Metallized film
By setting folded portions and edge areas on the metallized thin film, the problem of small contact area during the gold spraying process is solved, the contact resistance is reduced, and the electrical performance of the capacitor is improved.
Patent Information
- Application Number
- CN202423135662.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-19
- Publication Date
- 2025-12-02
- Estimated Expiration
- 2034-12-19
AI Technical Summary
Existing metallized thin films have a small contact area during the gold sputtering process, resulting in a large contact resistance and affecting capacitor performance.
One end of the base film, along with the metal layer, is folded away from the metal layer to form a folded portion. An edge area is provided between the other end of the metal layer and the inner end of the folded portion. The metal layer is made of aluminum and covers the outer end of the folded portion to increase the contact area between the gold plating layer and the metal layer.
By increasing the contact area between the gold plating layer and the metal layer, the contact resistance is reduced, thereby improving the electrical performance of the capacitor.
Smart Images
Figure CN223624828U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of thin film technology, and in particular to a metallized thin film. Background Technology
[0002] Film capacitors are characterized by non-polarity, high insulation resistance, and high energy density. The core of a film capacitor is made by winding a metallized film. In existing technologies, metallized films are typically formed by depositing a metal layer on one side of a base film. The width of the metal layer is smaller than the width of the base film, with one end of the metal layer flush with one end of the base film, and the other end forming a margin area. Two metallized film layers are then stacked together with opposite width orientations and the same thickness orientation to form a metallized film pair. The margin areas on these two metallized film layers are located at opposite ends of the width of the metallized film pair. After winding the metallized film pair into a core, gold plating is applied to both ends of the core. During gold plating, since only the end faces of the metallized film are in contact with the gold plating layer, and the metal layer is relatively thin with many pores, the contact area is small, resulting in a relatively high contact resistance. Utility Model Content
[0003] The technical problem to be solved by this utility model is to provide a metallized thin film in response to the above-mentioned technical deficiencies.
[0004] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is: a metallized thin film, including a base film, a metal layer disposed on one side of the base film, and one end of the base film, together with the metal layer, is folded away from the side where the metal layer is disposed to form a folded portion, and the end of the metal layer away from the folded portion is flush with the end of the base film.
[0005] To further optimize this technical solution, a margin area is provided between the other end of the metal layer and the inner end of the folded portion.
[0006] To further optimize this technical solution, the material of the metal layer is aluminum.
[0007] Compared with the prior art, the present invention has the following advantages: one end of the base film, along with the metal layer, is folded away from the side where the metal layer is located to form a folded part, and the outer end of the folded part is covered by the metal layer, thereby making the contact area between the gold layer and the metal layer larger after the core is sputtered with gold, thus reducing the contact resistance. Attached Figure Description
[0008] Figure 1 This is a schematic diagram of the structure of a metallized thin film.
[0009] Figure 2 This is a schematic diagram of the structure of the metallized thin film of this application before folding.
[0010] Figure 3 This is a schematic diagram of the structure of a metallized thin film pair.
[0011] Figure 4 This is a schematic diagram showing the state of adjacent metallized film pairs after they have been wound into a core.
[0012] In the diagram: 1. Base film; 11. Edge area; 2. Metal layer; 3. Folded section. Detailed Implementation
[0013] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to specific embodiments and accompanying drawings. It should be understood that these descriptions are merely exemplary and not intended to limit the scope of this utility model. Furthermore, descriptions of well-known structures and technologies are omitted in the following description to avoid unnecessarily obscuring the concept of this utility model.
[0014] Detailed implementation method: combined with Figure 1-4 As shown, a metallized thin film includes a base film 1, a metal layer 2 disposed on one side of the base film 1, and one end of the base film 1, along with the metal layer 2, is folded away from the side where the metal layer 2 is disposed to form a folded portion 3. Two base film layers 1 are bonded together at the folded portion 3. The end of the metal layer 2 away from the folded portion 3 is flush with the end of the base film 1. The outer end of the folded portion 3 (i.e., the...) Figure 1 The left end of the middle section is covered with a metal layer 2. It can be produced first. Figure 2 The metallized thin film in the middle, and then the metallized thin film in the middle. Figure 2 The metallized film of this application is obtained by folding the left end of the metallized film in the middle. The metallized films of this application are stacked together with opposite orientations in the width direction and the same orientation in the thickness direction, and one end of the metallized film away from the folded portion 3 is located inside the inner end of the folded portion 3 on the other metallized film, forming Figure 3 The metallized film pair shown; then... Figure 3 The metallized film pairs shown are wound into a core, and the state of two adjacent metallized film pairs after winding into a core is as follows. Figure 4 As shown. From Figure 4 As can be seen, since the metal layer 2 covers the outer end of the folded part 3, the contact area between the gold layer and the metal layer 2 is large after gold spraying, which reduces the contact resistance.
[0015] The other end of the metal layer 2 can be connected to the inner end of the folded portion 3 (i.e. Figure 1 The right end of the folded part 3 is flush with the middle part 3. Figure 3 As can be seen, the metal layer 2 at the right end of the upper metallized film is located below it, while the inner end of the folded portion 3 of the lower metallized film (i.e., Figure 3The metal layer 2 at the left end of the folding portion 3 is located on the upper side of the folding portion 3, so the metal layers 2 on both can be in a non-contact state; to further improve reliability, it is preferable that the other end of the metal layer 2 is connected to the inner end of the folding portion 3 (i.e., the metal layer 2 at the left end of the folding portion 3). Figure 1 If the right end of the folded portion 3 is not flush, a margin area 11 is provided between the other end of the metal layer 2 and the inner end of the folded portion 3. The presence of the margin area 11 makes it more difficult for the metal layers 2 on the two metallized films to come into contact, thus making it less likely to short circuit.
[0016] The metal layer 2 is made of aluminum. Aluminum is suitable for evaporation deposition process to form the metal layer 2.
[0017] It should be understood that the specific embodiments described above are merely illustrative or explanatory of the principles of this utility model and do not constitute a limitation thereof. Therefore, any modifications, equivalent substitutions, improvements, etc., made without departing from the spirit and scope of this utility model should be included within its protection scope. Furthermore, the appended claims are intended to cover all variations and modifications falling within the scope and boundaries of the appended claims, or equivalent forms of such scope and boundaries.
Claims
1. A metallized thin film, comprising a base film (1), wherein a metal layer (2) is disposed on one side of the base film (1), characterized in that: One end of the base film (1) is connected to the metal layer (2) and folded away from the side where the metal layer (2) is provided to form a folded portion (3). The end of the metal layer (2) away from the folded portion (3) is flush with the end of the base film (1).
2. The metallized thin film according to claim 1, characterized in that: A margin area (11) is provided between the other end of the metal layer (2) and the inner end of the folded portion (3).
3. A metallized thin film according to any one of claims 1-2, characterized in that: The metal layer (2) is made of aluminum.