Hot pressing structure with mistake proofing function
By setting a bonding window and an inverted conical anti-reverse hole on the press plate of the hot-pressed structure, and applying a reflective layer in the anti-reverse hole, the problem of indistinguishable front and back placement in the symmetrical frame and chip package in the prior art is solved, and high-reliability anti-error identification and equipment flexibility are achieved.
Patent Information
- Application Number
- CN202421217397.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-30
- Publication Date
- 2025-02-28
- Estimated Expiration
- 2034-05-30
AI Technical Summary
When handling the packaging of symmetrical frames and chips, it is difficult to effectively distinguish the positive and negative placement, resulting in reduced equipment operation speed and high cost, and frequent sensor error detection.
A hot pressing structure with anti-error function is designed, including a press plate and a heat block. The press plate is equipped with a bonding window and an anti-reverse hole. The anti-reverse hole is in an inverted conical through-hole and a reflective layer is coated inside. It is used to identify the anti-error mark through the machine camera to avoid error-mounting of the lead frame.
It realizes high-reliability anti-error identification, reduces the frequency of error detection in equipment operations, improves the flexibility and applicability of the equipment, and is at a low cost.
Smart Images
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Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of chip manufacturing and relates to a hot pressing structure with an error-proofing function. Background Art
[0002] In the packaging industry, the bonding hot pressing plate uses a set of hot pressing plates (divided into a heating block and a pressing plate). During the bonding operation, the machine pulling system pulls the frame to the corresponding position on the heating block, and then presses the pressing plate to fix the frame. The machine identifies whether the frame position and chip position are accurate, and then starts the operation. The area recognized by the machine is the position of the pressing plate window, which is also the position of the chip processing. However, the pin-symmetrical frame, in the processing position, has the same shape in the forward and reverse placement in the machine camera field of view.
[0003] In the prior art, a sensor is generally added to the feed port to monitor the positioning holes on the frame to determine whether the frame is placed upside down. There are few packaging products with symmetrical frames and symmetrical chips. This method is not convenient for equipment that frequently replaces different hot pressing plates to deal with other packaging products with asymmetrical frames. It will reduce the operating speed of the equipment and increase the cost. In addition, more defects will occur when the sensor makes a false detection. Summary of the invention
[0004] The utility model aims to provide a hot pressing structure with error-proofing function, which can solve the above-mentioned problems and has high detection reliability.
[0005] According to the technical solution provided by the utility model: a hot pressing structure with error-proofing function includes a pressing plate and a heat block, a bonding window is provided on the pressing plate, an anti-reflection hole is provided on one side of the bonding window, a mounting structure is provided on the pressing plate, the anti-reflection hole is an inverted cone-shaped through hole, and a reflective layer is coated in the anti-reflection hole.
[0006] As a further improvement of the present invention, the bonding windows are arranged in 2 columns and 7 rows in the middle of the pressing plate.
[0007] As a further improvement of the present invention, the anti-reverse holes are located on the left side of the bonding window and are also arranged in 2 columns and 7 rows.
[0008] As a further improvement of the utility model, the mounting structure includes a mounting hole, a mounting groove, and a positioning groove; the mounting hole and the mounting groove are symmetrically arranged on both sides of the pressing plate; and the positioning groove is located at the upper part of the pressing plate.
[0009] As a further improvement of the utility model, a pressing plate pressure row is provided at the bottom of the pressing plate.
[0010] As a further improvement of the present invention, a vacuum hole is provided on the heat block.
[0011] As a further improvement of the present invention, the pressing plate and the heat block are both installed in the bonding device, and the pressing plate is located above the heat block.
[0012] The positive effects of this application are:
[0013] The utility model has low cost and can be flexibly applied to various machines and has high detection reliability. BRIEF DESCRIPTION OF THE DRAWINGS
[0014] Figure 1 It is a top view of the pressing plate of the utility model.
[0015] Figure 2 It is a front view of the pressing plate of the utility model.
[0016] Figure 3 It is a top view of the heat block of the utility model.
[0017] Figure 4 It is a top view of the lead frame of the utility model.
[0018] Figure 5 This is a schematic diagram of correctly placing the lower lead frame and the pressing plate of the utility model.
[0019] Figure 6 This is a schematic diagram of the combination of the lower lead frame and the pressing plate when they are incorrectly placed in the present invention.
[0020] Figure 1-Figure 6 It includes a mounting groove 7, a mounting hole 8, a positioning groove 9, a bonding window 11, an anti-reverse hole 13, a lead frame 17, a base island 17-1, a positioning boss 17-2, etc. DETAILED DESCRIPTION
[0021] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present invention can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.
[0022] In order to enable those skilled in the art to better understand the solution of the utility model, the following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the utility model.
[0023] It should be noted that the terms "first", "second", etc. in the specification and claims of the utility model and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged where appropriate, so as to describe the embodiments of the utility model described herein. In addition, similar terms such as "including" and "having" mean that in addition to those contents already listed in "including" and "having", other contents that have not been listed can also be "included" and "having"; for example, a process, method, system, product or device that can include a series of steps or units is not necessarily limited to those steps or units that have been clearly listed, but can include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.
[0024] Due to the angle of the drawing, some components may not be drawn, but their positions and connection relationships can be partially understood based on the text expression.
[0025] like Figure 1 As shown, the utility model is a hot pressing structure with error-proofing function, including a pressing plate and a heat block, and a bonding window 11 is provided on the pressing plate, and the bonding window 11 is the processing area of the bonding equipment. An anti-reverse hole 13 is provided on one side of the bonding window 11, and the anti-reverse hole 13 is used to observe the error-proofing mark on the lead frame 17 during bonding to avoid the lead frame 17 from being installed incorrectly. A mounting structure is provided on the pressing plate for connecting with the packaging equipment.
[0026] like Figure 2 As shown, in order to improve the recognition ability of the anti-reflection hole 13, the anti-reflection hole 13 is an inverted cone-shaped through hole, and a reflective layer 14 is coated inside the anti-reflection hole 13 to increase the brightness inside the hole, making the device image brighter and easier to identify.
[0027] In this embodiment, the bonding windows 11 are arranged in 2 rows and 7 columns in the middle of the pressure plate. Correspondingly, the anti-reflection holes 13 are located on the left side of the bonding windows 11 and are also arranged in 2 rows and 7 columns. Affected by the width of the lead frame 17 and the original width of the pressure plate, the last row of anti-reflection holes 13 is only half-hole.
[0028] The mounting structure includes a mounting hole 8, a mounting groove 7, and a positioning groove 9. The mounting hole 8 and the mounting groove 7 are symmetrically arranged on both sides of the pressing plate. The positioning groove 9 is located at the upper part of the pressing plate.
[0029] A pressing plate pressing row 15 is provided at the bottom of the pressing plate. The pressing plate pressing row 15 is in contact with the lead frame 17 , so that the pressing strength of the lead frame 17 can be improved.
[0030] like Figure 3 As shown, a vacuum hole 16 is provided on the heat block for adsorbing the base island 17-1 in the middle of the lead frame 17 to make the lead frame 17 more stable. The base island 17-1 is used to install the chip. Figure 4 shown.
[0031] Both the pressure plate and the heat block are installed in the bonding equipment, with the pressure plate located above the heat block.
[0032] The working process of the utility model is as follows:
[0033] The lead frame 17 is provided with a positioning boss 17 - 2 , which plays a role in positioning and identification in the subsequent rib cutting and bending work.
[0034] In the bonding process, the positioning boss 17 - 2 is placed below the anti-reverse hole 13 , and the positioning boss 17 - 2 is used to prevent the lead frame 17 from being reversely mounted in the bonding process.
[0035] During bonding, the lead frame 17 is placed in the bonding device and fixed by a heat block, and then the pressure plate is moved down to press the lead frame 17 for bonding, and the chip and the lead frame 17 are connected through pins.
[0036] like Figure 5 As shown, the machine camera finds and identifies the positioning boss 17-2 in the anti-reverse hole 13, records it as correct, and performs bonding. Figure 6 As shown, when the machine camera fails to find and identify the positioning boss 17 - 2 in the anti-reverse hole 13 , it is recorded as an error and an alarm is issued.
[0037] It is understood that the above embodiments are merely exemplary embodiments used to illustrate the principles of the present invention, but the present invention is not limited thereto. For those skilled in the art, various modifications and improvements can be made without departing from the spirit and essence of the present invention, and these modifications and improvements are also considered to be within the scope of protection of the present invention.
Claims
1. A hot pressing structure with error-proofing function, comprising a pressing plate and a heat block, characterized in that: A bonding window (11) is provided on the pressure plate, an anti-reflection hole (13) is provided on one side of the bonding window (11), a mounting structure is provided on the pressure plate, the anti-reflection hole (13) is an inverted cone-shaped through hole, and a reflective layer (14) is coated inside the anti-reflection hole (13).
2. The hot pressing structure with error-proofing function according to claim 1, characterized in that: The bonding windows (11) are arranged in 2 columns and 7 rows in the middle of the pressing plate.
3. The hot pressing structure with error-proofing function according to claim 2, characterized in that: The anti-reflection holes (13) are located on the left side of the bonding window (11) and are also arranged in 2 columns and 7 rows.
4. The hot pressing structure with error-proofing function according to claim 1, characterized in that: The mounting structure comprises a mounting hole (8), a mounting groove (7), and a positioning groove (9); the mounting hole (8) and the mounting groove (7) are symmetrically arranged on both sides of the pressing plate; and the positioning groove (9) is located on the upper part of the pressing plate.
5. The hot pressing structure with error-proofing function according to claim 1, characterized in that: A pressing plate pressing row (15) is provided at the bottom of the pressing plate.
6. The hot pressing structure with error-proofing function according to claim 1, characterized in that: A vacuum hole (16) is provided on the heat block.
7. The hot pressing structure with error-proofing function according to claim 1, characterized in that: Both the pressure plate and the heat block are installed in the bonding equipment, with the pressure plate located above the heat block.