Ejector pin cap structure and ejector pin device
By combining the first and second ejector caps, the problem of blue film tearing during the lifting process is solved, achieving effective chip separation and applicability.
Patent Information
- Application Number
- CN202520172149.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-24
- Publication Date
- 2026-01-27
- Estimated Expiration
- 2035-01-24
AI Technical Summary
In existing technologies, the ejector cap is prone to adsorbing the blue film during the lifting process, causing the blue film to tear and making it impossible to effectively separate the chip.
The device employs a combination structure of a first ejector cap and a second ejector cap. The second ejector cap is detachably mounted on the first ejector cap. The second ejector cap blocks the ejector pin holes that have not been penetrated, preventing the blue film from adsorbing. Furthermore, the second ejector cap of different specifications can be replaced according to the chip size.
This effectively prevents blue film tearing, ensures chip lifting and separation, and improves applicability and reliability.
Smart Images
Figure CN223844266U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of surface mount packaging technology, and more specifically, to a pin cap structure and a pin device. Background Technology
[0002] With the rapid development of the semiconductor industry, surface mount packaging equipment commonly uses a method of lifting the blue film using ejector pins to separate the chip from the blue film. This involves using ejector pins on the ejector cap to lift the blue film and the chip, and then using a suction head to remove the chip, thus separating the chip from the blue film. However, to accommodate chips of various sizes, this structure typically employs a multi-hole design, where some pins do not extend beyond the cap. Therefore, once the blue film is lifted, the ejector pin holes around the traditional cap have a suction effect, which can trap the blue film, potentially causing it to tear and preventing proper chip lifting and separation. Utility Model Content
[0003] The purpose of this invention is to provide a pin cap structure and a pin device that can effectively prevent the adsorption of the blue film during the lifting process, ensuring the lifting and separation of the chip and preventing the blue film from tearing.
[0004] The embodiments of this utility model can be implemented as follows:
[0005] In a first aspect, the present invention provides a ejector cap structure, including a first ejector cap and a second ejector cap. The first ejector cap is configured to be mounted on a machine tool, and the first ejector cap is provided with a plurality of first ejector holes. A portion of the plurality of first ejector holes is configured to allow ejector pins on the machine tool to pass through. The second ejector cap is detachably mounted on the first ejector cap, and at least one second ejector hole is provided in the middle of the second ejector cap. The second ejector hole corresponds to the first ejector hole through which the ejector pin passes, so that the ejector pin passes through the first ejector hole and the second ejector hole in sequence. The second ejector cap is also configured to block the first ejector hole that does not correspond to the second ejector hole.
[0006] In an optional embodiment, there are multiple second pin holes, which are rectangularly distributed at the center of the second pin cap, and the multiple second pin holes are configured to correspond to the edge of the chip.
[0007] In an optional embodiment, the plurality of first pin holes are arranged radially in multiple lines, wherein some of the first pin holes are respectively connected to the plurality of second pin holes.
[0008] In an optional embodiment, both the first ejector cap and the second ejector cap are circular, and the first ejector cap and the second ejector cap have the same diameter.
[0009] In an optional embodiment, the top edge of the first ejector cap is provided with a stepped groove, and the edge of the second ejector cap is provided with a raised ring. The raised ring is correspondingly fitted in the stepped groove so that the second ejector cap is positioned and installed on the first ejector cap.
[0010] In an optional embodiment, a raised ring is provided on the top edge of the first ejector cap, and a stepped groove is provided on the edge of the first ejector cap. The raised ring is correspondingly fitted into the stepped groove so that the second ejector cap is positioned and installed on the first ejector cap.
[0011] In an optional embodiment, the bottom side of the first ejector cap is further provided with an assembly groove, which communicates with a plurality of first ejector holes and is configured to correspond and cooperate with a boss on the machine base.
[0012] In an optional embodiment, the bottom side of the second ejector cap is further provided with a plurality of internal hexagonal grooves, the depth of which is less than the thickness of the second ejector cap.
[0013] In an optional embodiment, there are 6 internal hexagonal recesses, which are evenly distributed along the same circumference, and the sizes of the 6 internal hexagonal recesses are different from each other.
[0014] Secondly, the present invention provides a pin device, including a machine base and a pin cap structure as described in any of the foregoing embodiments. A pin is provided on the machine base, a first pin cap is mounted on the machine base, a second pin cap is configured to carry a blue film with a chip, and the pin is configured to pass through the first pin hole and the second pin hole in sequence and abut against the blue film and the chip.
[0015] The beneficial effects of the ejector cap structure and ejector device provided in this embodiment of the utility model include:
[0016] The ejector cap structure and ejector device provided in this embodiment of the invention employ a structure in which a first ejector cap and a second ejector cap cooperate with each other. The first ejector cap is mounted on the machine base and has multiple first ejector holes, some of which are for ejector pins to pass through. The second ejector cap is detachably mounted on the first ejector cap and has at least one second ejector hole in its center, corresponding to the first ejector holes through which ejector pins pass. This allows ejector pins to pass through the first and second ejector holes sequentially. The second ejector cap is also configured to block the remaining first ejector holes. Compared to the prior art, this invention uses the second ejector cap to block ejector holes through which no ejector pins have passed, preventing the remaining ejector holes from adsorbing the blue film when the ejector pin ejects it, thus ensuring chip lifting and separation and preventing blue film tearing. Furthermore, the second ejector cap is detachable, allowing for the installation of second ejector caps with different second ejector hole specifications according to different chip sizes, ensuring its applicability. Attached Figure Description
[0017] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.
[0018] Figure 1 An exploded view of the pin cap structure is provided for this embodiment;
[0019] Figure 2 for Figure 1 A schematic diagram of the structure of the first thimble cap;
[0020] Figure 3 for Figure 1 A schematic diagram of the structure of the second thimble cap;
[0021] Figure 4 This embodiment provides an assembly diagram of the ejector cap structure;
[0022] Figure 5 A schematic diagram of the pin cap structure is provided for this embodiment.
[0023] Icons: 100 - Ejector cap structure; 110 - First ejector cap; 111 - First ejector hole; 113 - Step groove; 115 - Assembly groove; 130 - Second ejector cap; 131 - Second ejector hole; 133 - Protruding ring; 135 - Internal hexagonal groove; 200 - Ejector pin; 210 - Blue film; 230 - Chip. Detailed Implementation
[0024] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.
[0025] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.
[0026] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.
[0027] In the description of this utility model, it should be noted that if terms such as "upper," "lower," "inner," or "outer" are used to indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the utility model product is usually placed during use, they are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.
[0028] Furthermore, the terms "first" and "second" are used only to distinguish descriptions and should not be interpreted as indicating or implying relative importance.
[0029] It should be noted that, where there is no conflict, the features in the embodiments of this utility model can be combined with each other.
[0030] See Figures 1 to 5 This utility model embodiment provides a pin cap structure 100, which can effectively prevent the adsorption of the blue film 210 during the lifting process, ensure the lifting and separation of the chip 230, and prevent the blue film 210 from tearing.
[0031] The ejector cap structure 100 provided in this embodiment of the utility model includes a first ejector cap 110 and a second ejector cap 130. The first ejector cap 110 is configured to be mounted on a machine base and has a plurality of first ejector holes 111. A portion of the plurality of first ejector holes 111 is configured to allow ejector pins 200 on the machine base to pass through. The second ejector cap 130 is detachably mounted on the first ejector cap 110 and has at least one second ejector hole 131 in the middle. The second ejector hole 131 corresponds to the first ejector hole 111 through which the ejector pin 200 passes, so that the ejector pin 200 passes through the first ejector hole 111 and the second ejector hole 131 in sequence. The second ejector cap 130 is also configured to block the first ejector hole 111 that does not correspond to the second ejector hole 131.
[0032] In this embodiment, the first ejector cap 110 can be fixedly mounted on the machine base, on which ejector pins 200 are provided. The second ejector cap 130 is detachably mounted on the first ejector cap 110, with the second ejector hole 131 on the second ejector cap 130 corresponding to a portion of the first ejector hole 111 on the first ejector cap 110. The top surface of the second ejector cap 130 is used to support the blue film 210 with the chip 230. With this configuration, the ejector pins 200 on the machine base can rise upwards, passing sequentially through the first ejector hole 111 and the second ejector hole 131, and corresponding to the position of the chip 230 to lift the blue film 210, causing the chip 230 and the blue film 210 to rise upwards. Due to the pulling effect of the edges of the blue film 210, the edges of the chip 230 can separate from the blue film 210. Then, an adsorption head is used to remove the chip 230, completing the separation of the chip 230 from the blue film 210. During the lifting process, the second ejector cap 130 blocks the ejector pin 200 holes through which the ejector pin 200 has not passed, preventing the remaining ejector pin 200 holes from adhering to the blue film 210 when the ejector pin 200 pushes it out. This ensures the lifting and separation of the chip 230 and prevents the blue film 210 from tearing. Simultaneously, the second ejector cap 130 features a detachable design, allowing for the installation of second ejector caps 130 with different second ejector pin hole specifications according to different chip 230 sizes, ensuring its applicability.
[0033] In some embodiments, there are multiple second pin holes 131, which are rectangularly distributed at the center of the second pin cap 130 and configured to correspond to the edge of the chip 230. Preferably, there are four second pin holes 131 arranged in a rectangular pattern, which can be designed according to the size of the chip 230. Furthermore, multiple second pin caps 130 can be designed, each with different distribution specifications of the second pin holes 131, thereby allowing for the selection of a suitable second pin cap 130 based on different chip sizes, thus improving applicability.
[0034] In some embodiments, the plurality of first pin holes 111 are arranged radially in multiple lines, wherein some of the first pin holes 111 are respectively connected to the plurality of second pin holes 131. Specifically, the plurality of first pin holes 111 can form a plurality of straight line segments, which are distributed radially and converge at the same intersection point, thereby constituting a multi-line radial structure. Of course, in other preferred embodiments, the plurality of first pin holes 111 can be a ring array or a rectangular array, and their specific distribution is not limited.
[0035] In some embodiments, both the first ejector cap 110 and the second ejector cap 130 are circular, and the diameters of the first ejector cap 110 and the second ejector cap 130 are the same. Specifically, the first ejector cap 110 and the second ejector cap 130 are the same size, thereby facilitating the second ejector cap 130 to cover the first ejector cap 110.
[0036] In some embodiments, the top edge of the first ejector cap 110 is provided with a stepped groove 113, and the edge of the second ejector cap 130 is provided with a raised ring 133. The raised ring 133 is correspondingly fitted into the stepped groove 113, so that the second ejector cap 130 is positioned and installed on the first ejector cap 110. Specifically, the stepped groove 113 is annular, and the raised ring 133 is also annular. By fitting the raised ring 133 into the stepped groove 113, a fixed limit can be achieved between the second ejector cap 130 and the first ejector cap 110. Furthermore, the raised ring 133 and the stepped groove 113 can also be an interference fit, thereby preventing the second ejector cap 130 from coming off the first ejector cap 110 during the lifting process.
[0037] In some other preferred embodiments of the present invention, a raised ring 133 is provided on the top side edge of the first ejector cap 110, and a stepped groove 113 is provided on the edge of the first ejector cap 110. The raised ring 133 is correspondingly fitted in the stepped groove 113 so that the second ejector cap 130 is positioned and installed on the first ejector cap 110.
[0038] In some embodiments, the bottom side of the first ejector cap 110 is further provided with a mounting groove 115, which communicates with a plurality of first ejector holes 111 and is configured to correspond and cooperate with a boss on the machine tool. Specifically, a boss is further provided on the boss, the size of which is adapted to the size of the mounting groove 115, and a plurality of ejector pins 200 are provided on the boss. In actual assembly, the first ejector cap 110 can be sleeved on the boss through the mounting groove 115, thereby fixing the first ejector cap 110.
[0039] In some embodiments, the bottom side of the second ejector cap 130 is further provided with a plurality of internal hexagonal grooves 135, the depth of which is less than the thickness of the second ejector cap 130. Specifically, the internal hexagonal grooves 135 are located inside the protruding ring 133 and have a certain depth. When assembling the overall device, there will be some hexagonal bolts on the machine tool. The second ejector cap 130 can be removed from the first ejector cap 110 and the internal hexagonal grooves 135 on the inner side can be used to tighten or loosen the hexagonal bolts or hexagonal nuts on the machine tool. This allows the second ejector cap 130 to also function as a wrench, which is very convenient.
[0040] Furthermore, there are six internal hexagonal recesses 135, which are evenly distributed along the same circumference, and the sizes of the six internal hexagonal recesses 135 are different from each other. Specifically, the six internal hexagonal recesses 135 can be arranged in ascending order, preferably in a proportionally increasing arrangement, so as to be applicable to hexagonal bolts or hexagonal nuts of different specifications, thereby enhancing its applicability.
[0041] This utility model embodiment also provides a ejector pin 200 device, including a machine base and an ejector pin cap structure 100. The ejector pin cap structure 100 includes a first ejector pin cap 110 and a second ejector pin cap 130. The first ejector pin cap 110 is provided with a plurality of first ejector pin holes 111. A portion of the plurality of first ejector pin holes 111 is configured to allow ejector pins 200 on the machine base to pass through. The second ejector pin cap 130 is detachably mounted on the first ejector pin cap 110, and at least one second ejector pin hole 131 is provided in the middle of the second ejector pin cap 130. The second ejector pin hole 131 corresponds to the first ejector pin hole 111 through which the ejector pin 200 passes, so that the ejector pin 200 passes through the first ejector pin hole 111 and the second ejector pin hole 131 in sequence. The second ejector pin cap 130 is also configured to block the first ejector pin hole 111 that does not correspond to the second ejector pin hole 131. A ejector pin 200 is provided on the machine base. A first ejector pin cap 110 is installed on the machine base. A second ejector pin cap 130 is configured to carry a blue film 210 with a chip 230. The ejector pin 200 is configured to pass through the first ejector pin hole 111 and the second ejector pin hole 131 in sequence and abut against the blue film 210 and the chip 230.
[0042] It should be noted that the lifting principle and structure of the ejector pin 200 on the machine can be referred to in the existing technology for the structure of the ejector pin 200, and will not be described in detail here.
[0043] In summary, the ejector cap structure 100 and ejector pin 200 device provided in this embodiment of the present invention adopt a structure in which a first ejector cap 110 and a second ejector cap 130 cooperate with each other. The first ejector cap 110 is mounted on the machine base and is provided with a plurality of first ejector pin holes 111. A portion of the plurality of first ejector pin holes 111 is for the ejector pin 200 to pass through. The second ejector cap 130 is detachably mounted on the first ejector cap 110 and is provided with at least one second ejector pin hole 131 in the middle. The second ejector pin hole 131 corresponds to the first ejector pin hole 111 through which the ejector pin 200 passes, so that the ejector pin 200 passes through the first ejector pin hole 111 and the second ejector pin hole 131 in sequence. The second ejector cap 130 is also configured to block the remaining first ejector pin holes 111. Compared to existing technologies, this invention uses a second ejector cap 130 to block the ejector pin 200 holes through which no ejector pin 200 passes, preventing the remaining ejector pin 200 holes from adhering to the blue film 210 when the ejector pin 200 pushes it out. This ensures the lifting and separation of the chip 230 and prevents the blue film 210 from tearing. Furthermore, the second ejector cap 130 is detachable, allowing for the installation of second ejector caps 130 with different second ejector pin hole 131 specifications according to different chip 230 sizes, ensuring its applicability.
[0044] The above description is only a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model.
Claims
1. A thimble cap structure, characterized in that, The device includes a first ejector cap and a second ejector cap. The first ejector cap is configured to be mounted on a machine base and has a plurality of first ejector holes. A portion of the plurality of first ejector holes is configured to allow ejector pins on the machine base to pass through. The second ejector cap is detachably mounted on the first ejector cap and has at least one second ejector hole in its center. The second ejector hole corresponds to the first ejector hole through which the ejector pin passes, so that the ejector pin passes through the first ejector hole and the second ejector hole in sequence. The second ejector cap is also configured to block first ejector holes that do not correspond to second ejector holes.
2. The pin cap structure according to claim 1, characterized in that, There are multiple second ejector pin holes, which are rectangularly distributed in the center of the second ejector pin cap, and the multiple second ejector pin holes are configured to correspond to the edge of the chip.
3. The pin cap structure according to claim 2, characterized in that, The plurality of first pin holes are distributed radially in multiple lines, and some of the first pin holes are respectively connected to the plurality of second pin holes.
4. The pin cap structure according to claim 1, characterized in that, Both the first ejector cap and the second ejector cap are circular, and the first ejector cap and the second ejector cap have the same diameter.
5. The pin cap structure according to claim 1 or 4, characterized in that, The top edge of the first ejector cap is provided with a stepped groove, and the edge of the second ejector cap is provided with a raised ring. The raised ring is fitted into the stepped groove so that the second ejector cap is positioned and installed on the first ejector cap.
6. The pin cap structure according to claim 1 or 4, characterized in that, The top edge of the first ejector cap is provided with a raised ring, and the edge of the first ejector cap is provided with a stepped groove. The raised ring is correspondingly fitted into the stepped groove so that the second ejector cap is positioned and installed on the first ejector cap.
7. The pin cap structure according to claim 1, characterized in that, The bottom side of the first ejector cap is also provided with an assembly groove, which communicates with a plurality of the first ejector holes and is configured to correspond and cooperate with the boss on the machine base.
8. The pin cap structure according to claim 1, characterized in that, The bottom side of the second ejector cap is also provided with a plurality of internal hexagonal grooves, the depth of which is less than the thickness of the second ejector cap.
9. The pin cap structure according to claim 8, characterized in that, There are 6 internal hexagonal recesses, which are evenly distributed along the same circumference, and the size of each of the 6 internal hexagonal recesses is different.
10. A pin device, characterized in that, The device includes a machine base and the pin cap structure according to any one of claims 1-9, wherein a pin is provided on the machine base, a first pin cap is mounted on the machine base, a second pin cap is configured to carry a blue film with a chip, and the pin is configured to pass through the first pin hole and the second pin hole in sequence and abut against the blue film and the chip.