WO2020007333A1

WO2020007333A1 - Environment-friendly integrated circuit board sorting control process

Info

Publication number: WO2020007333A1
Application number: PCT/CN2019/094633
Authority: WO
Inventors: 李若梅
Original assignee: 合肥市智慧桥信息科技有限公司
Priority date: 2018-07-04
Filing date: 2019-07-03
Publication date: 2020-01-09
Also published as: JP2020526379A; JP6767590B2; CN108971021A

Abstract

An environment-friendly integrated circuit board sorting control process. A control system of the environment-friendly integrated circuit board sorting control process comprises a jet printer (1, 2), a vacuum tube, a printable suction cup (5, 6), a manipulator (9), a manipulator controller (10), an industrial personal computer (8), a jet printing controller (7), a conveyor belt (11), an image detection device, and a vacuum inking integrated tube (3, 4). The control process comprises: the image detection device distinguishes and recognizes a classification of a defective product by comparing a photographed image of an integrated circuit board with a standard image; and the industrial personal computer controls the manipulator to sort the defective products according to a result of the image detection device, and simultaneously controls the jet printer to perform jet printing of corresponding content. The process can better distinguish different classifications of defective products, selectively sort and mark the defective products, and can ensure that an integrated circuit board is not damaged when being gripped and carried.

Description

Environment-friendly integrated circuit board sorting control process

Technical field

The invention relates to an environmental protection type integrated circuit board sorting control process, in particular to a control process for sorting defective products of integrated circuit boards.

Background technique

In the prior art, the manufacturing of integrated circuit boards uses screen printing for rapid manufacturing, specifically using a screen printing machine with solder paste to print on the circuit board substrate to obtain a processed integrated circuit board. The manipulator can take many forms. The most commonly used is a suction cup robot. The use of a suction cup can avoid the risk of damage or falling of the integrated circuit board due to improper control of the clamping force of the gripping robot. The structure of the suction cup is simple and the function reliable.

During the manufacturing process of integrated circuits, due to the use of screen printing, there are faults such as missing solder paste dots during printing or excessive solder paste causing overflow printing and excessively thick printed lines, which will cause the product to have a certain defective rate. In the prior art, image detection is used. When a defective product is detected, the defective product is removed manually, and the work efficiency is low.

And in the sorting of defective products by image detection technology, only the defective products that do not meet the detection standards are separated from the qualified products, and the defective products are not classified. There are defective products caused by screen printing in integrated circuit manufacturing. According to the reasons, it can be divided into missed defective products and excessive solder paste defective products. For the two defective products, missed defective products cannot be repaired and are actually defective products, but for solder paste overflow defective products. The solder paste overflow can be removed by cleaning technology, so this type of defective products can be repaired. However, the prior art fails to distinguish the above two types of defective products of the integrated circuit manufactured by the screen printing technology, which causes the defective products to be processed together, resulting in great waste. That is, in this field, this technical problem has not been discovered.

In addition, when the suction cup robotic arm is used for suctioning the integrated circuit, due to the effect of vacuum suction, there is a certain probability that the solder paste on the integrated circuit will fall off and the integrated circuit will be damaged. Therefore, the structure of the robot arm needs to be improved to ensure that the suction cup grasps the integrated circuit. Take safety and reliability.

Summary of the invention

In view of the problems in the prior art, the present invention provides an environmentally friendly integrated circuit board sorting control process, which can better distinguish different defective products, selectively sort and mark the defective products, and can ensure that The integrated circuit board is not damaged during handling.

In order to achieve the above object, the present invention provides an environmentally friendly integrated circuit board sorting control process. The control system includes two printers, two printable suction cups, a robot arm, a robot controller, an industrial computer, and a printer. Controller, conveyor belt, image detection device, two vacuum and ink delivery integrated tubes, industrial control machine is connected to robot controller, printing controller, robot controller is connected to robot, printing controller is connected to two printers and Two printable suction cups are connected. The integrated circuit board is manufactured by screen printing. There are two cavities in the vacuum and ink delivery integrated tube, which are the gas lumen and the solder paste conveying lumen. The inkjet printer passes the solder paste. The conveying tube cavity is connected with the printing part on the printable suction cup, and the air pump is connected with the vacuum generating part on the shell printing suction cup through the gas lumen. The control process includes: the image detection device is based on the image taken on the conveyor belt. The image of the integrated circuit board is compared with the standard image to distinguish the defective product, and the type of the defective product is distinguished. The industrial computer controls the manipulator to perform the residual operation based on the result of the image detection device. Sort the defective products and control the printer to print the corresponding content at the same time. For the defective products of the first type, the robot rotates the first angle horizontally about the axis to place the defective products in the collecting device of the defective products of the first type. For the second type of defective products, the manipulator rotates horizontally around the axis at a second angle different from the first angle to place the second type of defective products in the collection device of the second type of defective products, and the printer is integrated Marks are printed on the circuit board; the printable suction cup is circular, with a rectangular vacuum generating part in the middle, the bottom of the rectangular frame of the vacuum generating part has a sealing strip for airtightness, and the inside of the rectangular frame of the vacuum generating part has a vacuum. Zone, vacuum zone with regularly distributed flexible buffer stripes, the flexible buffer stripes are composed of multiple small rectangular stripe blocks, each small rectangular stripe block has a vertical and horizontal space, each small rectangular stripe block is composed of diagonal stripes There is a gap between each diagonal stripe, so that the suction cup has a strong suction force and a good buffering performance; the round edge of the printable suction cup and the rectangular frame of the vacuum generating part are provided. Printing area, the printing area is composed of two spout blocks, and a partition plate is formed between the two spout blocks. Each spout block is divided into two parts, with a fine gap in the middle and the fine gap as the axis of symmetry. The size of the nozzles is arranged from the middle and the axial sides from small to large, so as to ensure that the printing process will not cause the loss of the printing paste due to the influence of the air flow due to the movement of the manipulator and vacuum extraction. Each nozzle block is divided and controlled, and can print different pattern characters separately; the printer includes a fast ink ejection section, and the rapid ink ejection section includes a casing, an ink channel, a filter, a transition solder paste reservoir, and an ink channel. The solder paste flows in from the ink channel and is filtered by the filter and then enters the transition solder paste reservoir. When printing is needed, it can be quickly and directly supplied through the ink channel. The first type of defective products are missing and defective products. The first mark of the defective product is printed on the surface. The second type of defective product is the solder paste overflow defective product, and the printer prints the second mark on the surface.

The main invention points of the present invention are: 1. The use of a manipulator that can rotate at two angles can distinguish the types of defective products, to prevent the repairable defective products from being abandoned, and to be more environmentally friendly; 2. The use of a printer combined with a robotic suction cup The above method can perform differential printing of defective products while moving the integrated circuit board, saving time and equipment space; 3. The flexible buffer stripes arranged as described above can ensure the suction while ensuring the integrated circuit board and the manipulator. Flexible connection to avoid damage to the integrated circuit board; 4. The nozzle size of each nozzle block is arranged from small to large on both sides of the axial direction, thereby ensuring that the printing process will not cause printing due to the movement of the manipulator and vacuum pumping. The edge of the pattern loses the solder paste due to the influence of the airflow; 5. The printer includes a fast ink outlet, which can be printed immediately when printing is needed, without excessive equipment waiting time.

BRIEF DESCRIPTION OF THE DRAWINGS

In order to more clearly explain the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings in the following description are merely These are some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without paying creative labor.

FIG. 1 is a schematic diagram of an environmentally friendly integrated circuit board sorting control system of the present invention;

FIG. 2 is a schematic diagram of a suction cup rectangular vacuum generating part of the environmental protection type integrated circuit board sorting control system of the present invention.

FIG. 3 is a schematic diagram of a printer of the environmental protection integrated circuit board sorting control system of the present invention; FIG.

FIG. 4 is a schematic diagram of a printing area of the environmental protection integrated circuit board sorting control system of the present invention.

detailed description

In the following, the technical solutions in the embodiments of the present invention will be clearly and completely described with reference to the drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, but not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by a person of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

In the following description, many specific details are set forth in order to fully understand the present invention, but the present invention can also be implemented in other ways than those described herein, and those skilled in the art can do this without violating the meaning of the present invention. Similar promotion, so the present invention is not limited by the specific embodiments disclosed below.

The missed defective products involved in the present invention are defective products caused by missing part of the printed pattern when the integrated circuit is screen-printed. Solder paste overflow defective products are caused by excessive solder paste during screen printing. Defective solder paste is printed on the place where the solder paste should not be printed on the printed pattern, which causes the solder paste to overflow, and can be repaired by local solvent cleaning or other existing methods.

The image detection device in the present invention can coordinate by software through a plurality of positioned cameras, and then compare the difference between the product snapshot and the standard image, determine the difference in optical density of each part by an algorithm, and determine that the printed image is a missing print. There is still solder paste overflow, which is a common technique.

The vacuum generating part of the present invention has a rectangular frame for providing airtightness, and the flexible buffer stripes are slight protrusions, and may be composed of rubber or a flexible composite material.

The invention provides an environmental protection integrated circuit board sorting control process, which includes two inkjet printers 1, 2, two inkjet printable suction cups 5, 6, a robot 9, a robot controller 10, an industrial control machine 8, and inkjet printing. Controller 7, conveyor belt 11, image detection device, two vacuum and ink delivery integrated tubes 3 and 4, the industrial control machine is connected to the robot controller, the printing controller, the robot controller is connected to the robot, and the printing controller is connected to the two Each printer is connected to two printable suction cups. The integrated circuit board is manufactured by screen printing. The vacuum and ink delivery integrated tube has two cavities, namely a gas lumen and a solder paste delivery lumen. The printer is connected to the printing section on the printable suction cup through the solder paste conveying lumen, and the air pump is connected to the vacuum generating section on the shell printing chuck through the gas lumen. The control process includes: the image detection device according to the shooting on the conveyor belt The image of the integrated circuit board is compared with the standard image to distinguish the defective product and distinguish the type of the defective product. The industrial computer controls the robot to sort the defective products and control the printer at the same time according to the result of the image detection device. Perform the corresponding content printing. For the first type of defective products, the manipulator rotates the first angle horizontally about the axis to place the defective products in the collection device of the first type of defective products. For the second type of defective products, the robotic arm Rotate the second angle different from the first angle horizontally around the axis to place the second type of defective products in the second type of defective products collection device. The printer prints marks on the integrated circuit board; The suction cup is circular, the middle part of which has a rectangular vacuum generating part 12, the bottom of the rectangular frame of the vacuum generating part has a sealing strip for airtightness, the rectangular frame of the vacuum generating part has a vacuum area inside, and the vacuum area has a regular distribution of flexibility Buffer stripe 123, the flexible buffer stripe is composed of a plurality of small rectangular stripe blocks, and there is a vertical and horizontal space between each small rectangular stripe block. Each small rectangular stripe block is composed of diagonal stripe strips, and between each diagonal stripe stripe. There is a gap to ensure that the suction cup has a strong suction force and a good buffering performance; there is a printing area between the circular edge of the printable suction cup and the rectangular frame of the vacuum generating part, and the printing area consists of two The nozzle block is composed of a partition plate between the two nozzle blocks. Each nozzle block is divided into two parts, with a fine gap in the middle, and the fine gap is used as the axis of symmetry. The nozzle size of each nozzle block is presented by the central and axial sides. The arrangement is from small to large, so that the printing process will not cause the loss of the printing paste due to the influence of the air flow due to the movement of the robot and the vacuum pumping. Each nozzle block is controlled by partitions, which can be separately controlled. Print different pattern characters; the inkjet printer includes a fast ink outlet 14 which includes a housing 17, an ink inlet 15, a filter 18, a transition solder paste storage 19, and an ink outlet 16, and the solder paste is from Ink channel flows in, passes through the filter and enters the transition solder paste reservoir. When printing is needed, it can be quickly and directly supplied through the ink channel. The first type of defective products are missed defective products, and the printer is on its surface. The first mark is printed, and the second type of defective products are solder paste overflow defective products, and the printer prints the second mark on its surface.

Each part in this specification is described in a progressive manner. Each part focuses on the differences from other parts, and the same or similar parts between the parts can refer to each other. The foregoing description of the disclosed embodiments enables those skilled in the art to implement or use the present invention.

Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the present invention will not be limited to the embodiments shown herein, but should conform to the widest scope consistent with the principles and novel features disclosed herein.

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Claims

An environmentally friendly integrated circuit board sorting control process. The control system includes two printers, two printable suction cups, a robot, a robot controller, an industrial control machine, a printer controller, a conveyor belt, and an image detection device. 2. Two vacuum and ink transfer integrated tubes. The industrial control machine is connected to the robot controller and the printing controller respectively. The robot controller is connected to the robot. The printing controller is connected to two printers and two printable suction cups. The integrated circuit board is manufactured by a screen printing process. There are two cavities in the vacuum and ink delivery integrated tube, which are a gas lumen and a solder paste delivery lumen. The printer passes the solder paste delivery lumen and the printable suction cup. The printing unit is connected, and the air pump is connected to the vacuum generating unit on the shell printing chuck through the gas lumen. The control process includes: the image detection device performs the process based on the image of the integrated circuit board and the standard image taken on the conveyor belt. Contrast, distinguish the defective products, and distinguish the type of defective products. According to the result of the image detection device, the industrial control computer controls the robot to sort the defective products and control the printer's feeding at the same time. For the corresponding content printing, for the first type of defective products, the robot rotates the first angle horizontally around the axis to place the defective products in the first type of defective products collection device. For the second type of defective products, the robot turns The shaft rotates horizontally at a second angle different from the first angle to place the second type of defective products in the collection device of the second type of defective products, and the printer prints the marks on the integrated circuit board; the printable suction cup It is circular, with a rectangular vacuum generating part in the middle, a sealing strip for airtightness at the bottom of the rectangular frame of the vacuum generating part, a vacuum region inside the rectangular frame of the vacuum generating part, and a regularly distributed flexible buffer stripe in the vacuum region The flexible buffer stripes are composed of a plurality of small rectangular stripe blocks, and there is a vertical and horizontal interval between each small rectangular stripe block. Each small rectangular stripe block is composed of diagonal stripe strips, and there is a gap between each diagonal stripe stripe. This ensures that the suction cup has a strong suction force and has a good buffering performance. There is a printing area between the circular edge of the printable suction cup and the rectangular frame of the vacuum generating part, and the printing area is composed of two nozzle blocks. There is a separating plate between the two nozzle blocks. Each nozzle block is divided into two parts, with a small gap in the middle. The fine gap is used as the axis of symmetry. The nozzle size of each nozzle block is shown from small to large from the middle and axial sides. So that the printing process will not cause the edge of the printing pattern to lose the solder paste due to the influence of the airflow due to the movement of the robot and the vacuum pumping. Each nozzle block is controlled by partitions and can be printed separately. The pattern text; the printer includes a fast ink outlet, the fast ink outlet includes a housing, an ink channel, a filter, a transition solder paste reservoir, and an ink channel. The solder paste flows from the ink channel and is filtered by the filter. After entering the transition solder paste reservoir, when printing is needed, it can be directly and quickly fed out through the ink outlet; the first type of defective products are missed defective products, and the printer prints the first mark of defective products on its surface. The second-class defective products are solder paste overflow defective products, and the printer prints the second mark on its surface.