Manufacturing process of resistor plate, obtained resistor plate and application thereof

Abstract

The invention relates to a method for producing a resistance board, the resistance board and application of the same. In the method, a substrate is taken as a base and attached with a surface electrode film and a resistance film; A. an electrode wire screen is placed on a polyimide film substrate, a layer of electrode sizing agent is printed in the recession of the wire screen by a screen printing method, thereby forming the surface electrode film; B. the resistance film is formed through printing resinous electrode slurry by the screen printing method on the surface electrode film which is the product in step A; and the product with the two films is put into a tunnel kiln for curing, and is divided into a plurality of units along the electrode contraposition line. The resistance board comprises the substrate, the surface electrode film and the resistance film from the inside to the outside, wherein, the substrate is the polyimide film substrate; the surface electrode film is in an open but semienclosed state and the electrode film is cut off with each other; and the resistance film is lapped on the surface electrode film. The resistance board has long service life due to wear resistance and high linearity when used in a throttle position sensor.

Description

technical field [0001] The invention relates to a method for manufacturing a resistance plate, the obtained resistance plate and its application, in particular to a method for manufacturing a resistance plate applied to a throttle position sensor and the obtained resistance plate. Background technique [0002] In order to meet the environmental protection requirements of automobiles and motorcycles, the current automobile fuel system at home and abroad has changed from the original carburetor era to the electronic fuel injection era (that is, electronic fuel injection system). The transition from fuel tanks to electronic fuel injection systems. As an important sensor of the EFI system, the throttle position sensor is used to detect the opening angle of the throttle valve body of the vehicle engine in idling or working state in real time, and transmit the opening angle data to the electronic control unit (ECU). According to the data, the ECU calculates and adjusts the fuel i...

AI Technical Summary

Problems solved by technology

[0004] 1. The surface roughness, warpage and thickness accuracy of the copper-clad PCB board are poor, so that after the carbon film resistor is printed on the PCB board, the plane roughness of the resistive film is poor, causing the brush to slide on the resistive film layer At this time, the friction coefficient between the brush and the resistive film layer is large, and the resistive film layer is easily scratched off by the brush, which greatly affects the life of the product

[0005]2. The contact between the resistance film layer and the brush film is poor, resulting in poor output linearity of the product, which cannot respond well to the linear change of the throttle valve body and engine conditions

The connecting ends of the two materials with different thermal expansion coefficients are prone to peeling between the copper clad layer and the carbon film resistance film layer due to temperature changes during long-term work, which affects the life of the product.

[0007] Chinese patent CN1842253 discloses a production process for surface-mounted multilayer resistor boards, characterized in that: said surface-mounted multilayer resistors The production process of the board includes the following steps: a. Making graphics and drilling files; b. Drilling peripheral holes on the core board, and then making inner layer graphics and inner layer etching; c. Laminating after browning , Pressed into a board; d. After the projection drilling positioning hole, carry out the second drilling and milling the burr; e. After the copper is deposited, the whole board is electroplated, and the outer layer graphics are completed after the graphics are electroplated; f. The board is made Alkaline etching and retaining the tin layer, after cleaning, solder resist and print characters; this kind of resistance board resistance has poor wear resistance

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