阅读说明：本技术 一种薄膜型熔断器及制造方法 (Thin film type fuse and manufacturing method thereof ) 是由 杨漫雪 邓琪 于 2019-11-06 设计创作，主要内容包括：本发明公开了一种薄膜型熔断器，包括基体、熔断体、电极；所述熔断体为金属片形并贴合在基体上，熔断体即便较为微型，基体也能够作为熔断体的支撑，使熔断体的形状加工易控制，可以精确控制熔体厚度和图形，从而实现更小电流规格的熔断器的制造。且制造该熔断器的制造方法简单可行，通过简单薄膜工艺即可完成。(The invention discloses a thin film type fuse, which comprises a substrate, a fuse link and an electrode, wherein the substrate is provided with a plurality of fuse holes; the fuse link is in a metal sheet shape and is attached to the base body, even if the fuse link is miniature, the base body can also be used as a support of the fuse link, so that the shape processing of the fuse link is easy to control, the thickness and the pattern of a fused mass can be accurately controlled, and the manufacturing of the fuse with smaller current specification is realized. The manufacturing method for manufacturing the fuse is simple and feasible, and can be completed through a simple thin film process.)

1. A thin film type fuse includes a base, a fuse body, and an electrode; the metal sheet-shaped fuse link is characterized in that one surface of the base body is covered with an insulating layer, one surface of the insulating layer is attached to the base body, the other surface of the insulating layer is attached to the metal sheet-shaped fuse link, two ends of the surface, back to the insulating layer, of the fuse link are respectively covered with an electrode, and a protective layer covers the part, between the electrodes, of the surface, back to the insulating layer, of the fuse link.

2. A thin film type fuse as set forth in claim 1, wherein: the electrode is a copper electrode, the outer layer of the copper electrode is covered with a nickel electrode, and the outer layer of the nickel electrode is covered with a tin electrode.

3. The thin film type fuse as claimed in claim 1 or 2, wherein: the base body is a ceramic substrate.

4. A thin film type fuse as set forth in claim 3, wherein: the insulating layer is made of glass or high-temperature-resistant glass resin.

5. A method of manufacturing a thin film type fuse, comprising the steps of:

(a) and forming a fuse link: taking a double-layer metal sheet, wherein one layer is used as a fuse body layer, and the other layer is used as an electrode layer, and processing the fuse body layer into a required fuse body pattern;

(b) and forming an insulating layer: taking the double-layer metal sheet which is subjected to fuse link forming, and forming an insulating layer on one surface of a silver layer of the double-layer metal sheet by adopting a printing process;

(c) and base body bonding: taking the double-layer metal sheet which is subjected to the insulating layer forming, attaching a layer of prepreg to one surface of the insulating layer, and attaching a substrate to the prepreg;

(d) and forming a matrix: heating the material which finishes the base body bonding under the condition of continuous pressurization to finish curing of the prepreg, and bonding the double-layer metal sheet and the base body;

(e) etching the electrode layer; processing electrode layer surface of the above-mentioned material for forming base body, etching pattern in the middle portion of electrode layer to divide the electrode layer into two electrodes, said two electrodes are mutually independent and respectively cover two ends of same surface of fuse-melting body layer, utilizing the operation of etching required pattern from electrode layer to expose pattern portion of fuse-melting body layer,

(f) and processing a melting point: adhering the material which finishes the etching of the electrode layer and exposes the pattern part of the fusing body layer to a dry film, aligning and exposing to obtain a preset fusing point, exposing the preset fusing point through a developing process, plating a layer of tin at the position of the preset fusing point through a tin plating process, and removing the dry film of other parts;

(g) and forming a protective layer: printing a protective layer on the surface of the fuse link layer of the semi-finished product with the processed fuse link point, wherein the protective layer completely covers the fuse link pattern and the fuse link point, and the protective layer is exposed out of the end face of the copper layer serving as a fuse link electrode;

(h) and forming an electrode: and carrying out surface treatment on the semi-finished product in an electroplating mode, and finally forming an electrode at the position of the electrode.

6. The manufacturing method according to claim 5, characterized in that: in the step (a), the double-layer metal sheet is a silver layer and a copper layer, the silver layer is used as a fusing body layer, and the copper layer is used as an electrode layer; in the step (b), the insulating layer is glass or high-temperature resistant glass resin.

7. The manufacturing method according to claim 5 or 6, characterized in that: and processing the fuse body layer into a required fuse body pattern by adopting a laser process or an etching process.

8. The manufacturing method according to claim 6, characterized in that: in the step (h), the electrode is formed at the electrode position, namely, a nickel electrode covers the copper electrode, and the outer layer of the nickel electrode covers the tin electrode.

9. The manufacturing method according to claim 5, characterized in that: the double-layer metal sheet is processed into a semi-finished product material with an array structure through the steps (a) to (g) by using an array structure, and is divided to form a single fuse semi-finished product, and then the electrode forming is carried out through the step (h).

Technical Field

The invention belongs to the field of overcurrent and overvoltage protection elements, and particularly relates to a thin film type surface-mounted fuse for overcurrent and overvoltage protection and a manufacturing method of the fuse.

Background

With the vigorous development of emerging industries such as electric automobiles and the like, the control requirement of a battery equalization system is higher and higher, and the demand on a low-current fuse with high energy division capacity and capable of quickly reacting is more and more.

Fuses are typically fabricated using thick film process printing or PCB thin film process etching for package sizes of 1206 or less. However, the thick film process fuse printing of fuses below 10 microns is difficult, and the rated current specification below 1A meeting the market requirement is difficult to achieve; and the PCB film process is difficult to meet the requirements of vehicle-mounted applications.

Therefore, a new technical solution is needed to solve the above problems.

Disclosure of Invention

The purpose of the invention is as follows: the present invention provides a thin film type fuse which is easy to manufacture.

The invention also provides a manufacturing method, which can manufacture the thin film type fuse meeting the market requirement and having the rated current specification of below 1A.

The technical scheme is as follows: in order to achieve the purpose, the automatic climbing walking trolley can adopt the following technical scheme:

a thin film type fuse includes a base, a fuse body, and an electrode; one surface of the substrate is covered with an insulating layer, one surface of the insulating layer is attached to the substrate, the other surface of the insulating layer is attached to the metal sheet-shaped fuse link, two ends of the surface of the fuse link, back to the insulating layer, are respectively covered with electrodes, and a part of the surface of the fuse link, back to the insulating layer, between the electrodes at the two ends is covered with a protective layer.

Has the advantages that:

the fuse link is in a metal sheet shape and is attached to the substrate, and even if the fuse link is miniature, the substrate can be used as a support of the fuse link, so that the shape processing of the fuse link is easy to control, the thickness and the pattern of a melt can be accurately controlled, and the manufacture of the fuse with smaller current specification is realized.

The manufacturing method of the thin film type fuse provided by the invention can adopt the following technical scheme, and comprises the following steps:

(a) and forming a fuse link: taking a double-layer metal sheet, wherein one layer is used as a fuse body layer, and the other layer is used as an electrode layer, and processing the fuse body layer into a required fuse body pattern;

(b) and forming an insulating layer: taking the double-layer metal sheet which is subjected to fuse link forming, and forming an insulating layer on one surface of a silver layer of the double-layer metal sheet by adopting a printing process;

(c) and base body bonding: taking the double-layer metal sheet which is subjected to the insulating layer forming, attaching a layer of prepreg to one surface of the insulating layer, and attaching a substrate to the prepreg;

(d) and forming a matrix: heating the material which finishes the base body bonding under the condition of continuous pressurization to finish curing of the prepreg, and bonding the double-layer metal sheet and the base body;

(e) etching the electrode layer; processing electrode layer surface of the above-mentioned material for forming base body, etching pattern in the middle portion of electrode layer to divide the electrode layer into two electrodes, said two electrodes are mutually independent and respectively cover two ends of same surface of fuse-melting body layer, utilizing the operation of etching required pattern from electrode layer to expose pattern portion of fuse-melting body layer,

(f) and processing a melting point: adhering the material which finishes the etching of the electrode layer and exposes the pattern part of the fusing body layer to a dry film, aligning and exposing to obtain a preset fusing point, exposing the preset fusing point through a developing process, plating a layer of tin at the position of the preset fusing point through a tin plating process, and removing the dry film of other parts;

(g) and forming a protective layer: printing a protective layer on the surface of the fuse link layer of the semi-finished product with the processed fuse link point, wherein the protective layer completely covers the fuse link pattern and the fuse link point, and the protective layer is exposed out of the end face of the copper layer serving as a fuse link electrode;

(h) and forming an electrode: and carrying out surface treatment on the semi-finished product in an electroplating mode, and finally forming an electrode at the position of the electrode. .

Has the advantages that: compared with the prior art, the manufacturing method provided by the invention has the following advantages,

1. the manufacturing method is simple and feasible and can be completed through a simple film process.

2. The processing of the fuse link is easy to control, the thickness and the pattern of the fuse link can be accurately controlled, so that the manufacturing of the fuse with smaller current specification is realized, and the thin film type fuse with the rated current specification below 1A meeting the market demand can be manufactured.

3. The fuse manufactured by the method can realize small rated current and can quickly react, and simultaneously meets the requirement of high breaking capacity.

Drawings

FIG. 1 is a schematic sectional view of a thin film type fuse in the present invention.

FIG. 2 is a schematic diagram of a two-layer metal sheet bonded to a substrate via a prepreg according to the present invention.

Detailed Description

Referring to fig. 1 and 2, the present embodiment discloses a thin film fuse, which includes a base 1 (ceramic substrate), a metal sheet-shaped fuse link 3, and an electrode 4. The electrode 4 is a copper electrode, the outer layer of the copper electrode 4 is covered with a nickel electrode 5, and the outer layer of the nickel electrode 5 is covered with a tin electrode 6. One surface of the substrate is covered with an insulating layer 2. One surface of the insulating layer 2 is bonded to the base 1 and the other surface is bonded to the metal sheet fuse element 3. Two ends of the surface of the fuse link 3, which are back to the insulating layer, are respectively covered with electrodes 4, and the part of the surface of the fuse link 3, which is back to the insulating layer 2, between the two end electrodes is covered with a protective layer 7. The insulating layer 2 is made of glass or high-temperature-resistant glass resin. Since the fuse link 3 can be supported by the base 1 after assembly, the fuse link layer can be processed to a desired pattern of the fuse link 3 by a laser process or an etching process, thereby enabling the manufacture of fuses of smaller current specifications (smaller cross-section of the fuse link).