Tantalum capacitor case package structure with improved mechanical strength
By using a multi-layered structural design and reinforcing ribs, the shortcomings of tantalum capacitor shells in terms of mechanical strength and protection are overcome, achieving higher structural strength and resistance to external forces.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- ZHENJIANG GEM OPTOELECTRONIC TECH CO LTD
- Filing Date
- 2025-06-20
- Publication Date
- 2026-06-16
AI Technical Summary
Conventional tantalum capacitor casings have relatively limited mechanical strength and protection, making them susceptible to structural damage from external forces.
It adopts a multi-layer structure design, including an outer encapsulation shell, a middle encapsulation shell, and an inner encapsulation shell. The outer encapsulation shell is composed of a tantalum metal layer, a thickened oxide layer, and a protective plating layer. The middle encapsulation shell is composed of high-strength plastic material and a fiberglass layer. The inner encapsulation shell is made of ceramic material, and a shielding coating is sprayed on the surface of each layer. Reinforcing ribs are set at the bottom and surface of the outer shell to disperse stress.
It significantly improves the mechanical strength, wear resistance, corrosion resistance, and electromagnetic interference resistance of tantalum capacitor casings, and enhances the load-bearing capacity and deformation resistance of the structure.
Smart Images
Figure CN224366691U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of tantalum capacitor shell packaging technology, specifically a tantalum capacitor shell packaging structure that improves mechanical strength. Background Technology
[0002] A tantalum capacitor is a polarized capacitor that uses tantalum metal as the anode, a tantalum oxide layer formed on the surface as the dielectric, and a conductive cathode surrounding it. This structure gives it high capacitance per unit volume and excellent frequency characteristics. The encapsulation structure of tantalum capacitors mainly includes two types: solid tantalum capacitors and liquid tantalum capacitors.
[0003] Conventional tantalum capacitors have relatively simple casing structures, which are relatively limited in terms of structural strength and protection. This makes it possible for tantalum capacitors to be damaged by external forces during use. Utility Model Content
[0004] The purpose of this invention is to provide a tantalum capacitor housing encapsulation structure with improved mechanical strength to solve the problems mentioned in the background art.
[0005] To achieve the above objectives, this utility model provides the following technical solution: a tantalum capacitor shell encapsulation structure for improving mechanical strength, comprising an outer encapsulation shell and a middle encapsulation shell, wherein the middle encapsulation shell is disposed inside the outer encapsulation shell, and an inner encapsulation shell is disposed inside the middle encapsulation shell, and the inner wall surface of the inner encapsulation shell is coated with a shielding coating, a lead frame is installed on one side of the outer encapsulation shell, a base is disposed at the bottom of the outer encapsulation shell, a first reinforcing rib is disposed on the top surface of the outer encapsulation shell, and second reinforcing ribs are disposed on both the left and right sides of the outer encapsulation shell.
[0006] Furthermore, the outer packaging shell includes a tantalum metal layer, a thickened oxide layer, and a protective plating layer. The thickened oxide layer is disposed on the outer side surface of the tantalum metal layer, and the protective plating layer is disposed on the side surface of the thickened oxide layer away from the tantalum metal layer.
[0007] Furthermore, the thickened oxide layer is formed on the surface of the tantalum metal layer using an anodic oxidation process, and a protective coating covers the entire outer surface of the thickened oxide layer.
[0008] Furthermore, the middle encapsulation housing includes a housing layer, a fiberglass layer, and a protective coating. The upper and lower surfaces of the housing layer are covered with fiberglass layers, and the surface of the fiberglass layer away from the housing layer is coated with a protective coating.
[0009] Furthermore, the shell layer is made of high-strength plastic material, and a fiberglass layer tightly covers the upper and lower sides of the shell layer.
[0010] Furthermore, the inner packaging shell is made of ceramic material, and a shielding coating covers the entire inner wall surface of the inner packaging shell, and the outer surface of the middle packaging shell is also coated with a shielding coating.
[0011] Furthermore, the base and the outer packaging shell are integrally formed, and the base and the outer packaging shell are made of the same material.
[0012] Furthermore, the first reinforcing ribs are arranged horizontally at equal intervals on the top surface of the outer packaging shell, and the second reinforcing ribs are arranged vertically at equal intervals on the side surface of the outer packaging shell. Moreover, the outer packaging shell, the first reinforcing ribs, and the second reinforcing ribs are integrally formed.
[0013] This utility model provides a tantalum capacitor housing encapsulation structure with improved mechanical strength, which has the following beneficial effects:
[0014] 1. This utility model improves the surface strength of the tantalum metal layer by forming a thickened oxide layer on the outer surface of the tantalum metal layer through anodizing, resulting in high specific volume and good mechanical strength. In addition, a protective coating is further added to the outer surface of the thickened oxide layer, which increases the wear resistance and corrosion resistance of the outer shell, thereby improving its mechanical strength. At the same time, since a base is provided at the bottom of the outer shell, and first and second reinforcing ribs are respectively provided on the top and side surfaces of the outer shell, the above three structures can effectively disperse stress and improve the overall load-bearing capacity and deformation resistance of the outer shell.
[0015] 2. This utility model, by setting a shell layer made of high-strength plastic material, with fiberglass layers on both sides and a protective coating sprayed on the outer side of the fiberglass layers, can significantly improve the mechanical strength and durability of the shell layer itself, as well as the structural strength of the fiberglass layer surface, thereby ensuring the structural strength of the entire middle layer encapsulation shell. The shell layer, together with the inner encapsulation shell made of ceramic material, utilizes the structural nesting between the two to improve the overall structure's compressive and impact resistance, giving it high strength and good mechanical properties. In addition, since a shielding coating is sprayed on the inner wall surface of the shielding coating and the outer wall surface of the middle layer encapsulation shell, the shielding coating can provide electromagnetic interference protection for the internal components as much as possible, thereby ensuring the protective effect and protective performance of the entire encapsulation structure. Attached Figure Description
[0016] Figure 1 This is a schematic diagram of the main body of a tantalum capacitor housing packaging structure for improving mechanical strength according to the present invention.
[0017] Figure 2This is a schematic diagram of the internal structure of the tantalum capacitor shell packaging structure for improving mechanical strength according to the present invention.
[0018] Figure 3 This is a cross-sectional view of the outer packaging shell of a tantalum capacitor shell packaging structure for improving mechanical strength according to the present invention.
[0019] Figure 4 This is a cross-sectional view of the middle layer of the tantalum capacitor shell encapsulation structure for improving mechanical strength according to this utility model.
[0020] In the figure: 1. Outer packaging shell; 101. Tantalum metal layer; 102. Thickened oxide layer; 103. Protective plating layer; 2. Middle packaging shell; 201. Shell layer; 202. Fiberglass layer; 203. Protective coating; 3. Inner packaging shell; 4. Shielding coating; 5. Lead frame; 6. Base; 7. First reinforcing rib; 8. Second reinforcing rib. Detailed Implementation
[0021] The embodiments of this utility model will be described in further detail below with reference to the accompanying drawings and examples. The following examples are for illustrative purposes only and should not be construed as limiting the scope of this utility model.
[0022] like Figures 1 to 4 As shown, a tantalum capacitor casing structure for improving mechanical strength includes an outer casing 1 and a middle casing 2. The middle casing 2 is disposed inside the outer casing 1, and an inner casing 3 is disposed inside the middle casing 2. The inner wall surface of the inner casing 3 is coated with a shielding coating 4. A lead frame 5 is installed on one side of the outer casing 1, a base 6 is disposed at the bottom of the outer casing 1, a first reinforcing rib 7 is disposed on the top surface of the outer casing 1, and second reinforcing ribs 8 are disposed on both the left and right sides of the outer casing 1. The outer casing 1 includes a tantalum metal layer 101, a thickened oxide layer 102, and a protective plating layer 103. A thickened oxide layer 102 is provided on the outer surface of the tantalum metal layer 101, and a protective coating 103 is provided on the outer surface of the thickened oxide layer 102 away from the tantalum metal layer 101. The thickened oxide layer 102 is formed on the surface of the tantalum metal layer 101 by anodizing, and the protective coating 103 covers the entire outer surface of the thickened oxide layer 102. By forming the thickened oxide layer 102 on the outer surface of the tantalum metal layer 101 by anodizing, the surface strength of the tantalum metal layer 101 can be improved. In addition, by further adding the protective coating 103 on the outer surface of the thickened oxide layer 102, the wear resistance and corrosion resistance of the casing can be increased.
[0023] like Figures 1 to 4As shown, the middle encapsulation shell 2 includes a shell layer 201, a fiberglass layer 202, and a protective coating 203. The upper and lower surfaces of the shell layer 201 are covered with the fiberglass layer 202, and the protective coating 203 is sprayed onto the surface of the fiberglass layer 202 away from the shell layer 201. The shell layer 201 is made of high-strength plastic material, and the fiberglass layer 202 tightly covers the upper and lower surfaces of the shell layer 201. The inner encapsulation shell 3 is made of ceramic material, and a shielding coating 4 covers the entire inner wall surface of the inner encapsulation shell 3. The outer surface of the middle encapsulation shell 2 is also sprayed with a shielding coating 4. The base 6 and the outer encapsulation shell 1 are at a distance of... The structure is integrated, and the base 6 and the outer encapsulation shell 1 are made of the same material. The first reinforcing ribs 7 are arranged horizontally at equal intervals on the top surface of the outer encapsulation shell 1, and the second reinforcing ribs 8 are arranged vertically at equal intervals on the side surface of the outer encapsulation shell 1. The outer encapsulation shell 1, the first reinforcing ribs 7 and the second reinforcing ribs 8 are integrated. By providing a shell layer 201 made of high-strength plastic material, and by providing fiberglass layers 202 on both sides of the shell layer 201, and by spraying a protective coating 203 on the outer side of the fiberglass layer 202, the mechanical strength and durability of the shell layer 201 itself can be significantly improved.
[0024] In summary, as Figures 1 to 4 As shown, the tantalum capacitor shell encapsulation structure with improved mechanical strength can effectively ensure the structural strength of the outer encapsulation shell 1 by utilizing the base 6 at the bottom of the outer encapsulation shell 1 and the first reinforcing rib 7 and the second reinforcing rib 8 set on the outer surface. It can effectively disperse stress, improve load-bearing capacity and deformation resistance. At the same time, the thickened oxide layer 102 and protective plating layer 103 on the surface of the tantalum metal layer 101 can effectively ensure the wear resistance and corrosion resistance of the tantalum metal layer 101 itself.
[0025] The middle encapsulation shell 2 inside the outer encapsulation shell 1, wherein the shell layer 201 utilizes the glass fiber layer 202 and protective coating 203 on both sides to effectively ensure the overall mechanical strength and durability of the middle encapsulation shell 2 itself. In addition, the inner encapsulation shell 3, together with the shielding coating 4, can avoid external electromagnetic interference while also ensuring the structure's resistance to pressure and impact.
[0026] The embodiments of this utility model are given for illustrative and descriptive purposes only, and are not intended to be exhaustive or to limit the utility model to the forms disclosed. Many modifications and variations will be apparent to those skilled in the art. The embodiments were chosen and described in order to better illustrate the principles and practical applications of this utility model, and to enable those skilled in the art to understand this utility model and design various embodiments with various modifications suitable for a particular purpose.
Claims
1. A tantalum capacitor casing encapsulation structure for improving mechanical strength, comprising an outer encapsulation shell (1) and a middle encapsulation shell (2), characterized in that: The outer packaging shell (1) has a middle packaging shell (2) inside, and the middle packaging shell (2) has an inner packaging shell (3) inside. The inner wall surface of the inner packaging shell (3) is coated with a shielding coating (4). A lead frame (5) is installed on one side of the outer packaging shell (1). A base (6) is provided at the bottom of the outer packaging shell (1). A first reinforcing rib (7) is provided on the top surface of the outer packaging shell (1). A second reinforcing rib (8) is provided on both the left and right sides of the outer packaging shell (1).
2. The tantalum capacitor casing encapsulation structure for improving mechanical strength according to claim 1, characterized in that, The outer packaging shell (1) includes a tantalum metal layer (101), a thickened oxide layer (102), and a protective plating layer (103). The thickened oxide layer (102) is provided on the outer side surface of the tantalum metal layer (101), and the protective plating layer (103) is provided on the side surface of the thickened oxide layer (102) away from the tantalum metal layer (101).
3. The tantalum capacitor casing encapsulation structure for improving mechanical strength according to claim 2, characterized in that, The thickened oxide layer (102) is formed on the surface of the tantalum metal layer (101) by anodizing, and the protective coating (103) covers the entire outer surface of the thickened oxide layer (102).
4. The tantalum capacitor casing encapsulation structure for improving mechanical strength according to claim 1, characterized in that, The middle layer encapsulation shell (2) includes a shell layer (201), a fiberglass layer (202) and a protective coating (203). The upper and lower surfaces of the shell layer (201) are covered with the fiberglass layer (202), and the surface of the fiberglass layer (202) away from the shell layer (201) is coated with the protective coating (203).
5. A tantalum capacitor housing encapsulation structure for improving mechanical strength according to claim 4, characterized in that, The shell layer (201) is made of high-strength plastic material, and the fiberglass layer (202) tightly covers the upper and lower sides of the shell layer (201).
6. The tantalum capacitor casing encapsulation structure for improving mechanical strength according to claim 1, characterized in that, The inner encapsulation shell (3) is made of ceramic material, and the shielding coating (4) covers the entire inner wall surface of the inner encapsulation shell (3). The outer surface of the middle encapsulation shell (2) is also coated with the shielding coating (4).
7. The tantalum capacitor housing encapsulation structure for improving mechanical strength according to claim 1, characterized in that, The base (6) and the outer packaging shell (1) are integrally structured, and the base (6) and the outer packaging shell (1) are made of the same material.
8. The tantalum capacitor casing encapsulation structure for improving mechanical strength according to claim 1, characterized in that, The first reinforcing rib (7) is arranged horizontally at equal intervals on the top surface of the outer packaging shell (1), and the second reinforcing rib (8) is arranged vertically at equal intervals on the side surface of the outer packaging shell (1). The outer packaging shell (1), the first reinforcing rib (7) and the second reinforcing rib (8) are integrally formed.