CN210491341U

CN210491341U - Alignment structure applied to exposure of inner-layer board core

Info

Publication number: CN210491341U
Application number: CN201920896889.4U
Authority: CN
Inventors: 曾祥福; 彭晓华; 贺仁虎; 潘勇良
Original assignee: HUIZHOU DAYA BAY MILLION SOURCES PCB CO LTD
Current assignee: HUIZHOU DAYA BAY MILLION SOURCES PCB CO LTD
Priority date: 2019-06-14
Filing date: 2019-06-14
Publication date: 2020-05-08
Anticipated expiration: 2029-06-14

Abstract

The utility model discloses an alignment structure applied to exposure of an inner plate core, which comprises a bottom layer film, an inner plate core and a top layer film which are sequentially overlapped, wherein the edges of the bottom layer film and the top layer film are respectively provided with a plurality of first targets and a plurality of second targets, and the first targets and the second targets respectively comprise an annular main body and four azimuth cylinders which are uniformly arranged outside the annular main body; when the bottom film and the top bottom film are aligned, the first target is located in the second target, and the four azimuth cylinders of the first target are in one-to-one correspondence with the four azimuth cylinders of the second target respectively. The utility model discloses in two negative are just to the time, first target is located in the second target, four position cylinders of first target respectively with four position cylinder one-to-ones of second target, when two negatives take place the skew, position cylinder contained angle and relative position judge skew angle and skew distance between the accessible observation two targets.

Description

Alignment structure applied to exposure of inner-layer board core

Technical Field

The utility model relates to a circuit board technical field, concretely relates to be applied to counterpoint structure of inlayer plate core exposure.

Background

When the inner layer of the PCB is processed, the inner layer core needs to be exposed, but the base plate of the inner layer core plate before being processed is not provided with a hole for positioning, so that the bottom plate cannot be directly positioned by the core plate, therefore, the inner layer core plate adopts a sandwich type production method in production, the top layer bottom plate, the inner layer core plate and the bottom layer bottom plate are sequentially overlapped before being exposed, and then the top layer bottom plate and the bottom layer bottom plate are exposed after being aligned. In the production process, the superposition precision between two layers of negative films directly influences the alignment degree between the layers of the PCB, and the whole board or the whole batch of negative films can be scrapped if layer deviation occurs.

In the prior art, the alignment mode between the top layer negative film and the bottom layer negative film usually adopts the alignment of two large and small concentric circles positioned at the center of the wide edge, specifically, the top layer negative film and the bottom layer negative film are photographed by using a CCD (charge coupled device) and the concentric distance between the upper circle and the lower circle is adopted, and the alignment is defaulted and the exposure is carried out when the error range is set. In the process, when the top layer bottom sheet and the bottom layer bottom sheet deviate, two concentric circles on one side can be aligned generally, and a concentric circle on the other side can deviate obviously, so that an operator can know whether the two bottom sheets deviate or not.

Disclosure of Invention

In order to solve the problem that the degree of skew is undefined and leads to production efficiency to reduce between above-mentioned exposure in-process top layer film and the bottom film, the utility model provides a production efficiency is high, counterpoint accurate and be convenient for position control be applied to the counterpoint structure of inner panel core exposure.

The utility model discloses a be applied to counterpoint structure of inlayer core exposure, including bottom film, inlayer core and the top layer film of coincide in proper order, be provided with a plurality of first targets on the edge of bottom film, be provided with a plurality of second targets that correspond with a plurality of first targets on the edge of top layer film, first target all includes with the second target: the device comprises an annular main body and four azimuth cylinders uniformly arranged on the outer side of the annular main body; when the bottom film and the top bottom film are aligned, the first target is located in the second target, and the four azimuth cylinders of the first target are respectively in one-to-one correspondence with the four azimuth cylinders of the second target and are located on the same straight line.

According to an embodiment of the present invention, the number of the first targets and the second targets is four groups, and the four groups of the first targets and the second targets are respectively located at four corners of the bottom layer bottom sheet and the top layer bottom sheet.

According to the utility model discloses an embodiment, the annular main part interval of the annular main part of first target and second target is 0.05~0.1 mm.

According to an embodiment of the present invention, the first target and the second target are designed in red and green respectively.

According to the utility model discloses an embodiment, four counterpoint grooves that correspond with four position cylinders of first target are seted up to the annular main part inboard of second target, and the bottom film is just to the time with the top layer film, and four position cylinders of first target block respectively locate four counterpoint inslots.

The utility model discloses a be applied to counterpoint structure of inner panel core exposure, it all is provided with by annular main part and evenly sets up in four position cylinders in the annular main part outside at bottom film and top layer film and constitutes the target, and the bottom film is just right to the time with the top layer film, and first target is located in the second target, four position cylinders of first target respectively with four position cylinder one-to-ones of second target and lie in same straight line, when taking place the skew between bottom film and the top layer film, operating personnel accessible is observed between two targets skew angle and skew distance between position cylinder contained angle and the relative position to two films and is judged to shorten the debugging time of operating personnel when taking place the skew, effectively improve production efficiency.

Drawings

Fig. 1 is a schematic diagram of the hierarchical structure of the alignment structure of the present invention.

Fig. 2 is a schematic view of the orientation of the first target and the second target according to the present invention.

FIG. 3 is a schematic diagram of the structures of the first target and the second target in one embodiment.

Fig. 4 is a schematic diagram of the offset state of the first target and the second target according to the present invention.

FIG. 5 is a schematic structural diagram of a first target and a second target according to another embodiment.

Detailed Description

The alignment structure applied to the exposure of the inner core will be described in detail with reference to the following embodiments and accompanying drawings.

Please refer to fig. 1 to 4, which are a schematic diagram of a hierarchical structure of an alignment structure, an orientation of a first target and a second target, a schematic diagram of a structure of the first target and the second target, and a schematic diagram of an offset state of the first target and the second target according to an embodiment of the present invention.

The utility model provides a be applied to counterpoint structure of inlayer board core exposure mainly includes bottom film 1, inlayer board core 2 and top layer film 3 of coincide in proper order, the utility model discloses a counterpoint structure mainly used is counterpointed between bottom film 1 and the top layer film 3 to improve the precision of inlayer board core 2 in the exposure technological process. The bottom layer negative film 1 is provided with a plurality of first targets 11 on the edge, the top layer negative film 3 is provided with a plurality of second targets 31 corresponding to the plurality of first targets 11 on the edge, each of the first targets 11 and the second targets 31 includes an annular main body and four orientation cylinders uniformly arranged outside the annular main body, in other words, each of the first targets 11 includes an annular main body 111 and four orientation cylinders 112, and each of the second targets 31 also includes an annular main body 311 and four orientation cylinders 312. When the bottom layer plate 1 and the top layer plate 3 are aligned, that is, the bottom layer plate 1 and the top layer plate 3 are aligned correctly and have a composite production standard, the first target 11 is located in the second target 31, the annular main body 111 and the annular main body 312 are concentric, and the four orientation cylinders 112 of the first target 11 are respectively in one-to-one correspondence with the four orientation cylinders 312 of the second target 31 and are located on the same straight line.

When the CCD is utilized to align the bottom negative film 1 and the top negative film 3, the CCD aligns each group of the first target 11 and the second target 31 between the bottom negative film 1 and the top negative film 3 and analyzes the concentric distance of the annular main bodies of the two targets, when the alignment is within the set error range, the exposure is carried out, otherwise, the exposure is rejected, when the exposure is rejected, an operator can quickly prejudge the offset angle and the offset distance between the two negative films by observing the included angle and the relative position of the azimuth cylinder between the two targets through the pictures obtained by the CCD, and therefore, the production process is quickly analyzed and adjusted.

In one embodiment, the number of the first targets 11 and the second targets 31 is four, in other words, the number of the first targets 11 and the second targets 31 is four and corresponds to one. The four groups of first targets 11 and the four groups of second targets 31 are respectively positioned at the four corners of the bottom negative film 1 and the top negative film 3, so that when one negative film has single-angle expansion and contraction, the negative film can be found and rejected in time, defective products caused by expansion and contraction are effectively avoided, and the production quality is effectively improved.

In an embodiment, the distance between the annular body 111 of the first target 11 and the annular body 311 of the second target 31 is 0.05-0.1 mm, so that the distance between the two targets is adapted to the detection standard of a commercial CCD, and the stability of the alignment process is ensured.

In an embodiment, the first target 111 and the second target 311 are designed in red and green respectively, in other words, the first target 111 is designed in red overall, and the second target 311 is designed in green overall, so that the color system of the two targets has a large difference, which is convenient for the CCD to distinguish and grab, thereby ensuring the stability of the CCD alignment, and simultaneously, the operator can quickly predict the relative offset displacement and the offset angle of the two targets.

In another embodiment, please refer to fig. 5, which is a schematic structural diagram of a first target and a second target in another embodiment, four alignment grooves 313 corresponding to the four orientation cylinders 112 of the first target 11 are formed in the inner side of the annular main body 311 of the second target 31, when the bottom layer negative plate 1 and the top layer negative plate 3 are aligned, the four orientation cylinders 112 of the first target 11 are respectively clamped in the four alignment grooves 313, and by the cooperation between the alignment grooves 313 and the orientation cylinders 112, the rate of pre-judging the alignment condition between the two targets by the operator is further increased, and the production efficiency is further increased.

To sum up, the utility model discloses a be applied to counterpoint structure of inner panel core exposure, it all is provided with by annular main part and evenly sets up in four position cylinders in the annular main part outside at bottom film and top layer film and constitutes the target, and the bottom film is just to the time with the top layer film, and first target is located in the second target, four position cylinders of first target respectively with four position cylinder one-to-ones of second target and lie in same straight line, when taking place the skew between bottom film and the top layer film, the operation personnel accessible is observed between two targets skew angle and skew distance between position cylinder contained angle and the relative position to two films and is judged to shorten the debugging time of operation personnel when taking place the skew, effectively improves production efficiency.

In the description of the present invention, it is to be understood that the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implying any number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically limited otherwise.

While the invention has been described in conjunction with the specific embodiments set forth above, it is evident that many alternatives, modifications, and variations will be apparent to those skilled in the art in light of the foregoing description. Accordingly, it is intended to embrace all such alternatives, modifications, and variations that fall within the spirit and scope of the appended claims.

Claims

1. An alignment structure applied to exposure of an inner-layer board core comprises: bottom film, inlayer core plate and the top layer film of coincide in proper order, its characterized in that, be provided with a plurality of first targets on the edge of bottom film, be provided with on the edge of top layer film with a plurality of second targets that first target corresponds, first target all includes with the second target: the device comprises an annular main body and four azimuth cylinders uniformly arranged on the outer side of the annular main body; when the bottom layer negative film and the top layer negative film are aligned, the first target is located in the second target, and the four azimuth cylinders of the first target are respectively in one-to-one correspondence with the four azimuth cylinders of the second target and are located on the same straight line.

2. The alignment structure applied to exposure of inner core plate according to claim 1, wherein the number of the first targets and the second targets is four, and four sets of the first targets and the second targets are respectively located at four corners of the bottom film and the top film.

3. The alignment structure applied to exposure of the inner core plate as claimed in claim 1, wherein the distance between the annular body of the first target and the annular body of the second target is 0.05-0.1 mm.

4. The alignment structure applied to exposure of inner layer core according to claim 2, wherein the first target and the second target are designed in red and green colors, respectively.

5. The alignment structure applied to exposure of the inner core, as set forth in any one of claims 1 to 4, wherein the annular main body of the second target has four alignment grooves formed on an inner side thereof corresponding to the four orientation cylinders of the first target, and the four orientation cylinders of the first target are respectively engaged with the four alignment grooves.