a short time, and master data created in the past can be efficiently used for other substrates. It is intended to provide a device.

[0006]

In order to achieve the above object, the present invention provides a component library storage device for storing component-specific information, and component mounting position data for storing information on mounting positions of components on a printed circuit board. A file and a component library search processing function for searching for corresponding component information from the component library according to the component mounting data; a component library expansion processing function for expanding the searched component library; and the expanded component library. The configuration includes mask editing function means for editing a mask, and mask calculation processing function means for calculating and adding / correcting the edited mask.

[0007]

Therefore, according to the present invention, a storage device for registering a component library, a storage device for component mounting position data, and an arithmetic circuit for expanding the component library along the component mounting position data are provided. Since the mask data can be automatically created from the component mounting position data, the mask data can be created in a short time, and the data of the component library can be used on different boards, which is efficient.

[0008]

FIG. 1 is an overall schematic explanatory diagram of a mask data creating system according to an embodiment of the present invention.

In FIG. 1, reference numeral 1 denotes a component library storage device for storing the shape of an electronic component and other information unique to the component;
Is a component mounting position data file for storing information on mounting positions of electronic components on a printed circuit board; 3 is a component library search processing function for retrieving corresponding component information from a component library according to component mounting data; Part library development processing function means for developing a library, 5
Is a mask editing function means for editing a mask using the developed parts library, and 6 is a mask editing function for calculating and adding an edited mask.
A mask calculation processing function means 7 for correcting the data is a mask data file for storing the created mask data.

In the system shown in FIG. 1, a component library specified by a component mounting position data file is searched from a component library storage device by a component library search function, and is expanded at coordinates and angles determined by the component library expansion function. I do. If necessary, operations such as addition and correction of a mask are performed using a mask editing function, and calculations are performed by a mask calculation processing function to create a mask data file.

In this embodiment, the above system is realized on a personal computer.

The above system will be described in more detail. The mounting board appearance inspection apparatus divides a portion to be inspected, such as a printed board, into rectangular areas, and performs an inspection based on data to which information such as a determination method and constants and allowable values required for calculation are added. This data is called a mask, and a set of all the masks on the printed circuit board in one file is called a mask data file. The mask of one printed circuit board is roughly classified as follows from the viewpoint of a mask data file creation method.

First, as long as the components mounted on the printed circuit board have the same shape, even if the mounting position and the type of the printed circuit board are different, the inspection position for the component is the same, so the mask for the component is the same. Is fine. This is called a part-specific mask. In the inspection of the solder bridge between the components, the mounting state of the components is different when the types of the printed circuit boards are different. Therefore, the inspection points on the printed circuit boards need to be changed for each type of the printed circuit boards. This is called a substrate-specific mask.

Therefore, the components to be inspected are classified according to their shapes, a library name is given to each of them, a component shape and a mask unique to the component are set, and registered in the component library. Coordinates specified in the component position data file
By arranging and calculating at an angle, a mask for a component on a printed circuit board can be created.

FIG. 2 shows the contents of one component library. In FIG. 2, a hatched portion 8 is a component shape, 9 to 10 are masks for detecting a displacement and rotation of the component in the X-axis direction, 11 is a mask for detecting a displacement and rotation of the component in the Y-axis direction, and 12 is a mask for detecting the displacement and rotation of the component in the Y-axis direction. Missing / standing detection masks, and reference numerals 13 to 15 denote solder presence / absence detection masks.

One mask has a lower left point as a starting point, an upper right point as an ending point, a coordinate value with the center of the part as an origin, a judging method for deciding an inspection item, and six kinds of operations and judging. As shown in FIG. 2, a plurality of different masks are set for each inspection item such as a component shape and 9 to 15 in one component library.

Detecting displacement / rotation in X-axis direction 11
In the case of the mask described above, the position at which the component causes the maximum allowable deviation is calculated, and a mask that is longer in the X-axis direction of the component and about の of the length of the package portion of the component in the Y-axis direction is set. The height in the mask is measured and calculated, the position of the mounted component is obtained, and the value is compared with the value to be mounted to detect a position shift.

In the case of the masks 13 to 15 for detecting the presence or absence of solder, the mask is set at a place where a solder fillet is to be formed, the brightness in the mask is measured and calculated, and the presence or absence of solder is detected.

As described above, all necessary masks which are different for each component are determined for each component shape and each judgment item, and are registered in the component library.

FIG. 3 shows the contents of the component position data file. When the various component libraries as shown in FIG. 2 are arranged according to the content of the component position data in FIG. 3 by the component library search processing function and the component library development processing function, the result is as shown in FIG.

In this state, only the mask is taken out, and a mask calculation processing function is used to calculate a coordinate value with the lower left point of the mask as the starting point, the upper right point as the end point, and the lower left corner of the printed circuit board as the origin, and the judgment method and tolerance. All masks on the printed circuit board in which part numbers and circuit symbols are added to mask data such as values are output as mask data files. This makes it possible to create component-specific masks for all components on the printed circuit board.

Further, a board-specific mask which must be set for each type of printed circuit board, such as inspection of a solder bridge between components, cannot be set in the component library. Such a board-specific mask is obtained by arranging components on a printed board as shown in FIG. 4 and then setting a mask directly on the board by using a mask editing function shown in 5 of FIG.
The result is shown in FIG. In FIG. 5, reference numerals 16 and 17 denote masks for detecting bridges between components. In this manner, all necessary masks specific to the board are set using the mask editing processing function, and the same processing is performed and output as a mask data file, whereby all the masks necessary for inspection on the printed board can be created.

As described above, the storage device for registering the component library, the storage device for the component mounting position data, and the function means for searching, developing, and calculating the component library according to the component mounting position data are provided. Since the mask data can be automatically created from the component mounting position data, the mask data can be created in a short time, and the data of the same component library can be used on different boards, which is efficient.

Further, as shown in FIG.
By providing a function means 19 for creating a component position data file from such data 18, a mask data file 20 on a single printed circuit board can be created in a short time with almost no labor.

[0025]

As described above, according to the present invention,
It has a storage device for registering the component library, a storage device for the component mounting position data, and a function unit for searching, developing, and calculating the component library along with the component mounting position data. Since the mask can be created and the data of the component library can be used on different substrates, there is an effect that the efficiency is high.

[Brief description of the drawings]

FIG. 1 is an overall schematic explanatory diagram of a mask data creation system according to an embodiment of the present invention.

FIG. 2 is an explanatory diagram showing an example of the system component library;

FIG. 3 is an explanatory diagram of a component mounting position data file used in the system.

FIG. 4 is an explanatory diagram after a component library is arranged along a component mounting position data file;

FIG. 5 is an explanatory diagram after a component library is arranged along a component mounting position data file and a mask unique to a board is set;

FIG. 6 shows a printed circuit board C for a component mounting position data file.
General schematic explanatory diagram when creating from AD data

[Explanation of symbols]

REFERENCE SIGNS LIST 1 component library storage device 2 component mounting position data file 3 component library search processing function unit 4 component library development processing function unit 5 mask editing function unit 6 mask calculation processing function unit 7 mask data file 8 component shape of component library 9 component library Mask for detecting displacement / rotation 10 Mask for detecting displacement / rotation of component library 11 Mask for detecting displacement / rotation of component library 12 Mask for detecting missing / standing components in component library 13 Mask for detecting presence / absence of solder in component library 14 Mask for detecting the presence or absence of solder in the component library 15 Mask for detecting the presence or absence of solder in the component library 16 Mask for detecting the solder bridge between components set on the board 17 Mask for detecting the solder bridge between components set on the board 18 CAD data of the printed board 19 other parts position data creation function 20 component mounting position data file

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Takumi Shido 4-3-1 Tsunashima Higashi, Kohoku-ku, Yokohama-shi, Kanagawa Prefecture Inside Matsushita Communication Industrial Co., Ltd. (72) Inventor Junzo Seta Tsunashima-Higashi, Kohoku-ku, Yokohama, Kanagawa Prefecture 4-3-1, Matsushita Communication Industrial Co., Ltd. (72) Inventor Akio Yasuda 4-3-1 Tsunashima Higashi, Kohoku-ku, Yokohama-shi, Kanagawa Prefecture Matsushita Communication Industrial Co., Ltd. (56) References JP-A-4-169803 (JP, A) JP-A-62-261047 (JP, A) JP-A-62-190448 (JP, A) JP-A-4-107990 (JP, A) JP-A-4-242482 (JP, A) JP-A-63-58854 (JP, A) JP-A-64-88879 (JP, A) JP-A-2-95552 (JP, A)

Claims (1)

(57) [Claims] 1. A component library storage device for storing component-specific information, a component mounting position data file for storing information on mounting positions of components on a printed circuit board, and a corresponding component from a component library according to the component mounting data. A part library search processing function for searching for information; a part library development processing function for expanding the searched part library; a mask editing function for editing a mask using the developed part library; and calculating the edited mask Mask calculation processing means for adding and modifying the mask data, and creating mask data files for automatically inspecting the mounting state of the components mounted on the printed circuit board from the component library and the component mounting position data apparatus.