Film positioning device for circuit board exposure
By setting the positioning angle lines on the film and aligning with the reference bar, the problems of occlusion and skewness during film positioning are solved, and the operation efficiency and production quality are improved.
Patent Information
- Application Number
- CN202422316137.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-23
- Publication Date
- 2025-08-12
- Estimated Expiration
- 2034-09-23
AI Technical Summary
In the prior art, when manually positioning the film, it is easy to block the corners of the pattern area or make it skew, resulting in a decrease in production quality of circuit board pattern transfer and low operation efficiency.
Set the positioning angle lines in the four corners of Film, the positioning angle lines are parallel to the corners of the pattern area and are distributed evenly at intervals. They are aligned with the positioning angle lines through horizontal and vertical reference strips to avoid occlusion and skewness, and are fixed with tape.
The efficiency of manual positioning of film is improved, the occlusion and skew of the corners of the pattern area is avoided, and the production quality of circuit board pattern transfer is improved.
Smart Images
Figure CN223219275U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of circuit board exposure, in particular to a film positioning device for circuit board exposure. Background Art
[0002] Circuit boards, also known as PCBs, are important electronic components and serve as the support for electronic devices. The exposure process for circuit boards involves presetting the circuit pattern on film. The substrate to be exposed is then placed under the exposure table of an exposure machine. A photosensitive film is then applied to the substrate surface. The film is then placed on the exposure table and exposed using an ultraviolet light source. The ultraviolet light passes through the transparent portion of the film and hits the film, while the black portion of the film blocks the ultraviolet light. After exposure, a developer is used to remove the unexposed film, thereby transferring the circuit pattern from the film to the substrate.
[0003] See Figure 1 The circuit pattern of the film 2 is composed of multiple small patterns arranged at intervals, and the pattern area corner line 21 is used to identify the effective area of the small pattern. After the circuit pattern is transferred to the substrate, the substrate undergoes a subsequent process and is cut into multiple small substrates, which correspond one to one with the small patterns. Before exposure, the film needs to be positioned. The film is placed on the exposure table of the exposure machine. A horizontal reference pressure strip is pressed against the horizontal edge of the film, and a vertical reference pressure strip is pressed against the vertical edge of the film to fix the position of the film. The horizontal and vertical reference pressure strips are then affixed to the exposure table with tape. However, both the horizontal and vertical reference pressure strips must not block the pattern area corner lines.
[0004] See Figure 2 During the manual positioning operation of the film and the reference bead, when the pattern area corner line 21 is too close to the horizontal reference bead 3 or the vertical reference bead 4, the pattern area corner line 21 of the film is easily blocked. After exposure and development, the pattern area corner line at the corresponding position of the substrate will be blurred or even lost. In the subsequent process of substrate cutting, the circuit pattern is easily cut, which reduces the production quality of the circuit board pattern transfer.
[0005] See Figure 3In the process of manually positioning the film and the reference bead, the pattern area corner line 21 of the film 2 is easily skewed, causing the parallelism of the horizontal side line of the horizontal reference bead 3 and the horizontal line segment of the pattern area corner line 21 to exceed the specified range, or the parallelism of the vertical side line of the vertical reference bead 3 and the vertical line segment of the pattern area corner line 21 to exceed the specified range. The positioning accuracy is low, causing the position of the pattern area corner line of the substrate after the pattern transfer to be skewed. During the subsequent substrate cutting process, the circuit pattern is easily cut, reducing the production quality of the circuit board pattern transfer. Usually, the staff has to spend more time adjusting the film, observing the relative positions of the horizontal reference bead, the vertical reference bead and the pattern area corner line to avoid skewness of the pattern area corner line and to ensure that the horizontal reference bead, the vertical reference bead and the pattern area corner line are in the specified parallelism. However, such operation is time-consuming and the efficiency of manual film positioning is low.
[0006] Therefore, how to improve the efficiency of manual film positioning, avoid blocking the corner lines of the pattern area, and avoid the corner lines of the pattern area from being skewed is a technical problem that needs to be solved urgently in this field. Utility Model Content
[0007] The technical problem to be solved by the present invention is to provide a film positioning device for circuit board exposure, which improves the efficiency of manual film positioning, avoids blocking the corner lines of the pattern area, and avoids the corner lines of the pattern area from being skewed.
[0008] The utility model is implemented as follows: a film positioning device for circuit board exposure, comprising:
[0009] Exposure table, film, horizontal reference bead, vertical reference bead and tape;
[0010] At the four corners of the film, pattern area corner lines and positioning corner lines are provided. The positioning corner lines are parallel to the pattern area corner lines. A plurality of positioning corner lines are evenly spaced and distributed between the pattern area corner lines and the edge lines of the film.
[0011] The film is placed on the exposure table, the transverse reference bead is pressed on the transverse edge of the film, the longitudinal reference bead is pressed on the longitudinal edge of the film, and the corner line of the pattern area is exposed, the transverse reference bead is aligned with the transverse line segment of the positioning angle line, and the longitudinal reference bead is aligned with the longitudinal line segment of the positioning angle line, and the transverse reference bead and the longitudinal reference bead are both adhered to the exposure table by the tape.
[0012] Furthermore, the offset between two adjacent positioning angle lines is one millimeter.
[0013] Furthermore, there are three positioning angle lines.
[0014] Furthermore, each positioning angle line is provided with a serial number.
[0015] Furthermore, the exposure table is a glass plate.
[0016] Compared with the background technology, the advantage of the present invention is that: when the staff manually adjusts the position of the film, they observe the relative positions of the horizontal reference pressure strip, the longitudinal reference pressure strip and the positioning angle line in real time, so that the horizontal side line of the horizontal reference pressure strip is aligned with the horizontal line segment of the positioning angle line, and the longitudinal side line of the longitudinal reference pressure strip is aligned with the longitudinal line segment of the positioning angle line. Since the positioning angle line is parallel to the corresponding pattern area angle line, the pattern area angle line is avoided from being blocked, and the pattern area angle line is avoided from being skewed. The horizontal reference pressure strip and the longitudinal reference pressure strip are both in the specified parallelism with the pattern area angle line, which improves the efficiency of manual positioning of the film and improves the production quality of circuit board pattern transfer. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] The present invention will be further described below with reference to the accompanying drawings and embodiments.
[0018] Figure 1 It is a schematic diagram of the distribution of the circuit pattern of the film in the background art.
[0019] Figure 2 This is a schematic diagram of a horizontal reference bead blocking the corner line of the pattern area of the film in the background art.
[0020] Figure 3 This is a schematic diagram of the skewed corner lines of the pattern area of the film in the background art.
[0021] Figure 4 The utility model is a structural schematic diagram of a film positioning device for circuit board exposure.
[0022] Figure 5 It is a schematic diagram of the positions of the pattern area corner lines and the positioning corner lines in the embodiment of the present utility model.
[0023] Figure 6 This is a schematic diagram of the alignment of the reference pressure strip and the second positioning angle line in an embodiment of the present utility model.
[0024] Figure 7 It is a schematic diagram of the intersection of the edge line of the reference pressure strip and the positioning angle line in the embodiment of the present utility model.
[0025] Reference numerals: exposure table 1; film 2; pattern area corner line 21; positioning corner line 22; film edge line 23; transverse reference strip 3; longitudinal substrate strip 4; adhesive tape 5. DETAILED DESCRIPTION
[0026] An embodiment of the utility model provides a film positioning device for circuit board exposure, which overcomes the shortcomings of the background technology in which workers manually perform positioning operations between the film and the reference pressure strip, which easily blocks the corner lines of the pattern area and easily causes the corner lines of the pattern area at the edge of the film to be skewed; it achieves the technical effect of improving the efficiency of manual positioning of the film, avoiding blocking the corner lines of the pattern area, and avoiding the skewness of the corner lines of the pattern area, thereby improving the production quality of the circuit board pattern transfer.
[0027] The overall idea of the technical solution of the embodiment of the utility model is as follows:
[0028] Pattern area corner lines and positioning angle lines are set at the four corners of the film. The positioning angle lines are parallel to the pattern area corner lines, that is, the positioning angle lines and the pattern area corner lines are both right angles, the longitudinal line segments of the positioning angle lines are parallel to the longitudinal line segments of the pattern area corner lines, and the transverse line segments of the positioning angle lines are parallel to the transverse line segments of the pattern area corner lines. Multiple positioning angle lines are evenly spaced between the pattern area corner lines and the edge lines of the film.
[0029] The staff placed the film on the exposure table of the exposure machine and manually adjusted the film's position, selecting one of the positioning angle lines as the alignment line so that the horizontal segment of the positioning angle line approaches the horizontal edge of the horizontal reference bead until they are aligned, and the vertical segment of the positioning angle line approaches the vertical edge of the vertical reference bead until they are aligned. The horizontal reference bead is pressed against the horizontal edge of the film, and the vertical reference bead is pressed against the vertical edge of the film. Since the pattern area corner lines are not too close to the horizontal or vertical reference bead, they are separated by the positioning angle lines, thus avoiding obstruction of the pattern area corner lines. When the staff observes that the horizontal edge of the horizontal reference bead intersects with the horizontal segment of the positioning angle line, or the vertical edge of the vertical reference bead intersects with the vertical segment of the positioning angle line, it indicates that the pattern area corner lines of the film are skewed. The staff continues to adjust the film position until the horizontal segment of the positioning angle line is aligned with the horizontal edge of the horizontal reference bead, and the vertical segment of the positioning angle line is aligned with the vertical edge of the vertical reference bead. Finally, use tape to affix the horizontal and vertical reference bead lines to the exposure table.
[0030] In order to better understand the above technical solution, the above technical solution will be described in detail below with reference to the accompanying drawings and specific implementation methods.
[0031] See Figures 1 to 7 , a preferred embodiment of the present utility model.
[0032] A film positioning device for circuit board exposure, comprising:
[0033] Exposure table 1, film 2, transverse reference bead 3, longitudinal reference bead 4 and tape 5;
[0034] At the four corners of the film 2, there are pattern area corner lines 21 and positioning corner lines 22. The positioning corner lines 22 are parallel to the pattern area corner lines 21. A plurality of positioning corner lines 22 are evenly spaced between the pattern area corner lines 21 and the edge lines 23 of the film.
[0035] The film 2 is placed on the exposure table 1, the transverse reference bead 3 is pressed on the transverse edge of the film 2, the longitudinal reference bead 4 is pressed on the longitudinal edge of the film 2, and the pattern area corner line 21 is exposed, the transverse reference bead 3 is aligned with the transverse line segment of the positioning angle line 22, the longitudinal reference bead 4 is aligned with the longitudinal line segment of the positioning angle line 22, and the transverse reference bead 3 and the longitudinal reference bead 4 are both adhered to the exposure table 1 by the tape 5.
[0036] When the staff manually adjusts the position of the film 2, they observe the relative positions of the horizontal reference pressure strip 3, the longitudinal reference pressure strip 4 and the positioning angle line 22 in real time, so that the horizontal side line of the horizontal reference pressure strip 3 is aligned with the horizontal line segment of the positioning angle line 22, and the longitudinal side line of the longitudinal reference pressure strip 4 is aligned with the longitudinal line segment of the positioning angle line 22. Since the positioning angle line 22 is parallel to the pattern area angle line 21, the pattern area angle line 21 is avoided from being blocked, and the pattern area angle line 21 is avoided from being skewed. The horizontal reference pressure strip 3 and the longitudinal reference pressure strip 4 are both in the specified parallelism with the pattern area angle line 21, which improves the efficiency of manual adjustment of the film position and improves the production quality of circuit board pattern transfer.
[0037] With the help of multiple positioning angle lines 22, the staff observes and compares the relative positions of the horizontal reference bead 3 and the longitudinal reference bead 4 with the positioning angle lines 22, and conveniently determines whether the pattern area angle line 21 is skewed.
[0038] The offset between two adjacent positioning angle lines is one millimeter.
[0039] Specifically, there are three positioning angle lines.
[0040] Each of the positioning angle lines is provided with a serial number. For example, the serial numbers of the three positioning angle lines are "one", "two", and "three" from the inside to the outside.
[0041] The exposure table 1 is a glass plate.
[0042] There are two transverse reference pressing strips 3 , which are used to press the upper edge and the lower edge of the film 2 respectively; there are two longitudinal reference pressing strips 4 , which are used to press the left edge and the right edge of the film 2 respectively.
[0043] The working method of the utility model is as follows: the staff places the film 2 on the exposure table 1 of the exposure machine, manually adjusts the position of the film 2, selects the second positioning angle line as the alignment line; aligns the horizontal line segment of the second positioning angle line with the horizontal edge line of the horizontal reference beading 3, and aligns the vertical line segment of the second positioning angle line with the vertical edge line of the vertical reference beading 4, and combines Figure 6 At this time, the horizontal reference bead 3 and the vertical reference bead 4 block the third positioning angle line, but expose the first positioning angle line and the pattern area angle line 21. Then, use tape 5 to stick the horizontal reference bead 3 and the vertical reference bead 4 to the exposure table 1. Finally, use an ultraviolet light source for exposure, and then use a developer for development to achieve the transfer of the circuit pattern of the film to the substrate of the circuit board. The pattern area angle line 21 of the film 2 is not too close to the horizontal reference bead 3 or the vertical reference bead 4, and is separated by the first positioning angle line and the second positioning angle line, so as to avoid blocking the pattern area angle line 21; the substrate has a complete pattern area angle line 21 and the first positioning angle line; because the third positioning angle line of the film 2 is blocked, the substrate does not have a third positioning angle line.
[0044] During the alignment process, when the second positioning angle line is too close to the horizontal reference bead 3 and the vertical reference bead 4, the second positioning angle line of the substrate will be blurred after the pattern is transferred, or even the substrate will not have the second positioning angle line. However, as long as the pattern area angle line 21 is complete, it will not affect the substrate cutting process in the subsequent process. When during the alignment process, when the second positioning angle line is not too close to the horizontal reference bead 3 and the vertical reference bead 4, the substrate still has a clear second positioning angle line after the pattern is transferred. In the substrate cutting process in the subsequent process, the area between the pattern area angle line 21 and the edge line of the substrate belongs to the cutting area; the small substrate obtained by cutting retains the pattern area angle line 21, but does not retain the first positioning angle line and the second positioning angle line.
[0045] During the alignment process, the staff observes whether the horizontal side line of the horizontal reference bead 3 intersects with the horizontal line segments of the three positioning angle lines 22, and whether the longitudinal side line of the longitudinal reference bead 4 intersects with the longitudinal line segments of the three positioning angle lines 22. Figure 7 When an intersection occurs, it means that the pattern area corner line 21 of the film 2 is skewed; the staff continues to adjust the film position until the second positioning angle line is aligned with the horizontal reference bead 3 and the vertical reference bead 4; so that the horizontal reference bead 3, the vertical reference bead 4 and the pattern area corner line 21 are in the specified parallelism, thereby improving the efficiency of manual film positioning and improving the production quality of circuit board pattern transfer.
[0046] Although the specific implementation methods of the present invention are described above, those skilled in the art should understand that the specific embodiments described are merely illustrative and are not intended to limit the scope of the present invention. Equivalent modifications and changes made by those skilled in the art in accordance with the spirit of the present invention should be included within the scope of protection of the claims of the present invention.
Claims
1. A film positioning device for circuit board exposure, characterized in that: include: Exposure table, film, horizontal reference bead, vertical reference bead and tape; At the four corners of the film, pattern area corner lines and positioning corner lines are provided. The positioning corner lines are parallel to the pattern area corner lines. A plurality of positioning corner lines are evenly spaced and distributed between the pattern area corner lines and the edge lines of the film. The film is placed on the exposure table, the transverse reference bead is pressed on the transverse edge of the film, the longitudinal reference bead is pressed on the longitudinal edge of the film, and the corner line of the pattern area is exposed, the transverse reference bead is aligned with the transverse line segment of the positioning angle line, and the longitudinal reference bead is aligned with the longitudinal line segment of the positioning angle line, and the transverse reference bead and the longitudinal reference bead are both adhered to the exposure table by the tape.
2. A film positioning device for circuit board exposure according to claim 1, characterized in that: The offset between two adjacent positioning angle lines is one millimeter.
3. The film positioning device for circuit board exposure according to claim 1, characterized in that: There are three positioning angle lines.
4. The film positioning device for circuit board exposure according to claim 1, characterized in that: Each of the positioning angle lines is provided with a serial number.
5. The film positioning device for circuit board exposure according to claim 1, characterized in that: The exposure table is a glass plate.