Qfn or dfn package frame product finished product cutting process

Abstract

The application discloses a QFN or DFN package frame product finished product cutting process, which comprises the following steps: S1, fixing a product frame to be cut on a single-shaft cutting machine table, performing edge cutting along a frame contour, and quickly removing a metal frame edge around the product frame; S2, transferring the product frame after the edge cutting to a double-shaft cutting machine table; and S3, performing accurate separation cutting of product units on the product frame without the edge waste by the double-shaft cutting machine table, continuously completing all unit cutting, and realizing continuous and uninterrupted work of the double-shaft cutting machine by separating the edge removing process from the fine cutting process, so that downtime waiting time is completely eliminated, product damage caused by manual edge breaking is avoided, and cutting efficiency and production yield are significantly improved.

Description

Technical Field

[0001] This invention relates to the field of semiconductor packaging and testing technology, and more particularly to a cutting process for finished QFN or DFN packaged frame products. Background Technology

[0002] In the traditional semiconductor packaging industry, the dicing of QFN or DFN packaged products is a critical process that determines the final product quality and production efficiency. Currently, the commonly used dicing process in the industry is as follows: the mounted product frame is placed on the work platform of a dual-axis dicing machine. The machine automatically aligns with the cutting path using an image recognition system. The dual-axis machine then works simultaneously, separating and cutting individual units of the product along the preset path. When the cutting path reaches the edge of the product frame, the machine automatically stops, and the operator manually removes the edge metal portion of the cut product frame. The machine then restarts to continue cutting, repeating this cycle until the entire frame product is cut.

[0003] Whenever the cutting path reaches the edge of the frame, the machine must stop cutting and wait for manual removal of the frame edge, which significantly increases the overall cutting time. Manually removing the frame edge is prone to causing scratches, chipping, or frame deformation due to improper operation. Frequent shutdowns and restarts may cause fluctuations in the machine's thermal stability and mechanical precision, affecting the quality of subsequent cuts.

[0004] Therefore, it is necessary to develop a finished product cutting process for QFN or DFN packaged frames to solve the above problems. Summary of the Invention

[0005] The purpose of this invention is to provide a high-efficiency cutting process for finished QFN or DFN packaged frame products.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a cutting process for a finished QFN or DFN packaged frame product, comprising the following steps: Step S1: Fix the product frame to be cut on the working platform of the single-axis cutting machine. The single-axis cutting machine cuts along the contour of the product frame to remove the four edges of the product frame. Step S2: Transfer the finished product frame to the dual-axis cutting machine. Step S3: The dual-axis cutting machine precisely separates and cuts the product units of the product frame after removing the four edges, and continuously completes the cutting of all product units.

[0007] Furthermore, in step S1, the cutting depth of the edge cutting is 80%-90% of the product frame thickness.

[0008] Furthermore, in step S1, after the single-axis machine tool performs edge cutting along the frame contour, the remaining edge of the frame is ≤0.05mm.

[0009] Furthermore, in step S1, the cutting speed of the single-axis machine is 80-120 mm / s.

[0010] Furthermore, after the cutting is completed in step S1, a corner of the frame is lifted with pliers, and the edge of the frame is torn off along the cutting path of the single-axis machine.

[0011] Furthermore, in step S2, the product frame with completed edge cutting is transferred from the single-axis cutting machine to the dual-axis cutting machine via an automated conveyor belt, and the product frame maintains a fixed posture during the transfer process.

[0012] Furthermore, the time for transferring the product frame from the single-axis cutting machine to the dual-axis cutting machine is 5-10 seconds.

[0013] Furthermore, in step S3, the cutting speed of the dual-axis cutting machine is 60-80 mm / s, and the cutting depth is 100% of the product thickness.

[0014] Furthermore, the single-axis cutting machine in step S1 is equipped with a control module that can adjust the cutting speed and cutting depth, as well as a parameter adaptive adjustment module for different frame materials.

[0015] Furthermore, the dual-axis cutting machine in step S3 is equipped with an automatic alignment accuracy compensation module and a cutting process abnormality detection module.

[0016] Compared with existing technologies, the advantages of this invention are as follows: This invention is a cutting process for finished QFN or DFN packaged products, which is characterized by high efficiency. Through the pre-cutting process of a single-axis machine, the edge waste is quickly and automatically removed. This improvement completely eliminates the waiting and manual intervention time in the dual-axis precision cutting process, enabling the dual-axis cutting machine to continuously and stably complete the separation of all product units with optimal parameters. At the same time, it avoids product damage caused by manual edge breaking and precision fluctuations caused by frequent equipment start-ups and shutdowns. Thus, while ensuring cutting quality, it significantly improves the overall cutting efficiency and production smoothness. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1This is a schematic diagram of the cutting process of a finished QFN or DFN packaging frame product according to the present invention. Detailed Implementation

[0019] To further illustrate the technical means and effects adopted by the present invention to achieve its intended purpose, the following, in conjunction with the accompanying drawings and preferred embodiments, details the specific implementation, structure, features, and effects of the QFN or DFN packaging frame product cutting process proposed according to the present invention. In the following description, different "one embodiment" or "another embodiment" do not necessarily refer to the same embodiment. Furthermore, specific features, structures, or characteristics in one or more embodiments can be combined in any suitable form.

[0020] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains.

[0021] The following describes in detail the specific cutting process of the QFN or DFN packaging frame product provided by this invention, with reference to the accompanying drawings.

[0022] Please refer to Figure 1 A process flow for cutting a finished QFN or DFN packaged product: Prepare the product. The product specifications may vary depending on the requirements. In this embodiment, the product specifications are: QFN or DFN package frame, size 200mm×200mm, product array 20×20, totaling 400 units, frame material is copper frame or iron-nickel frame, thickness is 0.2mm.

[0023] Step S1: Pre-cut the frame edge on a single-axis machine.

[0024] The product frame to be cut is fixed on the working platform of a single-axis cutting machine. Cutting parameters are set: the cutting speed and cutting depth are adjusted according to requirements. In this embodiment, the cutting speed is 80-120 mm / s, and the cutting depth is 80%-90% of the frame thickness. The single-axis machine cuts along the frame contour, completely removing the metal frame edges. Testing shows that the remaining edge thickness after cutting is ≤0.05 mm, meeting the requirements for subsequent cutting.

[0025] The single-axis machine used in step S1 is equipped with a control module that allows for adjustable cutting speed and depth, as well as an adaptive alignment adjustment module for different frame materials. High-precision alignment is not required during cutting in step S1; rapid cutting parameters can be used.

[0026] Preferably, after cutting in step S1, use pliers to lift one corner of the frame and tear off the frame along the cutting path of the single-axis machine.

[0027] Step S2: Inter-process transfer.

[0028] After edge cutting, the product frame is transferred to a dual-axis cutting machine via manual or automated conveyor belt. During transport, the product frame maintains a fixed posture and requires no repositioning. The automated conveyor belt connects the single-axis and dual-axis cutting machines, enabling automatic transfer of the product frame between processes.

[0029] In step S2, an automated conveyor belt is used to move the product frame with the edge cut to the dual-axis cutting machine in 5-10 seconds.

[0030] Step S3: Dual-axis machine precision cutting product unit The dual-axis cutting machine precisely separates and cuts product units from the product frame. Cutting parameters are set: cutting speed and cutting depth are adjusted according to requirements. In this embodiment, the cutting speed is 60-80 mm / s, and the cutting depth is 100% of the product thickness. The dual-axis machine is equipped with an automatic alignment accuracy compensation module and a cutting process anomaly detection module. It operates continuously, sequentially completing the separation and cutting of 400 product units without requiring any downtime.

[0031] This invention provides a cutting process for finished QFN or DFN packaged products, characterized by high efficiency. Through a pre-cutting process on a single-axis machine, it achieves rapid and automated removal of edge waste. This improvement completely eliminates the waiting and manual intervention time in the dual-axis precision cutting process, enabling the dual-axis cutting machine to continuously and stably complete the separation of all product units with optimal parameters. At the same time, it avoids product damage caused by manual edge breaking and precision fluctuations caused by frequent equipment start-ups and shutdowns. Thus, while ensuring cutting quality, it significantly improves overall cutting efficiency and production smoothness.

[0032] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A cutting process for a finished QFN or DFN packaged frame product, characterized in that, Includes the following steps: Step S1: Fix the product frame to be cut on the working platform of the single-axis cutting machine. The single-axis cutting machine cuts along the contour of the product frame to remove the four edges of the product frame. Step S2: Transfer the finished product frame to the dual-axis cutting machine. Step S3: The dual-axis cutting machine precisely separates and cuts the product units of the product frame after removing the four edges, and continuously completes the cutting of all product units.

2. The cutting process for the finished QFN or DFN packaged frame product according to claim 1, characterized in that: In step S1, the cutting depth of the edge cutting is 80%-90% of the product frame thickness.

3. The cutting process for the finished QFN or DFN packaged frame product according to claim 1, characterized in that: In step S1, after the single-axis machine tool performs edge cutting along the frame contour, the remaining frame edge is ≤0.05mm.

4. The finished product cutting process of the QFN or DFN packaged frame product according to claim 1, characterized in that: In step S1, the cutting speed of the single-axis machine is 80-120 mm / s.

5. The finished product cutting process of the QFN or DFN packaged frame product according to claim 1, characterized in that: After the cutting is completed in step S1, a corner of the frame is lifted with pliers and the edge of the frame is torn off along the cutting path of the single-axis machine.

6. The cutting process for the finished QFN or DFN packaged frame product according to claim 1, characterized in that: In step S2, the product frame with the edge cut is transferred from the single-axis cutting machine to the dual-axis cutting machine via an automated conveyor belt, and the product frame maintains a fixed posture during the transfer process.

7. The cutting process for the finished QFN or DFN packaged frame product according to claim 6, characterized in that: The product frame takes 5-10 seconds to transfer from a single-axis cutting machine to a dual-axis cutting machine.

8. The cutting process for the finished QFN or DFN packaged frame product according to claim 1, characterized in that: In step S3, the cutting speed of the dual-axis cutting machine is 60-80 mm / s, and the cutting depth is 100% of the product thickness.

9. The cutting process for the finished QFN or DFN packaged frame product according to claim 1, characterized in that: The single-axis cutting machine in step S1 is equipped with a control module that can adjust the cutting speed and cutting depth, as well as a parameter adaptive adjustment module for different frame materials.

10. The finished product cutting process of the QFN or DFN packaged frame product according to claim 1, characterized in that: The dual-axis cutting machine in step S3 is equipped with an automatic alignment accuracy compensation module and a cutting process abnormality detection module.

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