Foil-type precision resistor and manufacturing method thereof

A technology of precision resistors and manufacturing methods, applied in the direction of coating resistor materials, etc., can solve problems such as large temperature coefficient of resistance and poor load stability

Inactive Publication Date: 2014-04-09
ZHONGHANG ELECTRONICS MEASURING INSTR
View PDF4 Cites 9 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] In order to overcome the shortcomings of ordinary resistors such as large temperature coefficient of resistance and poor load stability, the pr

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Foil-type precision resistor and manufacturing method thereof
  • Foil-type precision resistor and manufacturing method thereof
  • Foil-type precision resistor and manufacturing method thereof

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0029] Taking into account the influence of the temperature coefficient of resistance of foil resistors and load stability and other parameters, it mainly comes from the resistance chip, including the material selection of substrate, adhesive and metal resistance grid, and subsequent electrical properties, thermal stability and different materials of specific materials. The linear expansion coefficients interact and match each other to achieve better performance parameters. The present invention designs a precision resistor whose structure is similar to a general foil-type precision resistor structure, including a resistor chip, a buffer layer 7 and a package shell 8. : The resistance chip is mainly composed of a substrate 1, an adhesive layer 2, and a resistance pattern; the substrate 1 is bonded to the resistance pattern through the adhesive layer 2, and the front surface of the resistance pattern is attached with a moisture-proof film 4, which is respectively welded on the res...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

PropertyMeasurementUnit
Thicknessaaaaaaaaaa
Thicknessaaaaaaaaaa
Temperature coefficient of resistanceaaaaaaaaaa
Login to view more

Abstract

The invention discloses a foil-type precision resistor and a manufacturing method thereof. A resistance chip comprises a substrate, an adhesive layer and a resistance pattern; the resistance pattern is adhered to the substrate through the adhesive layer; the resistance pattern is made of a metal alloy foil material which is annealed by a vacuum annealing furnace or an atmosphere furnace at 400-600 DEG C for 3-6 hours; the adhesive layer is epoxy resin or phenolic aldehyde-epoxy resin filled with filler; the adhesive layer is formed on the substrate; the metal alloy foil and the substrate are firmly adhered together through the adhesive layer; then the metal alloy foil is adjusted to a nominal resistance value through chemical etching or laser etching by a mechanical or laser cutting method, so that a resistance grid is formed; a layer of a dampproof film is attached to the front surface of the resistance grid; a pin is welded to each of two welding points of the resistance grid and is led out of the substrate, so that the precision resistance chip is formed; a buffering layer wraps the precision resistance chip; the external part of the buffering layer is directly packaged to form a packaging shell.

Description

technical field [0001] The invention relates to a resistor and a manufacturing method thereof, in particular to a foil-type precision resistor and a manufacturing method thereof. Background technique [0002] As we all know, a resistor, as a passive device, is an indispensable basic component in circuit design. One of the main factors affecting circuit performance is the quality of the resistor. The quality of ordinary resistors, especially the resistance value of resistors, changes with the ambient temperature and humidity, and also changes with the self-heating of the current flowing through the resistor. These factors bring stability and reliability to the circuit. come to have a big impact. In order to eliminate or reduce these effects, circuit design puts forward higher requirements on the quality of resistors. [0003] At present, the types of precision resistors include wirewound resistors, metal film resistors and thick film resistors. [0004] Wire-wound resisto...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): H01C17/07
Inventor 晏志鹏张勋刘鹏熊英赵家辉任博哲雒平华李永江田刊杨秀森
Owner ZHONGHANG ELECTRONICS MEASURING INSTR
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap