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High-performance carbon film resistor, and preparation method thereof

A carbon film resistor, high-performance technology, used in resistors, adjustable resistors, circuits, etc., can solve the problems of large influence of voltage and frequency, poor stability of carbon film slurry, etc., and achieve small influence of voltage and frequency. , The effect of low production cost and small noise electromotive force

Inactive Publication Date: 2016-02-24
陈桂兴
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] However, the carbon film slurry provided by the above patents has poor stability and is greatly affected by voltage and frequency.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] A high-performance carbon film resistor, the parts by weight of each component of the carbon film slurry raw material are:

[0027] 15 parts of graphite, 8 parts of carbon black, 1 part of phenolic resin, 2 parts of silica, 1 part of binder, 2 parts of silver oxide, 3 parts of copper oxide, and 30 parts of propanol.

[0028] Its preparation method comprises the following steps:

[0029] Mix graphite and carbon black, ball mill for 30 minutes, sinter at 170°C for 20 minutes under nitrogen protection, add other slurry raw materials, ultrasonically treat for 30 minutes, pass through a 130 μm filter membrane to obtain carbon film slurry; magnetron sputtering the carbon film slurry in On the ceramic substrate, control the accelerating voltage to be 300V, the magnetic field to be 200G, the current density to be 50mA / cm, the power density to be 30W / cm, and the film thickness to be 0.2μm to obtain the finished product.

Embodiment 2

[0031] A high-performance carbon film resistor, the parts by weight of each component of the carbon film slurry raw material are:

[0032] 25 parts of graphite, 16 parts of carbon black, 3 parts of phenolic resin, 5 parts of silica, 3 parts of binder, 3 parts of silver oxide, 5 parts of copper oxide, and 40 parts of propanol.

[0033] Its preparation method comprises the following steps:

[0034] Mix graphite and carbon black, ball mill for 40 minutes, sinter at 180°C for 28 minutes under nitrogen protection, add other slurry raw materials, ultrasonically treat for 45 minutes, pass through a 160 μm filter membrane to obtain carbon film slurry; magnetron sputtering the carbon film slurry in On the ceramic substrate, control the accelerating voltage to be 340V, the magnetic field to be 300G, the current density to be 60mA / cm, the power density to be 40W / cm, and the film thickness to be 0.8μm to obtain the finished product.

Embodiment 3

[0036] A high-performance carbon film resistor, the parts by weight of each component of the carbon film slurry raw material are:

[0037] 20 parts of graphite, 12 parts of carbon black, 2 parts of phenolic resin, 3 parts of silica, 2 parts of binder, 2.5 parts of silver oxide, 4 parts of copper oxide, and 35 parts of propanol.

[0038] Its preparation method comprises the following steps:

[0039] The graphite and carbon black were mixed, ball milled for 35 minutes, sintered at 175°C for 24 minutes under nitrogen protection, then added with other slurry raw materials, ultrasonically treated for 40 minutes, and passed through a 145 μm filter film to obtain carbon film slurry; the carbon film slurry was magnetron sputtering in On the ceramic substrate, control the accelerating voltage to be 320V, the magnetic field to be 250G, the current density to be 55mA / cm, the power density to be 35W / cm, and the film thickness to be 0.5μm to obtain the finished product.

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Abstract

The invention relates to a high-performance carbon film resistor, and a preparation method thereof, and belongs to the technical field of thin film resistor. A carbon film slurry comprises, by weight, 15 to 25 parts of graphite, 8 to 16 parts of carbon black, 1 to 3 parts of phenolic resin, 2 to 5 parts of silicon dioxide, 1 to 3 parts of a binder, 2 to 3 parts of silver oxide, 3 to 5 parts of copper oxide, and 30 to 40 parts of propyl alcohol. The preparation method comprises following steps: graphite and carbon black are mixed, an obtained mixture is subjected to ball milling for 30 to 40min, and is subjected to sintering for 20 to 28min under nitrogen protection at 170 to 180 DEG C; the other raw materials are added, an obtained mixed product is subjected to ultrasonic treatment for 30 to 45min, and is delivered through a filter membrane with filtration pore diameter of 130 to 160<mu>m so as to obtain the carbon film slurry; a ceramic substrate is coated with the carbon film slurry via magnetron sputtering so as to obtain finished products, wherein acceleration voltage is controlled to be 300 to 340V, magnetic field intensity is controlled to be 200 to 300G, electric current density is controlled to be 50 to 60mA / cm, power density is controlled to be 30 to 40W / cm, film thickness is controlled to be 0.2 to 0.8<mu>m. The high-performance carbon film resistor possesses excellent performance, low negative temperature coefficient, and excellent high frequency characteristics; influences caused by voltage and frequency are low; noise electrodynamic potential is low; pulse load is stable; resistance range is wide; and production cost is low.

Description

technical field [0001] The invention relates to a high-performance carbon film resistor and a preparation method thereof, belonging to the technical field of thin film resistors. Background technique [0002] Resistors are generally directly referred to as resistances in daily life. It is a current-limiting element. After the resistor is connected to the circuit, the resistance value of the resistor is fixed. Generally, there are two pins, which can limit the current through the branch it is connected to. A resistor whose resistance value cannot be changed is called a fixed resistor. Those with variable resistance are called potentiometers or variable resistors. An ideal resistor is linear, that is, the instantaneous current through the resistor is proportional to the instantaneous applied voltage. Variable resistors for voltage division. On the exposed resistor body, one or two movable metal contacts are pressed tightly. The position of the contacts determines the resi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01C10/00
CPCH01C10/00
Inventor 陈桂兴
Owner 陈桂兴
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