What is a thin film precision chip resistor?

Thin film precision chip resistors are a special type of electronic component. The following is a detailed introduction to thin film precision chip resistors:

1、 Definition
Thin film precision chip resistor is a type of resistor made by evaporating a certain resistivity material onto the surface of an insulating material (such as a ceramic substrate) using a similar evaporation method. It belongs to a type of metal glass glaze resistor, which is formed by mixing metal powder and glass glaze powder and printing them on a substrate using a specific process (such as screen printing). This type of resistor has the characteristics of small size, light weight, moisture resistance, high temperature resistance, and low temperature coefficient.

2、 Working principle
The basic principle of thin film precision chip resistors is to use conductive materials to form a thin film on the substrate, and to achieve the desired resistance value and accuracy by controlling the geometric shape and electrical parameters of the film, such as resistivity, length, width, and thickness. Among them, resistivity is one of the most important parameters. Thin film resistors can be used as signal conditioning devices in circuits to control the signal size and waveform by adjusting the resistance value, thereby achieving functions such as voltage stabilization, filtering, and current limiting.

3、 Production process
The production process of thin-film surface mount resistors is relatively complex, mainly including the following steps:

Back electrode printing and sintering: Printing back electrodes on ceramic or glass substrates and subjecting them to sintering treatment.
Surface electrode printing and sintering: Print the surface electrode and perform a second sintering.
Resistance printing and curing: Resistance materials are printed on a substrate using precision printing technology to form a resistance body, which is then sintered and cured.
Laser resistance adjustment: Fine tune the resistance value to ensure that it meets the design requirements.
Printing and sintering of glass protective layer: Print the glass protective layer and perform sintering treatment.
Cutting and electroplating electrodes: Cut resistors and electroplate electrodes.
Testing and Sorting: Testing and sorting the produced resistors to ensure product quality.
4、 Application Fields
Thin film precision surface mount resistors are widely used in various fields such as instruments, medical devices, power supplies, power equipment, electronic digital products, etc. Specifically, it can be used in the motherboard circuits of consumer electronic devices such as smartphones, tablets, televisions, and speakers to perform functions such as signal conditioning, voltage division, and current limitation; It can also be used in communication equipment such as base stations, routers, switches, etc., for various circuit designs such as filtering, matching, and bias; It can also be used for control circuits in fields such as automotive electronics and industrial automation.

5、 Characteristics and advantages
Small size and light weight: Thin film precision chip resistors have a small size and light weight, which is conducive to saving circuit space costs and making the design more refined.
Stable electrical performance: With stable electrical performance and high reliability, it is suitable for various harsh environments.
Low assembly cost: high compatibility with automatic mounting equipment, which can reduce assembly costs.
High mechanical strength: It has high mechanical strength and can withstand certain mechanical stresses.
Superior high-frequency characteristics: exhibiting superior performance in high-frequency circuits.
In summary, thin film precision chip resistors are electronic components with characteristics such as small size, light weight, stable electrical performance, low assembly cost, high mechanical strength, and superior high-frequency characteristics. It has broad application prospects and development potential in the modern electronics industry.c