CN202796291U

CN202796291U - High-power resistor

Info

Publication number: CN202796291U
Application number: CN 201220375722
Authority: CN
Inventors: 童卫东
Original assignee: SICHUAN QIXING ELECTRONICS CO Ltd
Current assignee: SICHUAN QIXING ELECTRONICS CO Ltd
Priority date: 2012-07-31
Filing date: 2012-07-31
Publication date: 2013-03-13
Anticipated expiration: 2022-07-31

Abstract

The utility model provides a high-power resistor. The high-power resistor comprises a resistive basal body, wherein a radiator and a resistive film layer are respectively arranged on the upper surface and the lower surface of the resistive basal body, primary electrodes are sintered on two ends of the top surface of the resistive film layer, secondary electrodes are further sintered on two ends of the bottom surface of the resistive film layer, and leading-out terminals are respectively arranged at two ends of the secondary electrodes. The high-power resistor has the advantages that after the structure is adopted, the secondary electrodes are covered on the resistive film layer, so that the resistive film layer and the electrodes are in double-sided contact, thereby increasing the contact area, reducing the contact resistance, and further greatly reducing the breakdown and burning risks at the lapped positions, so that the load resistance capability of the resistor is enhanced.

Description

Power Resistor

Technical field

The utility model relates to a kind of Power Resistor.

Background technology

What existing thick-film resistor used is the technology that then silk screen printing uses the high temperature sintering polymerization, electronics is to form electrode at ceramic matrix first, and then printing, the sintering resistive layer, between two different rete interfaces, just will inevitably there be an overlapping part, form one at this simultaneously and have other contact resistance of ohm level, if adopt this traditional one-step print, once sintered method, because resistive layer is that single face contacts with electrode, contact area is less, when having instantaneous large-current to mix resistive layer by electrode, will be excessive and breakdown owing to possessing load in lap-joint, burn, thereby cause resistor to lose efficacy.

The utility model content

The utility model proposes a kind of Power Resistor, it can overcome deficiency of the prior art effectively, covered second electrode at resistive layer, make between resistive layer and electrode and form double contact, increased contact area, reduce contact resistance, thereby greatly reduced the risk that lap-joint is breakdown, burn, strengthened the withstand load ability of resistor.

The technical solution of the utility model is achieved in that a kind of Power Resistor, comprise resistance base body, upper and lower surface at resistance base body is respectively equipped with radiator and resistive layer, sintering electrode once on the two ends of described resistive layer end face, going back sintering on the two ends of described resistive layer bottom surface has second electrode, is equipped with exit at the second electrode two ends.

As preferably, be coated with cover plate on the described resistive layer, stick with glue downlink connection between described cover plate and the resistive layer.

As preferably, described resistance base body is pottery.

The beneficial effects of the utility model are: after adopting said structure, owing to covered second electrode at resistive layer, make between resistive layer and electrode and form double contact, increased contact area, reduced contact resistance, thereby greatly reduce the risk that lap-joint is breakdown, burn, strengthened the withstand load ability of resistor.

Description of drawings

In order to be illustrated more clearly in the utility model embodiment or technical scheme of the prior art, the accompanying drawing of required use was done to introduce simply during the below will describe embodiment, apparently, accompanying drawing in the following describes only is one of them embodiment of the present utility model, for those of ordinary skills, under the prerequisite of not paying creative work, can also obtain according to these accompanying drawings other accompanying drawing.

Fig. 1 is the vertical view of the utility model embodiment;

Fig. 2 is the cutaway view of A-A line among Fig. 1;

Fig. 3 is the structural representation of resistive layer and one-time electrode among the utility model embodiment, second electrode double contact;

Fig. 4 is the structural representation that resistive layer contacts with the one-time electrode single face in the prior art.

Embodiment

Below in conjunction with the accompanying drawing among the utility model embodiment, the technical scheme among the utility model embodiment is clearly and completely described, obviously, described embodiment only is one of them embodiment of the utility model, rather than whole embodiment.Based on the embodiment in the utility model, those of ordinary skills are not making the every other embodiment that obtains under the creative work prerequisite, all belong to the scope of the utility model protection.

To shown in Figure 3, a kind of Power Resistor comprises resistance base body 1 such as Fig. 1, and this resistance base body 1 is pottery.Be respectively equipped with radiator 5 and resistive layer 3 on the upper and lower surface of resistance base body 1, sintering electrode 2 once on the two ends of described resistive layer 3 end faces, go back sintering on the two ends of described resistive layer 3 bottom surfaces second electrode 4 is arranged, be equipped with exit 8 at second electrode 4 two ends, be coated with cover plate 6 on the described resistive layer 3, be connected with glue 7 adhesions between described cover plate 6 and the resistive layer 3.

As shown in Figure 4, the structural representation that contacts with one-time electrode 2 single faces for resistive layer in the prior art 3, the structure of resistive layer and one-time electrode 2, second electrode 4 double contacts in the comparison diagram 3, resistive layer 3 and one-time electrode 2,4 of second electrodes form double contact, increased contact area, reduce contact resistance, thereby greatly reduced the risk that lap-joint is breakdown, burn, strengthened the withstand load ability of resistor.

The above only is preferred embodiment of the present utility model; not in order to limit the utility model; all within spirit of the present utility model and principle, any modification of doing, be equal to replacement, improvement etc., all should be included within the protection range of the present utility model.

Claims

1. Power Resistor, comprise resistance base body, upper and lower surface at resistance base body is respectively equipped with radiator and resistive layer, sintering electrode once on the two ends of described resistive layer end face, it is characterized in that: going back sintering on the two ends of described resistive layer bottom surface has second electrode, is equipped with exit at the second electrode two ends.

2. Power Resistor according to claim 1 is characterized in that: be coated with cover plate on the described resistive layer, stick with glue downlink connection between described cover plate and the resistive layer.

3. Power Resistor according to claim 1 is characterized in that: described resistance base body is pottery.