CN219872117U - Film alignment device of inner layer exposure machine - Google Patents

Abstract

The utility model relates to the technical field of PCB manufacture, and provides a film alignment device of an inner layer exposure machine, which comprises: the camera moving assembly comprises a frame, a guide rail, an alignment camera, a first sliding seat and a second sliding seat, wherein the guide rail is fixedly connected with the frame, the first sliding seat is in left-right sliding connection with the guide rail, the second sliding seat is in front-back sliding connection with the first sliding seat, the alignment camera is fixedly connected with the second sliding seat, and a detection port of the alignment camera is arranged downwards; the upper film bearing component comprises a first bearing plate and an upper film, the upper film is provided with dot alignment marks, and the upper film is arranged below the alignment camera; the lower film bearing assembly comprises a second bearing plate and a lower film, wherein the lower film is provided with a circular ring alignment mark, and the lower film is arranged below the upper film. The utility model has the advantages that: through camera moving assembly, can adjust the position of counterpoint camera about, detect the film counterpoint mark of different positions, expose the PCB makeup of equidimension.

Description

Film alignment device of inner layer exposure machine

Technical Field

The utility model relates to the technical field of PCB manufacture, in particular to a film alignment device of an inner layer exposure machine.

Background

The exposure machine can be through the pattern printing of light source subassembly on with the film on to the PCB makeup, in the pattern transfer process, with the pattern printing of last film on the upper surface of PCB makeup, with the pattern printing of lower film on the lower surface of PCB makeup, the alignment precision of last film and lower film directly influences the pattern alignment precision of makeup.

Common circuit boards are divided into single-sided wiring and double-sided wiring, commonly called a single panel and a double-sided board, but high-end electronic products are limited by product space design factors, multiple layers of circuits can be stacked inside the electronic products except for surface wiring, and in the production process, after each layer of circuits is manufactured, the circuits are positioned and pressed through optical equipment, so that the multiple layers of circuits are stacked in one circuit board, commonly called a multiple-layer circuit board. The inner layer refers to the circuit pattern of the inner layer of the multilayer circuit board.

The PCBs are spliced together according to a certain arrangement, after the PCB manufacture is completed, the spliced plates are cut apart to obtain each PCB, and the size of the spliced plates is improved, so that the production efficiency can be improved. The existing inner layer exposure machine is distributed with four alignment cameras, the alignment cameras are mounted on a frame, the positions of the alignment cameras are fixed and cannot move, so that the positions of alignment marks (CCD alignment points) of an upper film and a lower film are fixed, the alignment marks are consistent with the positions of the alignment cameras, and when the alignment cameras recognize that the alignment marks of the upper film and the lower film are matched, the alignment of the upper film and the lower film is successful. When the PCB jointed board shields the alignment marks of the upper film and the lower film, the camera cannot recognize the alignment marks to match.

As shown in FIG. 1, a design pattern of extreme dimensions is shown for the positional relationship between the PCB panels and the film. When the PCB jointed board with larger width is required to be produced, the positions of the upper film and the lower film with larger width and the alignment marks of the upper film and the lower film are changed, so that the positions of the alignment cameras of the exposure machine are required to be adjusted, and the film alignment marks at different positions are detected.

Disclosure of Invention

The utility model aims to solve the technical problem of providing a film alignment device of an inner layer exposure machine, which can adjust the position of an alignment camera and detect film alignment marks at different positions.

The utility model is realized in the following way: a film alignment device of an inner layer exposure machine comprises:

the camera moving assembly comprises a frame, a guide rail, an alignment camera, a first sliding seat and a second sliding seat, wherein the guide rail is fixedly connected with the frame, the first sliding seat is in left-right sliding connection with the guide rail, the second sliding seat is in front-back sliding connection with the first sliding seat, the alignment camera is fixedly connected with the second sliding seat, and a detection opening of the alignment camera is arranged downwards;

the upper film bearing assembly comprises a first bearing plate and an upper film, wherein the first bearing plate is provided with a first light transmission groove, the upper film is installed in the first light transmission groove, the upper film is provided with dot alignment marks, the upper film is arranged below the alignment camera, and the first bearing plate is connected with the frame through a first positioning assembly;

the lower film bearing assembly comprises a second bearing plate and a lower film, wherein a second light transmission groove is formed in the second bearing plate, the lower film is installed in the second light transmission groove, a circular ring alignment mark is arranged on the lower film, the lower film is arranged below the upper film, and the second bearing plate is connected with the frame through a second positioning assembly.

Further, the guide rails are two and arranged in parallel, two ends of each guide rail are provided with one alignment camera, four corners of the upper film are provided with the dot alignment marks, and four corners of the lower film are provided with the ring alignment marks.

Further, the camera moving assembly further comprises an alignment indicator light, and the alignment indicator light is electrically connected with the alignment camera.

Further, the first positioning assembly and the second positioning assembly have the same structure and comprise a first positioning motor, a first ball screw, a first positioning frame plate, a second positioning motor, a second ball screw and a second positioning frame plate, wherein the first positioning frame plate is transversely and slidably connected with the inside of the second positioning frame plate, a machine body of the first positioning motor is fixedly connected with the second positioning frame plate, an output shaft of the first positioning motor is connected with the first positioning frame plate through the first ball screw, the second positioning frame plate is longitudinally and slidably connected with the frame, the machine body of the second positioning motor is fixedly connected with the frame, and an output shaft of the second positioning motor is connected with the second positioning frame plate through the second ball screw;

the first bearing plate is fixedly connected with the first positioning frame plate of the first positioning assembly, and the second bearing plate is fixedly connected with the first positioning frame plate of the second positioning assembly.

Further, the alignment marks arranged on the upper film are circular rings, and the alignment marks arranged on the lower film are dots.

Further, the dot alignment marks are divided into a first size dot alignment mark and a second size dot alignment mark, and the second size dot alignment mark is positioned on the horizontal outer side of the first size dot alignment mark;

the ring alignment marks are divided into a first-size ring alignment mark and a second-size ring alignment mark, and the second-size ring alignment mark is positioned on the horizontal outer side of the first-size ring alignment mark.

Further, a PCB jointed board is arranged between the upper film and the lower film;

when the left and right boundaries of the PCB jointed board are close to and do not shade the first size dot alignment marks, the alignment camera detects the alignment condition of the first size dot alignment marks and the first size circular ring alignment marks;

when the left and right boundaries of the PCB jointed board are close to and do not shade the second-size dot alignment marks, the alignment camera detects the alignment condition of the second-size dot alignment marks and the second-size circular ring alignment marks.

The utility model has the advantages that: 1. through camera moving assembly, can adjust the position of counterpoint camera about, detect the film counterpoint mark of different positions, expose the PCB makeup of unidimensional, adapt to the change of production demand, when counterpoint camera detects dot counterpoint mark and ring counterpoint mark for same centre of a circle, last film is counterpoint successful with lower film, the pattern of upper and lower film is accurate printing respectively on the upper and lower surface of PCB makeup through exposing this moment, when counterpoint camera detects dot counterpoint mark and ring counterpoint mark not same centre of a circle, go up film and lower film counterpoint unsuccessful promptly, do not expose the work. 2. When the alignment of the upper film and the lower film is unsuccessful, or the alignment mark of the shielding part of the PCB jointed board, the first alignment assembly and the second alignment assembly respectively fine-tune the positions of the upper film and the lower film, so that the correction alignment speed is improved. 3. One film has two size alignment marks, so that one film can be used for exposing the PCB jointed boards with two limit sizes, the cost of the film is saved, and the production efficiency is improved.

Drawings

The utility model will be further described with reference to examples of embodiments with reference to the accompanying drawings.

Fig. 1 is a schematic diagram of a positional relationship between a PCB panel and a film in the background art.

Fig. 2 is a schematic plan view of a film alignment device of the inner layer exposure machine of the present utility model.

Fig. 3 is a schematic view of a PCB panel of the present utility model between an upper film and a lower film.

FIG. 4 is a schematic view of the position of the ring alignment mark on the lower film according to the present utility model.

FIG. 5 is a schematic diagram of the successful alignment of the dot alignment marks and the ring alignment marks according to the present utility model.

FIG. 6 is a schematic diagram of a positioning assembly according to the present utility model.

FIG. 7 is a schematic diagram of the upper film with first size dot alignment marks and second size dot alignment marks according to the present utility model.

FIG. 8 is a schematic view of the PCB panel of the present utility model with the left and right borders close to and not obstructing the alignment marks of the dots of the first size.

FIG. 9 is a schematic view of the PCB panel of the present utility model with the left and right edges thereof approaching and not obstructing the second size dot alignment marks

Reference numerals: a camera moving assembly 1; a frame 11; a guide rail 12; an alignment camera 13; a first carriage 14; a second slider 15; a film bearing assembly 2; a first carrier plate 21; a film 22; dot alignment marks 23; first size dot alignment marks 231; second size dot alignment marks 232; a lower film carrier plate stage 3; a second carrier plate 31; a lower film 32; a ring alignment mark 33; PCB jointed board 4; a first positioning assembly 5; a first positioning motor 51; a first ball screw 52; a first positioning frame plate 53; a second positioning motor 54; a second ball screw 55; a second positioning frame plate 56; a second positioning assembly 6.

Detailed Description

The technical scheme of the embodiment of the utility model provides a film alignment device of an inner layer exposure machine, overcomes the defect of fixed position of an alignment camera in the background technology, and realizes the technical effects of adjusting the position of the alignment camera, detecting film alignment marks at different positions and exposing PCB jointed boards with more sizes.

The general idea of the technical scheme of the embodiment of the utility model is as follows:

the camera moving assembly enables the alignment to be adjusted front and back and left relatively, the alignment camera can move to the positions above film alignment marks of different positions to detect, the alignment camera judges whether the upper film and the lower film are aligned according to the matching condition of the dot alignment marks and the circular ring alignment marks, the positions of the upper film and the lower film are finely adjusted through the first alignment assembly and the second alignment assembly respectively, and the alignment condition is corrected.

In order to better understand the above technical solutions, the following detailed description will refer to the accompanying drawings and specific embodiments.

Referring to fig. 1 to 9, a preferred embodiment of the present utility model.

A film alignment device of an inner layer exposure machine comprises:

the camera moving assembly 1 comprises a frame 11, a guide rail 12, an alignment camera 13, a first sliding seat 14 and a second sliding seat 15, wherein the guide rail 12 is fixedly connected with the frame 11, the first sliding seat 14 is in left-right sliding connection with the guide rail 12, the second sliding seat 15 is in front-back sliding connection with the first sliding seat 14, the alignment camera 13 is fixedly connected with the second sliding seat 15, and a detection port of the alignment camera 13 is arranged downwards;

the upper film bearing assembly 2 comprises a first bearing plate 21 and an upper film 22, wherein a first light transmission groove is formed in the first bearing plate 21, the upper film 22 is installed in the first light transmission groove, the upper film 22 is provided with dot alignment marks 23, the upper film 22 is arranged below the alignment camera 13, and the first bearing plate 21 is connected with the frame 11 through a first positioning assembly 5;

the lower film bearing assembly 3 comprises a second bearing plate 31 and a lower film 32, the second bearing plate 31 is provided with a second light transmission groove, the lower film 32 is installed in the second light transmission groove, the lower film 32 is provided with a circular ring alignment mark 33, the lower film 32 is arranged below the upper film 22, and the second bearing plate 31 is connected with the frame 11 through a second positioning assembly 6.

The PCB jointed board 4 is positioned between the upper film 22 and the lower film 32, in order to adapt to the exposure of the PCB jointed boards 4 with different sizes, the upper film 22 and the lower film 32 with different sizes are replaced, the positions of the dot alignment marks 23 of the upper film 22 after replacement are changed, the positions of the ring alignment marks 33 of the lower film after replacement are correspondingly changed, the alignment camera 13 of the camera moving assembly 1 can be adjusted left and right and front and back, and the alignment camera 13 can be moved to the positions above the film alignment marks with different positions to detect; when the alignment camera 13 detects that the dot alignment mark 23 and the circular ring alignment mark 33 are at the same center, the upper film 22 and the lower film 32 are successfully aligned, at this time, the patterns of the upper film 32 and the lower film 32 are respectively precisely printed on the upper surface and the lower surface of the PCB jointed board 4 through exposure, and when the alignment camera 13 detects that the dot alignment mark 23 and the circular ring alignment mark 33 are not at the same center, namely, the upper film 22 and the lower film 32 are not successfully aligned, the exposure work is not performed.

One of the reasons why the alignment of the upper film 22 and the lower film 32 is unsuccessful is that deviation is generated when the film is manually placed, and the correction can be performed by adjusting the position of the film; the second reason for unsuccessful alignment of the upper film 22 with the lower film 32 is that the two films are not used for the same PCB panel 4, and therefore the films need to be inspected and replaced. The reason why the upper film 22 and the lower film 32 are not aligned successfully is that the alignment marks of the upper film 32 and the lower film 32 are blocked by the PCB jointed board 4, so that the position relation between the upper film 32 and the lower film 32 and the PCB jointed board 4 needs to be adjusted.

The guide rails 12 are two and arranged in parallel, two ends of each guide rail 12 are provided with one alignment camera 13, four corners of the upper film 22 are provided with the dot alignment marks 23, and four corners of the lower film 32 are provided with the ring alignment marks 33. The alignment camera 13 detects the dot alignment marks 23 and the ring alignment marks 33 in a one-to-one correspondence.

The camera moving assembly 1 further comprises an alignment indicator, and the alignment indicator is electrically connected with the alignment camera 13. When the alignment camera 13 detects that the dot alignment mark 23 and the ring alignment mark 33 are successfully aligned, the indicator lights green, and when the alignment camera 13 detects that the alignment is failed, the indicator lights red, so that the staff can grasp the alignment condition conveniently.

The first positioning assembly 5 and the second positioning assembly 6 have the same structure and comprise a first positioning motor 51, a first ball screw 52, a first positioning frame plate 53, a second positioning motor 54, a second ball screw 55 and a second positioning frame plate 56, wherein the first positioning frame plate 53 is transversely and slidably connected with the inside of the second positioning frame plate 56, the body of the first positioning motor 51 is fixedly connected with the second positioning frame plate 56, the output shaft of the first positioning motor 51 is connected with the first positioning frame plate 53 through the first ball screw 52, the second positioning frame plate 56 is longitudinally and slidably connected with the frame 11, the body of the second positioning motor 54 is fixedly connected with the frame 11, and the output shaft of the second positioning motor 54 is connected with the second positioning frame plate 56 through the second ball screw 55;

the first bearing plate 21 is fixedly connected with the first positioning frame plate 53 of the first positioning assembly 5, and the second bearing plate 31 is fixedly connected with the first positioning frame plate 53 of the second positioning assembly 6.

The control device of the exposure machine is electrically connected with the first positioning motor 51 and the second positioning motor 54, and controls the steering and the rotating speed of the first positioning motor 51 and the second positioning motor 54, so that the positions of the first positioning frame plate 53 and the second positioning frame plate 56 on the plane are changed, the position adjustment of the first bearing plate 21 and the second bearing plate 31 is realized, and the positions of the upper film 22 and the lower film 32 are finely adjusted. When the PCB jointed board 4 shields the alignment marks of the upper film sheet 32 and the lower film sheet 32, the control device keeps the position of the upper film sheet 22 unchanged, and the position of the lower film sheet 32 is regulated by the second positioning component 6; or the position of the lower film 32 is kept unchanged, and the position of the upper film 22 is adjusted through the first positioning component 5; the four alignment cameras 13 respectively detect that the four dot alignment marks 23 and the ring alignment marks 33 are successfully aligned, and the alignment is stopped.

The working principle of the positioning motor and the ball screw is suitable for driving the first slide seat 14, the second slide seat 15 and the frame 11 of the camera moving assembly 1.

In another embodiment of the present utility model, the alignment marks set on the upper film 22 are circular rings, and the alignment marks set on the lower film 32 are dots.

The dot alignment marks 23 are divided into a first size dot alignment mark 231 and a second size dot alignment mark 232, and the second size dot alignment mark 232 is located horizontally outside the first size dot alignment mark 231;

the ring alignment marks 33 are divided into first-size ring alignment marks and second-size ring alignment marks, and the second-size ring alignment marks are located on the horizontal outer sides of the first-size ring alignment marks.

A PCB jointed board 4 is arranged between the upper film 22 and the lower film 32;

when the left and right boundaries of the PCB panel 4 are close to and do not block the first-size dot alignment marks 231, the alignment camera 13 detects the alignment of the first-size dot alignment marks 231 and the first-size ring alignment marks;

when the left and right boundaries of the PCB panel 4 are close to and do not block the second-size dot alignment marks 232, the alignment camera 13 detects the alignment of the second-size dot alignment marks 232 and the second-size ring alignment marks.

One film has two size alignment marks, so that one film can be used for exposing the PCB jointed boards 4 with two limit sizes, the cost of the film is saved, and the production efficiency is improved.

Referring to fig. 1, the four dot alignment marks 23 of the upper film 22 have dimensions l1=400 mm, l2=640 mm, l3=395 mm; the alignment marks of the PCB jointed board 4 need to be avoided, and in consideration of the cutting tolerance and the manual board placement error, the limit size of the PCB jointed board 4 is A1=380 mm and A2=648 mm.

Referring to fig. 7 to 9, the first-size dot alignment marks 23 of the upper film 22 have a size l1=400 mm, l2=640 mm, l3=395 mm; the first size circular ring alignment marks of the lower film 32 are the same size as the first size dot alignment marks 231 of the upper film 22. The limiting dimensions of the PCB panel 4 were a1=380 mm, a2=648 mm. Before exposing the PCB panel 4 of this size, the alignment camera 13 is moved over the first size dot alignment mark 231 and detects the alignment of the first size dot alignment mark 231 with the first size ring alignment mark.

The second size dot alignment marks 232 are l4=548mm, l5=640 mm, l6=555 mm; the second size circular ring alignment marks of the lower film 32 are of a size consistent with the second size dot alignment marks 232 of the upper film 22. Considering the cutting tolerance and the manual board placement error, the limit size of the PCB panel 4 is a1=530 mm and a2=648 mm. At this time, the PCB panel 4 shields the first size dot alignment mark 231 and the first size ring alignment mark, but avoids the second size dot alignment mark 232 and the second size ring alignment mark; before exposing the PCB panel 4 of this size, the alignment camera 13 is moved over the second size dot alignment marks 232 and detects the alignment of the second size dot alignment marks 232 with the second size ring alignment marks.

While specific embodiments of the utility model have been described above, it will be appreciated by those skilled in the art that the specific embodiments described are illustrative only and not intended to limit the scope of the utility model, and that equivalent modifications and variations of the utility model in light of the spirit of the utility model will be covered by the claims of the present utility model.

Claims (7)

1. Film alignment device of inlayer exposure machine, its characterized in that includes:

the camera moving assembly comprises a frame, a guide rail, an alignment camera, a first sliding seat and a second sliding seat, wherein the guide rail is fixedly connected with the frame, the first sliding seat is in left-right sliding connection with the guide rail, the second sliding seat is in front-back sliding connection with the first sliding seat, the alignment camera is fixedly connected with the second sliding seat, and a detection opening of the alignment camera is arranged downwards;

the upper film bearing assembly comprises a first bearing plate and an upper film, wherein the first bearing plate is provided with a first light transmission groove, the upper film is installed in the first light transmission groove, the upper film is provided with dot alignment marks, the upper film is arranged below the alignment camera, and the first bearing plate is connected with the frame through a first positioning assembly;

the lower film bearing assembly comprises a second bearing plate and a lower film, wherein a second light transmission groove is formed in the second bearing plate, the lower film is installed in the second light transmission groove, a circular ring alignment mark is arranged on the lower film, the lower film is arranged below the upper film, and the second bearing plate is connected with the frame through a second positioning assembly.

2. The film alignment device of an inner layer exposure machine according to claim 1, wherein two guide rails are arranged in parallel, two alignment cameras are arranged at two ends of each guide rail, the four corners of the upper film are provided with the dot alignment marks, and the four corners of the lower film are provided with the ring alignment marks.

3. The film alignment device of claim 1, wherein the camera moving assembly further comprises an alignment indicator, the alignment indicator being electrically connected to the alignment camera.

4. The film alignment device of the inner layer exposure machine according to claim 1, wherein the first positioning assembly and the second positioning assembly have the same structure and comprise a first positioning motor, a first ball screw, a first positioning frame plate, a second positioning motor, a second ball screw and a second positioning frame plate, the first positioning frame plate is transversely and slidingly connected with the inside of the second positioning frame plate, a machine body of the first positioning motor is fixedly connected with the second positioning frame plate, an output shaft of the first positioning motor is connected with the first positioning frame plate through the first ball screw, the second positioning frame plate is longitudinally and slidingly connected with the machine frame, the machine body of the second positioning motor is fixedly connected with the machine frame, and an output shaft of the second positioning motor is connected with the second positioning frame plate through the second ball screw;

the first bearing plate is fixedly connected with the first positioning frame plate of the first positioning assembly, and the second bearing plate is fixedly connected with the first positioning frame plate of the second positioning assembly.

5. The film alignment device of claim 1, wherein the alignment marks provided by the upper film are circular rings and the alignment marks provided by the lower film are dots.

6. The film alignment device of claim 2, wherein the dot alignment marks are a first size dot alignment mark and a second size dot alignment mark, the second size dot alignment mark being located horizontally outside the first size dot alignment mark;

the ring alignment marks are divided into a first-size ring alignment mark and a second-size ring alignment mark, and the second-size ring alignment mark is positioned on the horizontal outer side of the first-size ring alignment mark.

7. The film alignment device of the inner layer exposure machine of claim 6, wherein a PCB panel is arranged between the upper film and the lower film;

when the left and right boundaries of the PCB jointed board are close to and do not shade the first size dot alignment marks, the alignment camera detects the alignment condition of the first size dot alignment marks and the first size circular ring alignment marks;

when the left and right boundaries of the PCB jointed board are close to and do not shade the second-size dot alignment marks, the alignment camera detects the alignment condition of the second-size dot alignment marks and the second-size circular ring alignment marks.