Semiconductor chip carrier tape heat sealing cover film and character detection light source
By stacking the first and second light source components, using the combined irradiation and polarization processing of blue and red light, the problem of indentation and offset of the cover film in the prior art is solved, and the tape carrying of the semiconductor chip is realized efficient detection.
Patent Information
- Application Number
- CN202420621461.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-03-28
- Publication Date
- 2025-01-03
- Estimated Expiration
- 2034-03-28
AI Technical Summary
Existing light sources cannot accurately detect cover film indentation and cover film offset during carrier tape detection, and adjusting indentation will affect the offset detection effect.
The first and second light source components are stacked. The first light source components include an astigmatism plate and a polarizing film, emitting blue light of 450-480 nm and red light of 620-650 nm. The light is processed through the polarizing film and the astigmatism plate to increase the uniformity of the light. and polarization, and be detected with a polarization mirror.
The grayscale difference between the cover film and the carrier tape is improved, the detection difficulty is reduced, and the cover film offset and characters can be clearly detected, which enhances the detection effect.
Smart Images
Figure CN222299919U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of semiconductor packaging detection, in particular to a semiconductor chip carrier tape heat sealing cover film and a character detection light source. Background Art
[0002] In the industrial production process, it is necessary to perform mark recognition and surface quality inspection on the taped IC package products. It is necessary to determine whether there is a laser mark on the chip, whether the mark is correct, and whether there are surface quality defects such as damage and scratches on the chip surface. Among them, using a machine vision inspection system for mark recognition and surface quality inspection is the most effective and fastest inspection method. The light source is the most important part of the system.
[0003] In the semiconductor chip industry, a considerable number of chips will be loaded into carriers after being tested by test equipment, and fixed on the carriers with transparent film by high-temperature pressing, so that the products are sealed in the carriers for shipment. At present, the packaging quality inspection of carrier cover films has the following problems: 1. There are many types of transparent films, and the image effects of cover film indentation vary greatly, and some are difficult to detect; 2. While detecting the cover film indentation, it is also necessary to detect the offset of the cover film, and the current light source cover film offset detection has been unstable or even impossible to detect.
[0004] For example, Chinese patent document CN111503544A discloses a combined light source for detecting SOT or SOP chips in a braided tape, including a first light source component, a second light source component and a square light source, wherein the second light source component is installed at the front end of the first light source component, and the square light source is installed at the rear end of the first light source component. The application adopts a combined light source, which retains the light position of the seal detection light source, so that the pins and seal detection do not affect each other; the square light source uses a patch LED with a larger diffusion angle to illuminate from all sides, and illuminates the product through an integrated diffuser plate. Two groups of red and blue LEDs are used inside the square light source, and different brightness settings are used to eliminate the problem of blackening of the product pins. However, when the application detects the carrier tape, the grayscale difference between the cover film and the carrier tape is not much, resulting in the inability to accurately detect the offset of the cover film. At the same time, the application will affect the offset effect while adjusting the indentation, and may even fail to detect the offset. Utility Model Content
[0005] 1. Technical problems to be solved by the utility model
[0006] In view of the fact that the existing light source cannot detect the problem of cover film indentation detection and cover film deviation during carrier tape detection, the utility model provides a semiconductor chip carrier tape heat-sealed cover film and a character detection light source to solve the above problems.
[0007] 2. Technical solution
[0008] In order to achieve the above-mentioned purpose, the technical solution provided by the utility model is:
[0009] The utility model discloses a semiconductor chip carrier with a heat-sealed cover film and a character detection light source, comprising a first light source component and a second light source component, wherein the first light source component and the second light source component are stacked and arranged, and the first light source component and the second light source component are used to emit two lights with different wavelengths; the first light source component comprises a first light source, and a diffuser plate and a first polarizing film are arranged at the light outlet of the first light source, and the diffuser plate and the first polarizing film are stacked and covered on the surface of the first light source.
[0010] As a further improvement of the utility model, the first light source assembly also includes a first fixing plate, the first light source is arranged on the first fixing plate, a first detection hole is opened in the middle of the first fixing plate, and the first light source is arranged on the side of the first detection hole of the first fixing plate.
[0011] As a further improvement of the present invention, at least two first light sources are provided and are arranged relatively along the circumference of the detection hole and are jointly provided on the first fixing plate.
[0012] As a further improvement of the utility model, the first polarizing film is attached to a light diffuser plate, and the light diffuser plate covers the first light source.
[0013] As a further improvement of the present invention, the second light source assembly includes a second fixing plate and a second light source, and the second light source is arranged on the second fixing plate at a position corresponding to that of the first light source.
[0014] As a further improvement of the utility model, the first fixed plate includes a first back plate, and multiple first side plates are arranged along the circumference of the first back plate, and the multiple first side plates are connected to form an outer frame; a first mounting plate is arranged on the first side plate, and the first mounting plate is arranged at an angle.
[0015] As a further improvement of the utility model, the first light source is arranged on the first mounting plate; a first detection hole is opened in the middle of the first back plate, and a plurality of limit blocks are arranged around the first detection hole.
[0016] As a further improvement of the present invention, the first light source is arranged closely to the first mounting plate, the diffuser is connected to the first mounting plate, and one end of the diffuser is against the limit block.
[0017] As a further improvement of the utility model, the second fixed plate includes a second back plate, a plurality of second side plates are circumferentially arranged on the second back plate, and the plurality of second side plates are connected to form an outer frame; some of the second side plates are provided with mounting slopes, and the remaining second side plates are provided with cover plate mounting grooves.
[0018] As a further improvement of the present invention, the number of the second side panels provided with the mounting slopes corresponds to the number of the second light sources.
[0019] 3. Beneficial effects
[0020] Compared with the existing known technologies, the technical solution provided by the utility model has the following significant effects:
[0021] The utility model is a semiconductor chip carrier tape heat-sealed cover film and character detection light source. Two light sources are installed in the device and arranged in a stacked manner. Two light sources of different wavelengths simultaneously illuminate the carrier tape of the semiconductor chip, wherein the first light source emits blue light with a wavelength of 450-480nm, and the second light source emits red light with a wavelength of 620-650nm. After the blue light passes through the integrated diffuser plate and the polarizing film, the light has both uniformity and polarization characteristics. At this time, adding a polarizing filter to the lens can achieve the goal of illuminating the cover film while filtering out the reflection of the carrier tape, greatly improving the grayscale difference between the cover film and the carrier tape, and reducing the detection difficulty of the software. At the same time, the red light also passes through the polarizing film to irradiate the carrier tape. It is only necessary to ensure that the polarization direction of the red light polarizing film is consistent with the polarization direction of the blue light polarizing film to simultaneously take into account the detection effect of the characters and the cover film. BRIEF DESCRIPTION OF THE DRAWINGS
[0022] Figure 1 This is a schematic diagram of the overall structure of the detection light source of the utility model;
[0023] Figure 2 This is a schematic diagram of the positions of the detection light source and the chip carrier of the utility model;
[0024] Figure 3 This is a schematic diagram of the structure disassembly of the detection light source of the utility model;
[0025] Figure 4 It is a structural schematic diagram of the first fixing plate in the utility model;
[0026] Figure 5 It is a structural schematic diagram of the second fixing plate in the utility model;
[0027] Figure 6 It is a structural schematic diagram of the light source housing in the utility model.
[0028] Explanation of the numbers in the schematic diagram:
[0029] 1. first light source assembly; 11. first fixing plate; 111. first back plate; 112. first side plate; 113. first mounting plate; 114. detection frame; 115. limit block; 116. first detection hole; 12. first light source; 13. diffuser plate; 14. first polarizing film; 15. cardboard;
[0030] 2. Second light source assembly; 21. Second fixing plate; 211. Second side plate; 212. Second back plate; 213. Second detection hole; 214. Mounting slope; 215. Cover plate mounting groove; 216. First wire groove; 22. Second light source; 23. Light source housing; 231. Third side plate; 232. Third back plate; 233. Second wire groove; 24. Second polarizing film; 25. Cover plate;
[0031] 3. Carrier tape; 4. Wires. DETAILED DESCRIPTION
[0032] In order to make the above-mentioned purposes, features and advantages of the utility model more obvious and easy to understand, the specific implementation methods of the utility model are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the utility model. However, the utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the utility model, so the utility model is not limited by the specific embodiments disclosed below.
[0033] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.
[0034] In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present utility model, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.
[0035] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.
[0036] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.
[0037] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used herein are for illustrative purposes only and are not intended to be the only implementation method.
[0038] Example
[0039] Combination Figure 1 , a semiconductor chip carrier tape heat-sealed cover film and a character detection light source of this embodiment include a first light source assembly 1 and a second light source assembly 2, and the first light source assembly 1 and the second light source assembly 2 are stacked. In this embodiment, the detection light source is arranged above the carrier tape 3, so the first light source assembly 1 is arranged on the upper layer, and the second light source assembly 2 is arranged on the lower layer, and the first light source assembly 1 and the second light source assembly 2 are stacked together, thereby reducing the space occupied by the light source, and making the detection equipment more compact and portable. In this embodiment, the first light source assembly 1 and the second light source assembly 2 are respectively connected to a wire 4, and the wire 4 supplies power to the light source assembly. In this embodiment, the first light source assembly 1 and the second light source assembly 2 are used to emit two kinds of light with different wavelengths, wherein the first light source assembly 1 emits blue light with a wavelength of 450-480nm, and the second light source assembly 2 emits red light with a wavelength of 620-650nm.
[0040] Combination Figure 3 In this embodiment, the first light source assembly 1 includes a first fixing plate 11 and a first light source 12. The first light source 12 is disposed on the first fixing plate 11. Figure 4 In this embodiment, the first fixed plate 11 includes a first back plate 111. The first back plate 111 of this embodiment is a quadrilateral plate, more specifically, a square plate. According to the requirements of different devices, the first back plate 111 of this embodiment can be various shapes such as square, rectangular, circular, etc., which are not specifically limited in this embodiment. A plurality of first side plates 112 are arranged along the circumference of the first back plate 111, and the plurality of first side plates 112 are connected to form an outer frame. Since the first back plate 111 of this embodiment is a square plate, in order to facilitate processing, a first side plate 112 is arranged on each of the four sides of the first back plate 111 in this embodiment, and the four first side plates 112 are connected to each other to form an outer frame. In this embodiment, the upper end of the first side plate 112 is connected to the first back plate 111, and the lower end is connected to the first mounting plate 113. The first mounting plate 113 is arranged obliquely. In this embodiment, the first mounting plate 113 is inclined downward so that the vertical line of its inner side surface faces the lower part. In this embodiment, in order to facilitate the installation of the first fixing plate 11, the outer side surfaces of the first side plate 112 and the first mounting plate 113 are connected to form a plane, and a plurality of first mounting plates 113 are connected to form an outer frame, and the outer frame area formed by the first side plate 112 is smaller than the outer frame area formed by the first mounting plate 113. A wire groove (not shown in the figure) for the wire 4 to pass through is provided on at least one first side plate 112.
[0041] In this embodiment, a square first detection hole 116 is provided in the middle of the first fixing plate 11, and a circle of square detection frames 114 are arranged along the circumference of the first detection hole 116 to strengthen the strength of the first fixing plate 11. A stop block 115 is arranged on each of the four sides of the detection frame 114, each stop block 115 corresponds to a first mounting plate 113, and there is a gap between the stop block 115 and the first back plate 111.
[0042] In the present embodiment, the first light source 12 is arranged on the side of the first detection hole 116 of the first fixing plate 11. In the present embodiment, two first light sources 12 are arranged, which are symmetrically arranged on the first fixing plate 11 along the first detection hole 116 and fixed on the inclined surface of the first mounting plate 113 by screws. In the present embodiment, only two first light sources 12 are arranged, and 3, 4 or even more first light sources 12 can also be arranged as needed. When less than 4 first light sources 12 are arranged, the first light sources 12 are respectively fixed on the inclined surfaces of the four first mounting plates 113. When more first light sources 12 are arranged, it is necessary to change the shape of the first fixing plate 11 so that a first light source 12 is installed on each side thereof. Alternatively, the first fixing plate 11 is changed to a polygon or a circle, and multiple first light sources 12 are arranged.
[0043] In this embodiment, a diffuser plate 13 is further provided. The diffuser plate 13 in this embodiment is an integrated diffuser plate. The diffuser plate 13 includes a diffuser plate body, a first opening, and a second opening. The diffuser plate body has a first opening at one end and a second opening at the other end. The second opening is larger than the first opening, and the entire body is in a quadrangular pyramid shape. In this embodiment, the diffuser plate 13 is fixed to the first mounting plate 113 on which the first light source 12 is not installed by screws. It is worth mentioning that in order to prevent the diffuser 13 from being too close to the first light source 12 and causing damage to the lamp beads on the first light source 12, the first light source 12 is arranged close to the first mounting plate 113 in this embodiment. When the diffuser 13 is fixed on the first mounting plate 113, the first open end abuts against the limit block 115. Since there is a gap between the limit block 115 and the first back plate 111, the first light source 12 directly abuts against the first back plate 111, and the diffuser 13 abuts against the limit block 115, thereby creating a gap between the diffuser 13 and the first light source 12, thereby preventing the diffuser 13 from causing damage to the lamp beads.
[0044] In this embodiment, a first polarizing film 14 is attached to a side of the diffuser plate 13 away from the first light source 12. To save costs, the first polarizing film 14 is only provided on the side with the first light source 12, and the number is the same as the first light source 12, and the position corresponds to the first light source 12. In this embodiment, a clamping plate 15 is provided on the diffuser plate 13, and screws pass through the clamping plate 15 and the diffuser plate 13 to fix the diffuser plate 13, thereby preventing the screws from damaging the diffuser plate 13.
[0045] Combination Figure 5 In this embodiment, the second light source assembly 2 includes a second fixing plate 21 and a second light source 22, and the second light source 22 is arranged on the second fixing plate 21, and the position corresponds to the first light source 12. In this embodiment, the first light source 12 and the second light source 22 appear in pairs, and the positions correspond when they are stacked up and down, forming a facing state. In this embodiment, the second fixing plate 21 includes a second back plate 212, and the second back plate 212 is circumferentially provided with a plurality of second side plates 211, and the plurality of second side plates 211 are connected to form an outer frame; wherein some of the second side plates 211 are provided with mounting bevels 214, and the remaining second side plates 211 are provided with cover plate mounting grooves 215. The shape of the second fixing plate 21 and the second light source 22 installed thereon correspond to the first fixing plate 11 and the first light source 12. Specifically in this embodiment, the second fixing plate 21 is also square, and a total of four second side plates 211 are arranged on the four sides, wherein two second side plates 211 are provided with mounting bevels 214, and the two mounting bevels 214 are symmetrically arranged, and a second light source 22 is arranged on each mounting bevel 214. A second detection hole 213 is formed in the middle of the second back plate 212, and the second detection hole 213 is connected to the first detection hole 116 to form a detection channel. In this embodiment, at least one second side plate 211 is provided with a first wire groove 216 to facilitate the wire 4 to pass through.
[0046] In the present embodiment, the second light source 22 is placed in the light source housing 23, and the light source housing 23 is fixed to the mounting bevel 214 by screws. The light source housing 23 includes a third back plate 232, and a third side plate 231 is circumferentially arranged to form a mounting groove, and the second light source 22 is placed in the mounting groove. A second wire groove 233 is arranged on at least one third side plate 231 to facilitate the passage of the wire 4. A second polarizing film 24 is arranged at the open mouth of the light source housing 23, and the polarization direction of the second polarizing film 24 is consistent with that of the first polarizing film 14. A cover plate 25 is arranged in the cover plate mounting groove 215. In the present embodiment, since two first light sources 12 and second light sources 22 are symmetrically arranged, during detection, the carrier tape 3 passes through the first light source 12 and the second light source 22 at the same time, that is, perpendicular to the first light source 12 and the second light source 22. The specific placement position is as follows: Figure 2 When the light source of this embodiment is used to detect the carrier tape 3, the problem of cover film deviation can be clearly detected.
[0047] The above schematically describes the present invention and its implementation methods, which are not restrictive. The drawings show only one implementation method of the present invention, and the actual structure is not limited thereto. Therefore, if ordinary technicians in this field are inspired by it and design structural methods and embodiments similar to the technical solution without creativity without departing from the purpose of the present invention, they should all fall within the protection scope of the present invention.
Claims
1. A semiconductor chip carrier with a heat-sealed cover film and a character detection light source, characterized in that: The invention comprises a first light source assembly (1) and a second light source assembly (2), wherein the first light source assembly (1) and the second light source assembly (2) are stacked and arranged, and the first light source assembly (1) and the second light source assembly (2) are used to emit two kinds of light with different wavelengths; the first light source assembly (1) comprises a first light source (12), and a diffuser plate (13) and a first polarizing film (14) are arranged at the light outlet of the first light source (12), and the diffuser plate (13) and the first polarizing film (14) are stacked and covered on the surface of the first light source (12).
2. A semiconductor chip carrier heat-sealing cover film and character detection light source according to claim 1, characterized in that: The first light source assembly (1) further comprises a first fixing plate (11), the first light source (12) being arranged on the first fixing plate (11), a first detection hole (116) being provided in the middle of the first fixing plate (11), and the first light source (12) being arranged on the side of the first detection hole (116) of the first fixing plate (11).
3. A semiconductor chip carrier tape heat-sealing cover film and character detection light source according to claim 2, characterized in that: At least two first light sources (12) are provided and are arranged relatively along the circumference of the detection hole and are jointly provided on the first fixing plate (11).
4. A semiconductor chip carrier tape heat-sealing cover film and character detection light source according to claim 1, characterized in that: The first polarizing film (14) is attached to the light diffuser (13), and the light diffuser (13) covers the first light source (12).
5. The semiconductor chip carrier heat-sealing cover film and character detection light source according to claim 3, characterized in that: The second light source assembly (2) comprises a second fixing plate (21) and a second light source (22); the second light source (22) is arranged on the second fixing plate (21) at a position corresponding to the first light source (12).
6. The semiconductor chip carrier heat-sealing cover film and character detection light source according to claim 3, characterized in that: The first fixed plate (11) comprises a first back plate (111), a plurality of first side plates (112) are arranged along the circumference of the first back plate (111), and the plurality of first side plates (112) are connected to form an outer frame; a first mounting plate (113) is arranged on the first side plate (112), and the first mounting plate (113) is arranged at an angle.
7. A semiconductor chip carrier tape heat-sealing cover film and character detection light source according to claim 6, characterized in that: The first light source (12) is arranged on a first mounting plate (113); a first detection hole (116) is provided in the middle of the first back plate (111), and a plurality of limit blocks (115) are arranged around the first detection hole (116).
8. The semiconductor chip carrier heat-sealing cover film and character detection light source according to claim 6, characterized in that: The first light source (12) is arranged closely to the first mounting plate (113); the light diffusion plate (13) is connected to the first mounting plate (113), and one end of the light diffusion plate is against the limit block (115).
9. The semiconductor chip carrier heat-sealing cover film and character detection light source according to claim 5, characterized in that: The second fixed plate (21) comprises a second back plate (212), and a plurality of second side plates (211) are arranged circumferentially on the second back plate (212), and the plurality of second side plates (211) are connected to form an outer frame; some of the second side plates (211) are provided with mounting inclined surfaces (214), and the remaining second side plates (211) are provided with cover plate mounting grooves (215).
10. A semiconductor chip carrier heat-sealing cover film and character detection light source according to claim 9, characterized in that: The number of the second side panels (211) provided with the mounting inclined surfaces (214) corresponds to the number of the second light sources (22).