Metal matrix composite substrate packaging structure for IGBT package with two-dimensional code
By setting a metal layer on a metal matrix composite substrate and combining laser etching and chemical plating processes, the problem of blurred QR codes caused by plating etching is solved, achieving efficient, clear, and scannable QR codes for IGBT packaging and improving management efficiency.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- XIAN MINCO MICROELECTRONIC MATERIALS CO LTD
- Filing Date
- 2025-07-21
- Publication Date
- 2026-06-19
AI Technical Summary
Printing QR codes on traditional IGBT metal matrix composite substrates results in blurry and illegible QR codes due to coating etch, and the existing process is complex and prone to contamination, affecting subsequent use.
A metal layer is placed between the metal matrix composite substrate and the coating. A QR code is etched on the metal layer using a laser etching process, and combined with a chemical plating process to ensure that the QR code is bonded to the metal substrate and avoids coating filling. The laser etching depth and coating thickness are limited to ensure that the QR code is clear and scannable.
This achieves an efficient integration of QR codes and metal substrates, reducing space occupation, enabling quick scanning, improving the efficiency of quality traceability and logistics management, and ensuring the high clarity and integrity of the QR codes.
Smart Images
Figure CN224386144U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of metal matrix composite substrate packaging technology, specifically a metal matrix composite substrate packaging structure for IGBT packaging with a QR code. Background Technology
[0002] Traditional IGBT metal matrix composite substrates are metal bases covered with a complete plating layer. Digital codes are typically printed in non-critical locations, recording only the ID of a single substrate. This results in small data volumes, large space requirements, and the limited blank space on the substrate itself. Furthermore, to facilitate quality traceability and logistics management, the digital codes are becoming increasingly long, making it difficult to carry the necessary information. Laser-printing QR codes on the metal matrix composite substrate, leveraging their high information capacity and ease of use, can solve this problem instead of digital codes.
[0003] However, due to the requirements of IGBT packaging, in order to protect the metal matrix composite substrate of the package, the surface of the metal matrix composite substrate must be covered with a complete coating. Laser etching is not allowed after the coating is completed. Furthermore, because the depth and width of laser etching are small, it is very easy for the coating to fill in the gaps during the coating process, resulting in blurry and difficult-to-read QR codes in the later stages, which causes certain technical obstacles.
[0004] There are several methods for printing QR codes on metal matrix composite substrates. For example, CN219350204U discloses a metal matrix composite substrate packaging structure with QR codes, including a metal matrix composite substrate, a raised ink layer, and a QR code layer. The raised ink layer is formed on the surface of the metal matrix composite substrate and protrudes above the surface of the substrate. The QR code layer is formed on the raised ink layer. The height of the raised ink layer is greater than or equal to the thickness of the excess adhesive layer. Alternatively, QR codes can be produced using inkjet printing, screen printing, etc. However, these methods are complex, easily causing contamination on the finished metal matrix composite substrate surface, and can lead to etching issues during the manufacturing process, affecting the quality of the finished QR code and consequently its subsequent management and use. Utility Model Content
[0005] To address the problem that QR codes on metal matrix composite substrates in existing technologies are affected by coating erosion, this invention provides a metal matrix composite substrate packaging structure for IGBT packaging with QR codes.
[0006] This utility model is achieved through the following technical solution:
[0007] A metal matrix composite substrate packaging structure for IGBT packaging with QR code includes a metal matrix composite substrate, a metal layer and a plating layer. The metal layer covers the surface of the metal matrix composite substrate, a QR code area is set on the metal layer, a QR code is set in the QR code area, the upper surface of the QR code is flush with the upper surface of the metal layer, and the depth of the QR code is less than the thickness of the metal layer; the plating layer covers the metal layer.
[0008] Preferably, the thickness of the metal layer is 10~350μm.
[0009] Preferably, the QR code is etched onto the metal layer using a laser etching process.
[0010] Preferably, the etching depth of the QR code is 10~150μm.
[0011] Preferably, the QR code is composed of a combination of circular dots.
[0012] Preferably, the dot matrix range of the QR code is 3×3~50×50.
[0013] Preferably, the thickness of the coating is 15 μm.
[0014] Preferably, the coating is prepared using a chemical method.
[0015] Preferably, the coating prepared by chemical means is further provided with an electroplated layer.
[0016] Compared with the prior art, the present invention has the following beneficial effects:
[0017] This invention discloses a metal-based composite substrate packaging structure for IGBT packaging with QR codes. By setting a metal layer with QR codes between the metal-based composite substrate and the plating layer, the original structure of marking the surface of the metal-based composite substrate with digital codes is changed. This realizes the combination of QR codes and metal-based composite substrate, saving a lot of space and eliminating the traditional method of manually identifying and recording digital codes. The scanning is convenient and fast, and the data can be directly entered into the system. This has a strong effect on improving the efficiency of warehouse management, online production, traceability, and transportation.
[0018] Furthermore, limiting the etching depth of the QR code is to ensure that the laser does not etch through the metal layer, while also ensuring that the QR code can be scanned and recorded.
[0019] Furthermore, by employing laser etching combined with chemical plating, the original functionality of the packaging structure is preserved, while also enabling high-definition usability of the QR codes on the IGBT metal matrix composite substrate.
[0020] Furthermore, limiting the preparation process and thickness of the coating is to ensure that the coating does not fill the QR code area and that the QR code shape is clear and complete. Attached Figure Description
[0021] Figure 1 This is a cross-sectional view of a metal matrix composite substrate packaging structure for IGBT packaging with a QR code according to this utility model.
[0022] Figure 2 This is a schematic diagram of a metal matrix composite substrate packaging structure for IGBT packaging with a QR code according to this utility model.
[0023] Figure 3 This is a partial enlarged view of the QR code area of a metal matrix composite substrate packaging structure for IGBT packaging with QR codes according to this utility model.
[0024] In the image, 1. Metal matrix composite substrate; 2. Metal layer; 3. Plating layer; 4. QR code. Detailed Implementation
[0025] The present invention will be further described in detail below with reference to specific embodiments. The description is for explanation and not limitation of the present invention.
[0026] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. The components of the embodiments of this application described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.
[0027] It should be noted that the technical features in the following embodiments can be combined with each other without conflict.
[0028] This utility model discloses a metal-based composite material substrate packaging structure for IGBT packaging with a QR code, referring to... Figure 1 , 2 3, including a metal matrix composite substrate 1, a metal layer 2 and a plating layer 3, the metal layer 2 covers the surface of the metal matrix composite substrate 1, a QR code area is provided on the metal layer 2, a QR code 4 is provided in the QR code area, the upper surface of the QR code 4 is flush with the upper surface of the metal layer 2, and the depth of the QR code 4 is less than the thickness of the metal layer 2; the plating layer 3 covers the metal layer 2.
[0029] Among them, the metal layer 2 is a self-generated layer during the manufacturing process of the metal matrix composite substrate 1. It can be a skin layer of aluminum, copper, etc. that is originally integrated with the metal matrix composite material. The thickness of the metal layer 2 is about 10~350μm.
[0030] The QR code 4 is laser-etched onto the metal layer 2. The etching depth of the QR code 4 is approximately 10~150μm. The QR code 4 is composed of a circular dot matrix, with a dot matrix range of 3×3~50×50. Specifically, during production, a domestically produced laser marking machine is used. In the non-working area of the metal matrix composite substrate 1, a special tooling is used for positioning. The laser head is aligned with the center of the QR code area, the light alignment height is set, and red light is selected for marking.
[0031] The thickness of coating 3 is 15 μm, and coating 3 is prepared chemically. Specifically, during the preparation of coating 3, low-concentration hydrochloric acid is used for acid washing, and no alkaline washing is performed. This ensures that coating 3 will not fill the QR code area, resulting in a clear and complete code shape. This ensures that the laser will not etch through the metal layer 2, and also ensures that the QR code 4 is scannable and recordable. Coating 3 can be a commonly used coating such as nickel, gold, or silver, or it can be other less commonly used coatings.
[0032] The coating 3 prepared by chemical methods is further supplemented with chemical plating layers or electroplating layers with different formulations prepared for welding.
[0033] Example 1
[0034] The aluminum-silicon carbide composite metal matrix substrate 1 has an aluminum layer thickness of approximately 250 μm. The laser-etched QR code 4 has a depth of 120 μm, and the laser-etched surface is 5x5 mm. After laser etching, the plating process 3 is performed, using chemical nickel plating. The pretreatment is a 5% hydrochloric acid pickling, without alkaline pickling, and the nickel layer thickness is 15 μm.
[0035] Example 2
[0036] The aluminum-silicon carbide composite metal matrix substrate 1 has an aluminum layer thickness of approximately 300 μm. The selected area is the region within the metal matrix composite substrate 1 without silicon carbide. The laser-etched QR code 4 has a depth of 150 μm, a laser-etched surface of 7.5 x 7.5 mm, and a laser dot matrix of 20 x 20. After laser etching, coating layer 3 is applied using a chemical plating process, with a thickness of 15 μm. A further 6 μm electroplating layer is then added.
[0037] Example 3
[0038] The aluminum-silicon carbide composite metal matrix substrate 1 has an aluminum layer thickness of approximately 180 μm. A domestically produced laser marking machine with a dedicated positioning fixture was used. The laser height was 25 mm, red light was selected, the marking was applied, the dot matrix was 10x10, and the power was set to 20 kW. The laser-etched QR code 4 had a depth of 80 μm, and the etched surface was 4.5 x 4.5 mm. After laser etching, a plating process 3 was performed. Acid washing was done with a 5% hydrochloric acid concentration; no alkaline washing was performed. Electroless nickel plating was used, resulting in a nickel layer thickness of 15 μm.
[0039] Example 4
[0040] The copper-silicon carbide composite metal matrix substrate 1 has a copper layer thickness of approximately 250 μm. A domestically produced laser marking machine with a dedicated positioning fixture was used. The laser height was 20 mm, red light was selected, the marking was applied, the dot matrix was 12x12, and the power was set to 17 kW. The laser-etched QR code 4 had a depth of 85 μm, and the etched surface was 4.5 x 4.5 mm. After laser etching, a plating process 3 was performed. Acid washing was done with a 5% hydrochloric acid concentration; no alkaline washing was performed. Electroless nickel plating was used, and the plating layer 3 had a thickness of 15 μm.
[0041] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the technical solution of the present utility model in any way. Those skilled in the art should understand that, without departing from the spirit and principles of the present utility model, the technical solution can be modified and replaced in several simple ways, and these modifications and replacements are all within the scope of protection covered by the claims.
Claims
1. An IGBT package metal matrix composite substrate package structure having a two-dimensional code, characterized by, The material includes a metal matrix composite substrate (1), a metal layer (2), and a plating layer (3). The metal layer (2) covers the surface of the metal matrix composite substrate (1). A QR code area is provided on the metal layer (2), and a QR code (4) is provided in the QR code area. The upper surface of the QR code (4) is flush with the upper surface of the metal layer (2), and the depth of the QR code (4) is less than the thickness of the metal layer (2). The plating layer (3) covers the metal layer (2).
2. The metal matrix composite substrate package structure for IGBT package with two-dimensional code according to claim 1, wherein, The thickness of the metal layer (2) is approximately 10~350 μm.
3. The metal matrix composite substrate package structure for IGBT package with two-dimensional code according to claim 1, wherein, The QR code (4) is etched onto the metal layer (2) by laser etching process.
4. The metal matrix composite substrate package structure for IGBT package with two-dimensional code according to claim 3, characterized by, The etching depth of the QR code (4) is 10~250μm.
5. The metal matrix composite substrate packaging structure for IGBT packaging with QR code according to claim 3, characterized in that, The QR code (4) is composed of a circular dot matrix.
6. The metal matrix composite substrate packaging structure for IGBT packaging with QR code according to claim 5, characterized in that, The dot matrix range of the QR code (4) is 3×3~50×50.
7. The metal matrix composite substrate packaging structure for IGBT packaging with QR code according to claim 1, characterized in that, The thickness of the coating (3) is 8~25μm.
8. The metal matrix composite substrate packaging structure for IGBT packaging with QR code according to claim 1, characterized in that, The coating (3) is prepared by chemical means.
9. The metal matrix composite substrate packaging structure for IGBT packaging with QR code according to claim 8, characterized in that, The coating (3) prepared by chemical means is further provided with chemical coatings or electroplating layers with different formulations for welding.