Patent Application
20230343491
The present invention relates to an ignition resistor, in particular to an ignition resistor with high humidity-resistance and anti-static characteristic.
Generally, the surface resistance igniter is a narrow channel with low resistance. When a high voltage is applied, the narrow channel fuses and sparks to turn the electric energy into thermal energy in a short time, i.e. fused ignition.
Generally, the resistance value of the narrow channels of the surface resistance ignitor requires to be accurate. However, as the narrow channels are easy to contact with external vapor or sulfur gas and generate unwilling chemical reactions, the narrow channels are vulnerable to static electricity in the environment, causing ineffectiveness of the ignition of the ignition resistor.
In order to solve the above-mentioned problems, a layer of highly moisture-resistant protective gels is used to cover the ignition circuit, and conductive layers are disposed on both sides of the ignition circuit. That leads to eliminate static electricity and to improve the anti-moisture and antistatic capabilities of an ignition resistor.
The present invention provides an ignition resistor, comprising:
The present invention provides a manufacturing method of an ignition resistor, comprising:
Various embodiments of the present invention will be described in detail as below, and the drawings will be used as examples to help readers to have a better understanding. In addition to these detailed descriptions, the present invention can also be widely implemented in other embodiments. Any substitutions, modifications, and equivalent changes of the embodiments should be understood to be included in the scope of the present invention. The scope of patents should be based on the scope of the claims. It should be noted that the drawings are for illustrative purposes only, and do not represent the actual size or quantity of the components. Some details may not be completely drawn in order to keep the drawings concise.
In some embodiments, the ignition resistor further comprises two rear electrodes 6 disposed on the rear surface of the substrate 1. Both rear electrodes 6 correspond to both electrode portions 21 and electrically connect to both electrode portions 21 by conductive layers 7 disposed on the two sides of the substrate 1. In this embodiment, the ignition resistor can connect with the external circuit board via the rear electrodes 6. When conducting, the current can enter from one of the rear electrodes 6, pass through one of the conductive layers 7, one of the electrode portions 21, the ignition portion 22, the other electrode portion 21, the other side conductive layer, and flows out from the other rear electrode. The ignition portion 22 generates heat and sparks.
In a preferred embodiment, the ignition portion 22 is thinner and narrower than electrode portion 21. The ignition structure 2 has an I-shape from top view, the narrow channel is the ignition portion 22, and both wide ends are the two electrode portions 21. The width of ignition portion 22 is in the range of 40-100 μm.
In an embodiment, the thickness of the protective layer 4 and the thickness of the ignition portion 22 are 8 to 15 μm. In one embodiment, the protective layer 4 and the thickness of the ignition portion 22 have the same thickness. The protective layer 4 isolates the ignition portion 22 from external moisture or sulfur gas. When a voltage is applied, the temperature of the ignition portion 22 can reach 280° C. above, i.e. the ignition portion 22 is transformed to be a hot spot. It means the heat resistibility of the protective layer is also above 280° C.
In a preferred embodiment, the material of the ignition structure 2 is nickel-chromium alloy, copper-nickel alloy or copper. The material of the substrate 1 is polyimide, polycarbonate, glass fiber or ceramic material. The material of the antistatic layer 3 is copper. The material of protective layer 4 is epoxy resin.
The manufacturing method of ignition resistor of the present invention comprises:
Step 1: sticking an ignition structure on a substrate through an adhesive layer, wherein the ignition structure comprises an ignition portion and two electrode portions connected to both ends of the ignition portion;
Step 2: forming two anti-static layers on the substrate both sides of the ignition portion between the two electrode portions; and
Step 3: covering the ignition portion by a protective layer.
In some embodiments, the adhesive layer can be coated on the two antistatic layers.
In some embodiments, the manufacturing method of ignition resistor further comprises forming a rear electrode on rear surface of the substrate corresponding to both electrodes, and forming two side conductive layers for connecting the two electrode portions with the two rear portions.
The ignition resistor of the present invention improves the moisture resistance and antistatic ability by covering the ignition circuit with a layer of moisture-resistant protective gels and disposing antistatic layers on both sides of the ignition circuit.
| Number | Date | Country | Kind |
|---|---|---|---|
| 111115651 | Apr 2022 | TW | national |
