阅读说明：本技术 一种氮氧化物传感器芯片 (Nitrogen oxide sensor chip ) 是由 张文振 徐斌 苗伟峰 应俊 陈瑶 孔德方 吴启凡 于 2019-11-01 设计创作，主要内容包括：本发明公开了一种氮氧化物传感器芯片,其特征在于包括基板、测试电极、辅助电极、引线和引脚电极,测试电极、辅助电极、引线和引脚电极都安装在基板顶面,测试电极、辅助电极安装在基板顶面左部,引脚电极安装在基板顶面右部,测试电极、辅助电极分别通过引线与引脚电极连接。本发明整体结构简单,工艺流程少制作方便,成品合格率高,同时能够降低生产成本。(The invention discloses a nitric oxide sensor chip which is characterized by comprising a substrate, a test electrode, an auxiliary electrode, a lead and a pin electrode, wherein the test electrode, the auxiliary electrode, the lead and the pin electrode are all arranged on the top surface of the substrate, the test electrode and the auxiliary electrode are arranged on the left part of the top surface of the substrate, the pin electrode is arranged on the right part of the top surface of the substrate, and the test electrode and the auxiliary electrode are respectively connected with the pin electrode through leads. The invention has simple integral structure, less process flow, convenient manufacture and high finished product qualification rate, and can reduce the production cost.)

1. The utility model provides a nitrogen oxide sensor chip, its characterized in that includes base plate, test electrode, auxiliary electrode, lead wire and pin electrode, and test electrode, auxiliary electrode, lead wire and pin electrode are all installed at the base plate top surface, the base plate is whole to be the rectangle thin slice, test electrode installs in base plate top surface left part rear side, auxiliary electrode installs in base plate top surface left part front side, the pin electrode has two, and both sides around base plate top surface right part are installed to two pin electrodes, the lead wire has two, and a pin connection test electrode and a pin electrode, another pin connection auxiliary electrode and another pin electrode, two leads wire are parallel to each other.

2. The NOx sensor chip of claim 1, wherein said test electrode and said auxiliary electrode are printed on the top surface of said substrate, and the horizontal longitudinal center lines of said test electrode and said auxiliary electrode coincide with each other.

3. The NOx sensor chip of claim 1 wherein said two pin electrodes have horizontal longitudinal centerlines that coincide with each other.

4. The NOx sensor chip of claim 1, 2 or 3, wherein the horizontal transverse center line of the test electrode is coincident with the horizontal transverse center line of the rear side pin electrode on the right portion of the substrate, and the horizontal transverse center line of the auxiliary electrode is coincident with the horizontal transverse center line of the front side pin electrode on the right portion of the substrate.

5. The NOx sensor chip of claim 1, wherein said test electrode is formed of La_xA_{1- x}Fe_yB_1-yO₃Is made of material, A is Sr or Ca, 0<x is less than or equal to 1, B is V, Co, Mn, Ni, Cr, Cu or Zn, 0<y is less than or equal to 1, the auxiliary electrode is made of a Pt and Au composite material, the Au content is 1-50%, the lead and the pin electrode are made of a Pt material, and the substrate is made of a zirconia material stabilized by yttrium oxide.

Technical Field

The invention relates to the field of sensor chips, and particularly belongs to a nitric oxide sensor chip.

Background

The sensor is used for detecting the oxygen content concentration and the oxygen content dilution in the waste gas by detecting the oxygen ion components in the waste gas by a chip based on an electrochemical principle, thereby achieving the purposes of energy conservation, consumption reduction and environmental protection. The electronic fuel injection automobile utilizes the three-way catalyst to reduce the components of carbon monoxide, hydrocarbon and oxynitride in the exhaust gas so as to obtain high exhaust gas purification rate, but in order to effectively use the three-way catalyst, the air-fuel ratio must be accurately controlled so that the actual air-fuel ratio is always close to the theoretical air-fuel ratio. The sensor is used for detecting the rich and lean degrees of oxygen content in the exhaust gas, and transmitting the detected value to the automobile processor to control the air-fuel ratio, so that the actual air-fuel ratio is ensured to be close to the theoretical air-fuel ratio all the time, and the components of carbon monoxide, hydrocarbon and oxynitride in the automobile exhaust are reduced.

The patent with the application number of CN201810622527.6 discloses a nitrogen oxide sensor ceramic chip, which is formed by arranging an oxygen pump anode with a surface covering protective layer on a first membrane, arranging acquisition cavities on the oxygen pump anode and the first membrane, arranging a second through hole, a third through hole and a fourth through hole on a second membrane, arranging a first diffusion barrier in the second through hole, dividing the second through hole into a first measuring chamber and a buffer cavity by the first diffusion barrier, arranging a main oxygen pump cathode in the first measuring chamber, arranging a second diffusion barrier between the second through hole and the third through hole, arranging an auxiliary pump cathode in the second measuring chamber by the third through hole, arranging a third diffusion barrier between the third through hole and the fourth through hole, arranging a measuring electrode with a surface covering protective layer in the third measuring chamber by the fourth through hole, arranging a reference electrode with a surface covering protective layer in the third through hole, arranging a heating electrode wrapped in a heating electrode insulating layer between the fourth membrane and a fifth membrane, the heating electrode outer lead penetrates through the fifth layer membrane and is positioned on the lower surface of the fifth layer membrane, and the fifth layer membrane is provided with a stress release hole filled with heating electrode insulating layer slurry. The nitrogen oxide sensor chip has the advantages of complex integral structure, more production process flows, low production yield and high production cost. Therefore, the invention provides an oxynitride sensor chip.

Disclosure of Invention

The invention provides a nitric oxide sensor chip, which solves the problems mentioned in the background technology through the overall optimization research and development design of a substrate, a test electrode, an auxiliary electrode, a lead and a pin electrode. Meanwhile, the invention has simple integral structure, less process flow, convenient manufacture and high finished product qualification rate, and can reduce the production cost.

The technical scheme adopted by the invention is as follows:

the utility model provides a nitrogen oxide sensor chip, its characterized in that includes base plate, test electrode, auxiliary electrode, lead wire and pin electrode, and test electrode, auxiliary electrode, lead wire and pin electrode are all installed at the base plate top surface, the base plate is whole to be the rectangle thin slice, test electrode installs in base plate top surface left part rear side, auxiliary electrode installs in base plate top surface left part front side, the pin electrode has two, and both sides around base plate top surface right part are installed to two pin electrodes, the lead wire has two, and a pin connection test electrode and a pin electrode, another pin connection auxiliary electrode and another pin electrode, two leads wire are parallel to each other.

Preferably, the test electrode and the auxiliary electrode are printed on the top surface of the substrate, and the horizontal and longitudinal center lines of the test electrode and the auxiliary electrode are mutually coincident.

Preferably, the horizontal longitudinal center lines of the two pin electrodes coincide with each other.

Preferably, the horizontal transverse center line of the test electrode is overlapped with the horizontal transverse center line of the right rear pin electrode of the substrate, and the horizontal transverse center line of the auxiliary electrode is overlapped with the horizontal transverse center line of the right front pin electrode of the substrate.

Preferably, the test electrode is made of La_xA_1-xFe_yB_1-yO₃Is made of material, A is Sr or Ca, 0<x is less than or equal to 1, B is V, Co, Mn, Ni, Cr, Cu or Zn, 0<y is less than or equal to 1, the auxiliary electrode is made of a Pt and Au composite material, the Au content is 1-50%, the lead and the pin electrode are made of a Pt material, and the substrate is made of a zirconia material stabilized by yttrium oxide.

Compared with the prior art, the invention has the following beneficial effects:

the nitrogen oxide sensor chip is manufactured through the overall optimization research and development design of the substrate, the test electrode, the auxiliary electrode, the lead and the pin electrode. The testing electrode is arranged on the rear side of the left part of the top surface of the substrate, the auxiliary electrode is arranged on the front side of the left part of the top surface of the substrate, the number of the pin electrodes is two, the two pin electrodes are arranged on the front side and the rear side of the right part of the top surface of the substrate, the lead wires are two, one lead wire is connected with the testing electrode and one pin electrode, the other lead wire is connected with the auxiliary electrode and the other pin electrode, the two lead wires are parallel to each other, and the problems that the integral structure of a nitrogen oxide sensor chip is complex, the production process.

The invention has simple integral structure, less process flow, convenient manufacture and high finished product qualification rate, and can reduce the production cost.

Drawings

FIG. 1 is a schematic view of the overall structure of the present invention;

FIG. 2 is a graphical representation of a plot of NOx concentration versus NOx sensor voltage during use of the present invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

The present invention will be described in further detail with reference to examples and specific embodiments.

Referring to the drawings: a nitric oxide sensor chip is characterized by comprising a substrate (1), a test electrode (2), an auxiliary electrode (3), leads (4) and pin electrodes (5), wherein the test electrode (2), the auxiliary electrode (3), the leads (4) and the pin electrodes (5) are all arranged on the top surface of the substrate (1), the substrate (1) is integrally a rectangular thin sheet, the test electrode (2) is arranged on the rear side of the left part of the top surface of the substrate (1), the auxiliary electrode (3) is arranged on the front side of the left part of the top surface of the substrate (1), the number of the pin electrodes (5) is two, the two pin electrodes (5) are arranged on the front side and the rear side of the right part of the top surface of the substrate (1), the leads (4) are two, one lead (4) is connected with the test electrode (1) and one pin electrode (5), the other lead (4) is connected with the auxiliary electrode (3) and the, the two leads (4) are parallel to each other.

Preferably, the test electrode (2) and the auxiliary electrode (3) are printed on the top surface of the substrate (1), and the horizontal longitudinal center lines of the test electrode (2) and the auxiliary electrode (3) are coincident with each other.

Preferably, the horizontal longitudinal center lines of the two pin electrodes (5) coincide with each other.

Preferably, the horizontal transverse center line of the test electrode (1) is mutually overlapped with the horizontal transverse center line of the rear-side pin electrode (5) at the right part of the substrate (1), and the horizontal transverse center line of the auxiliary electrode (2) is mutually overlapped with the horizontal transverse center line of the front-side pin electrode (5) at the right part of the substrate (1).

Preferably, the test electrode (2) is made of La_xA_1-xFe_yB_1-yO₃Is made of material, A is Sr or Ca, 0<x is less than or equal to 1, B is V, Co, Mn, Ni, Cr, Cu or Zn, 0<y is less than or equal to 1, the auxiliary electrode (3) is made of a Pt and Au composite material, the Au content is 1-50%, the lead (4) and the pin electrode (5) are made of Pt materials, and the substrate (1) is made of a zirconium oxide material stabilized by yttrium oxide.

When in use: the pin electrode (5) is connected with an automobile processor through a transmission lead; automobile exhaust gets into inside the nitrogen oxide sensor, with test electrode (2) on base plate (1), auxiliary electrode (3) contact, test electrode (2), auxiliary electrode (3) form different potential differences with automobile exhaust after the contact, test electrode (2), the potential difference that auxiliary electrode (3) produced, through lead wire (4), pin electrode (5) and transmission wire, convey the vehicle processor, the vehicle processor is through comparing test electrode (2), the different potential differences of auxiliary electrode (3), the adjustment automobile engine oil spout time, make the engine be in best operating condition.

The invention solves the problems of complex integral structure, multiple production process flows, low production qualification rate and high production cost of the nitric oxide sensor chip. Wherein, test electrode (2) are installed in base plate (1) top surface left part rear side, auxiliary electrode (3) are installed in base plate (1) top surface left part front side, pin electrode (5) have two, both sides around base plate (1) top surface right part are installed in two pin electrode (5), lead wire (4) have two, test electrode (2) and a pin electrode (5) are connected in lead wire (4), auxiliary electrode (3) and another pin electrode (5) are connected in another lead wire (4), two lead wires (4) are parallel to each other, the problem that nitrogen oxide sensor chip overall structure is complicated has been solved, the production technology flow is many, the production percent of pass is low, manufacturing cost is high. Meanwhile, the invention has simple integral structure, less process flow, convenient manufacture and high finished product qualification rate, and can reduce the production cost.

The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various changes and modifications can be made without departing from the inventive concept of the present invention, and these changes and modifications are all within the scope of the present invention.