CN201829440U - Slow fusion type surface mounted fuse - Google Patents
Slow fusion type surface mounted fuse Download PDFInfo
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- CN201829440U CN201829440U CN2010205513523U CN201020551352U CN201829440U CN 201829440 U CN201829440 U CN 201829440U CN 2010205513523 U CN2010205513523 U CN 2010205513523U CN 201020551352 U CN201020551352 U CN 201020551352U CN 201829440 U CN201829440 U CN 201829440U
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Abstract
The utility model discloses a slow fusion type surface mounted fuse, which comprises a glass-ceramic matrix, a fuse wire arranged in the glass-ceramic matrix and metal end electrodes arranged at the two ends of the glass-ceramic matrix. The fuse comprises a plurality of fuse wire units arranged in parallel, and the two ends of each fuse wire unit are respectively connected with the metal end electrodes. The slow fusion type surface mounted fuse has small size and high power. The structure with the fuse wire units arranged in parallel can help to diffuse energy during overloading, thus the energy density is reduced, and fusion safety of the fuse can be ensured; simultaneously, the manufacturing process of each fuse wire unit can not be affected by fuse wires on other layers, and the product has good consistency of quality; and the fuse also has good pulse resistance and high breaking capacity.
Description
Technical field
The utility model belongs to circuit protection and uses the fuse field, the disconnected slowly surface mounting fuse protector of particularly a kind of novel high-power.
Background technology
Current, the route protection element is applied in increasing circuit board, and wherein overflow protecting element can effectively reduce the damage of overcurrent to element device and user, and one of element that this overcurrent protection function is provided is a surface mounting fuse protector.Because of surface mounting fuse protector can adopt identical packaging technology to be assembled on the circuit board with elements such as plate resistor, electric capacity, inductance, so its application spreads all over communication apparatus, computer, audio-visual equipment and supply convertor etc.Along with the progressively expansion of application, the series of surface mounting fuse protector is divided also initial fast disconnected type, disconnected type derives types such as anti-high surge, big electric current slowly.But surface mounting fuse protector is limited by the size of himself and the strength of materials, the difficult disconnected slowly type fuse products of producing high-power high rated current.
A kind of method of making fuse on FR4 epoxy resin substrate is provided among the Chinese invention patent ZL95193295.0 " surface-mounted fuse device ", the method can be made the fuse of small size (EIA0603 and EIA0402 etc.), low cold-state resistance, but its linear fuse fuses under the condition of overload current comparatively fast, can't realize fusing at a slow speed.
Provide a kind of snakelike fuse-wires structure among the Chinese invention patent ZL97196373.8 " surface mounting fuse protector and manufacture method thereof ", this structure can effectively improve the area of dissipation of fuse, the heat that makes fuse produce when overload can in time distribute towards periphery, and then can bear bigger pulse shock under the high overload condition.But the method can only be made fuse at substrate surface, and can't make the multilayer fuse-wires structure, makes the rated current of fuse be very limited, and can't make the disconnected slowly type surface mounting fuse protector that EIA0603 size rated current surpasses 5A at present with the method; Simultaneously, because of fuse can only be produced on substrate surface, the arc extinction performance of fuse failure its surrounding medium of moment is relatively poor, and there is certain potential safety hazard in the arcing that flashes.
A kind of multilayer tablet fuse is disclosed among the China utility model patent ZL200820217547.7; it comprises ceramic substrate, back electrode, face electrode, fuse; protective layer and metal termination; wherein fuse is a multilayer; the adjacent layer fuse is end to end successively; the two ends of fuse of joining is joined matcoveredn on every layer of fuse with the face electrode of substrate both sides respectively.The fuse of this structure is to adopt the fuse that printing one deck is connected with the face electrode on ceramic substrate; on electrode, print protective layer then; on protective layer, print fuse again; so alternately printing; realize that the adjacent layer fuse joins end to end, two terminations of the fuse that links to each other are connected with the face electrode of substrate both sides respectively.This structure can realize the cascaded structure of multilayer fuse, and advantage is the area of dissipation that effectively raises fuse, can realize the characteristic that fuse fuses at a slow speed; Shortcoming is the fuse-wires structure complex process of alternative expression, and every layer of fuse all needs just can finish through super-dry, sintering process.Simultaneously, because of adjacent layer fuse therebetween matcoveredn, protective layer make and sintering after consistency will be to upper strata fuse-wires structure and adjacent fuse be connected the generation considerable influence.Though this method can realize the multilayer fuse-wires structure, its complex process, the difficult disconnected slowly type fuse of realizing high-power high rated current, low cold-state resistance.
Summary of the invention
Technical problem to be solved in the utility model is to overcome the deficiencies in the prior art, and a kind of improved disconnected slowly type surface mounting fuse protector is provided, and its preparation technology is simple, fail safe good.
For solving above technical problem, the utility model is taked following technical scheme:
A kind of disconnected slowly type surface mounting fuse protector, it comprises glass-ceramic substrate, is arranged on fuse in the glass-ceramic substrate and the metal end electrode that is arranged on the glass-ceramic substrate both ends, wherein, described fuse is made of a plurality of fuse cells that are arranged parallel to each other, and the both ends of each fuse cell are connected with the metal end electrode respectively.
Preferably, described a plurality of fuse cell distributes along the short transverse of glass-ceramic substrate.The shape of fuse cell or pattern are preferably nonlinear type and comprise at least two more than or equal to 90 ° bending section.For example fuse cell can for snakelike or other shape to improve area of dissipation.The shape of a plurality of fuse cells can be identical or different, and is preferably identical.
Described metal end electrode can be a three-decker well known in the art; the i.e. metallic silver layer that sets gradually from the end from-inner-to-outer of fuse cell, protection nickel dam and tin layer; each fuse cell is connected closely with glass-ceramic substrate, metal end electrode, the product reliability height.
Because the employing of technique scheme, the utility model compared with prior art has the following advantages:
The utility model fuse adopts the mode of a plurality of fuse cell parallel connections, has improved the contact area of fuse and surrounding matrix material, realizes heat dispersion preferably; And because of basis material on every side has stronger arc extinction performance, the moment that makes the fuse failure starting the arc, electric arc can be realized the purpose of moment arc extinguishing rapidly by absorbed on every side, thereby has improved the high-power breaking capacity and the fail safe of disconnected miniature surface-adhered fuse slowly.In addition, the fuse cell in the fuse of employing the utility model structure can adopt the once sintered moulding of mode of common burning with glass-ceramic substrate, and preparation technology is simple, and is with low cost.
Description of drawings
Below in conjunction with accompanying drawing and specific embodiment, the utility model is described in more detail:
Fig. 1 is the schematic perspective view of embodiment 1 fuse;
Fig. 2 looks cross-sectional schematic for the master of embodiment 1 fuse;
Fig. 3 is the schematic top plan view of the fuse cell of embodiment 1 fuse;
Fig. 4 is the manufacture craft flow chart of the blank body of embodiment 1 fuse;
Fig. 5 is the schematic top plan view of the fuse cell of embodiment 2 fuses;
Fig. 6 is the schematic top plan view of the fuse cell of embodiment 3 fuses;
Fig. 7 is the schematic top plan view of the fuse cell of embodiment 4 fuses;
Wherein: 1, glass-ceramic substrate; 10, lower-glass ceramic matrix; 11, upper glass ceramic matrix; 12, intermediate glass ceramic matrix; 2, fuse; 20, fuse cell; 21, fuse cell layer; 3, metal end electrode; 30, silver layer; 31, nickel dam; 32, tin layer; 4, loading plate.
Embodiment
As shown in Figure 1, 2, the fuse of present embodiment comprises glass-ceramic substrate 1, fuse 2 and the metal end electrode 3 that is connected glass-ceramic substrate 1 two ends, wherein fuse 2 is made of two fuse cells that are parallel to each other 20 that the short transverse along glass-ceramic substrate 1 distributes, and the both ends of each fuse cell 20 are connected with the silver layer 31 of metal end electrode 3 respectively.Referring to Fig. 3, the shape of two fuse cells 20 is identical, and is snakelike, and has bending section greater than two 90 °.
For ease of purpose of description, the green compact that cut the upper glass ceramic matrix layer 11 of fuse cell 20 tops in the blank that separates the back are defined as " going up green layer ", the green compact that are positioned at the lower-glass ceramic matrix layer 10 of fuse cell 20 belows are defined as " following green layer ", will be defined as " middle green layer " at the green compact of the intermediate glass ceramic matrix layer 12 between two fuse cells 20.Below introduce in detail the manufacture craft of fuse with this structure.
Manufacture craft according to the fuse of present embodiment comprises the steps:
(1), make the blank body:
The mode of a, employing coating on loading plate 4 is made certain thickness first adhesive of uV curable and first slurry of glass ceramics powder of having, and this first slurry of ultra-violet curing forms down green layer 10 (seeing Fig. 4 (a));
The mode printing of b, employing silk screen printing on lower-glass ceramic matrix 11 is contained second adhesive of uV curable and second slurry of silver or silver alloy powder, and is snakelike fuse cell layer 21 (seeing 4 (b)) by ultraviolet light polymerization formation;
C, on fuse cell layer 21 coating certain thickness first slurry, and green layer 12 in the middle of forming by ultraviolet light polymerization, middle green layer 12 will be in down green layer 10 and fuse cell layer 21 form the integral body (seeing 4 (c)) with certain adhesion in solidification process;
The mode of d, employing silk screen printing on middle green layer 12 is printed second slurry, and form snakelike fuse cell layer 21 by ultraviolet light polymerization, the shape of this fuse cell layer 21 is identical with the shape of above-mentioned fuse cell layer 21, so that be evenly distributed the loaded current (see 4 (ds)) of two-layer fuse when work;
E, on fuse cell layer 20 coating certain thickness first slurry, and form green layer 11 by ultraviolet light polymerization, fuse cell layer 21 and middle green layer 12 that this last green layer 11 is in contact with it form the integral body with certain adhesion, so far obtain green compact (seeing Fig. 4 (e));
F, green compact are cut into single product through cutting process, then with single product from loading plate 4 peel off the blank body;
(2), adopt binder removal well known to those skilled in the art and sintering circuit, first adhesive and second adhesive that contain in the removal blank body, the base substrate that formation glass-ceramic substrate and multilayer fuse are combined closely.
(3), adopt the silver process of being stained with of the sheet capacitor know in the industry, resistance, conductive silver paste is stained with at the base substrate two ends, and through super-dry, sintering process, termination electrode silver layer 30 is realized closely being connected with the two ends of the snakelike fuse cell 20 of base substrate inside, pass through electronickelling and electrotinning technology then, outside termination electrode silver layer 30, form electroless nickel layer 31 and tin layer 32, as shown in Figure 2.
Present embodiment can be realized the high-power disconnected slowly type surface mounting fuse protector of small size, adopts the structure of snakelike fuse Multi-layer Parallel to help energy dissipation when overload, has reduced energy density, can guarantee fuse blows safety; Simultaneously, the manufacturing process of every layer of fuse is not influenced by other layers fuse, the high conformity of product quality; And, have arc extinction performance preferably behind the first slurry sintering, make this miniature surface-adhered fuse have anti-preferably pulse ability and higher breaking capacity.
Substantially with embodiment 1, different is the bigger serpentine shaped of being shaped as of fuse cell 20 surface area shown in Figure 5 according to the result of the fuse of present embodiment.
Embodiment 3
Substantially with embodiment 1, different is being shaped as of fuse cell 20 transverse curvature shape shown in Figure 6 according to the result of the fuse of present embodiment.
Substantially with embodiment 1, different is being shaped as of fuse cell 20 shape shown in Figure 7 according to the result of the fuse of present embodiment.
Adopt the structure and the manufacture craft of the foregoing description 1 to make 0603SB-5A, 0603SB-8A product.Because of the high-power maximum rated current of disconnected miniature surface-adhered fuse slowly of present EIA0603 size on the market is 5A, no 8A product, so the 0603SB-5A and the traditional product of making of the foregoing description 1 can only be carried out the electrical property contrast, and can only under the prerequisite of the test index identical, enumerate test result with above-mentioned test employing according to the 0603SB-8A product that the utility model is made.Concrete outcome is referring to the table 1 of the 6th page in this specification.
As seen from Table 1, this rated current is that 2 times of rated current overload of fuse of 5A and 10 times of rated current overload fusing times are all slow than the tradition type fuse blows of breaking slowly, this explanation adopts the fuse structure of utility model to have heat dissipation environment preferably, under the pulse test condition of identical energy, fuse of the present utility model can bear bigger pulse shock.Simultaneously, the rated current that adopts the utility model to make is the disconnected slowly type fuse of 8A, and segmented current can be up to 80A under the 32Vdc condition for it, and this multilayer fuse-wires structure that has also demonstrated fully the utility model fuse has arc extinction performance preferably.
The foregoing description only is explanation technical conceive of the present utility model and characteristics; its purpose is to allow the personage who is familiar with this technology can understand content of the present utility model and enforcement according to this; can not limit protection range of the present utility model with this; all equivalences of being done according to the utility model spirit change or modify, and all should be encompassed within the protection range of the present utility model.
Claims (7)
1. disconnected slowly type surface mounting fuse protector, comprise glass-ceramic substrate (1), be arranged on fuse (2) in the described glass-ceramic substrate (1) and the metal end electrode (3) that is arranged on described glass-ceramic substrate (1) both ends, it is characterized in that: described fuse (2) is made of a plurality of fuse cells (20) that are arranged parallel to each other, and the both ends of each described fuse cell (20) are connected with described metal end electrode (3) respectively.
2. disconnected slowly type surface mounting fuse protector according to claim 1, it is characterized in that: described a plurality of fuse cells (20) distribute along the short transverse of described glass-ceramic substrate (1).
3. disconnected slowly type surface mounting fuse protector according to claim 2, it is characterized in that: described fuse cell (20) is a nonlinear type.
4. disconnected slowly type surface mounting fuse protector according to claim 3 is characterized in that: described fuse cell (20) comprises at least two more than or equal to 90 ° bending section.
5. disconnected slowly type surface mounting fuse protector according to claim 3, it is characterized in that: described fuse cell (20) is for snakelike.
6. according to claim 1 or 3 described disconnected slowly type surface mounting fuse protectors, it is characterized in that: the shape of a plurality of described fuse cells (20) is identical or different.
7. disconnected slowly type surface mounting fuse protector according to claim 1 is characterized in that: described termination electrode comprises the silver layer (30) that is connected with the end of described glass-ceramic substrate (1) and described fuse cell (20), electroplates the tin layer (32) on described nickel dam (31) outer surface at nickel dam (31) on described silver layer (30) outer surface and plating.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205513523U CN201829440U (en) | 2010-10-08 | 2010-10-08 | Slow fusion type surface mounted fuse |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205513523U CN201829440U (en) | 2010-10-08 | 2010-10-08 | Slow fusion type surface mounted fuse |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201829440U true CN201829440U (en) | 2011-05-11 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010205513523U Expired - Lifetime CN201829440U (en) | 2010-10-08 | 2010-10-08 | Slow fusion type surface mounted fuse |
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| CN (1) | CN201829440U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101950715A (en) * | 2010-10-08 | 2011-01-19 | Aem科技（苏州）有限公司 | Slow-break surface-mount fuse and manufacturing process thereof |
| CN102646558A (en) * | 2012-05-10 | 2012-08-22 | 苏州晶讯科技股份有限公司 | High pressure resistant surface mounted fuse |
| JP7393483B2 (en) | 2022-04-27 | 2023-12-06 | 功得電子工業股▲分▼有限公司 | Easy to assemble fuse |
-
2010
- 2010-10-08 CN CN2010205513523U patent/CN201829440U/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101950715A (en) * | 2010-10-08 | 2011-01-19 | Aem科技（苏州）有限公司 | Slow-break surface-mount fuse and manufacturing process thereof |
| CN102646558A (en) * | 2012-05-10 | 2012-08-22 | 苏州晶讯科技股份有限公司 | High pressure resistant surface mounted fuse |
| CN102646558B (en) * | 2012-05-10 | 2014-07-09 | 苏州晶讯科技股份有限公司 | High pressure resistant surface mounted fuse |
| JP7393483B2 (en) | 2022-04-27 | 2023-12-06 | 功得電子工業股▲分▼有限公司 | Easy to assemble fuse |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20110511 |
|
| CX01 | Expiry of patent term |