Question

What is substrate material?

Answer 1

Substrate materials are the basic materials for manufacturing semiconductor components and printed circuit boards (PCBs), and have a variety of characteristics and functions. The following is a brief introduction to substrate materials:

Definition and Function

Definition: Substrate materials, also known as substrate materials, are the basic supporting materials for electronic components and PCB boards.
Function: Substrate materials mainly play the role of mechanical protection and support for chips, while realizing electrical connection or electrical insulation between circuit components.

Main types

Traditional materials: Semiconductor materials such as silicon and gallium arsenide are used to manufacture semiconductor components.
PCB substrate materials:
+ Glass fiber: It has the advantages of high strength and good flame retardancy, and is often used in high-end products such as aerospace.
+ Resin: Such as polystyrene, polyamide, etc., with low cost and easy processing, widely used in conventional electronic products.
+ Metal: Such as aluminum substrate and copper substrate, with good thermal conductivity, suitable for high-power LED lamps and electronic radiators.

Performance requirements

Electrical insulation: Substrate materials must have high electrical insulation properties, including insulation resistance, surface resistance, volume resistance, etc., to ensure the stability of electronic products.
Dielectric properties: including dielectric constant and dielectric loss factor, which are closely related to frequency and temperature, and affect the signal transmission and impedance control of the circuit board.
Heat resistance: The substrate material needs to have good heat resistance to meet the working requirements of electronic products in high temperature environments.
Mechanical properties: As electronic products develop towards thinness, lightness and miniaturization, the mechanical properties of substrate materials are increasingly required, such as bending strength and impact toughness.
Environmental protection and standards
Environmental protection requirements: With the increase of environmental awareness, substrate materials need to meet environmental protection standards and reduce the use and emission of harmful substances.
Standards and specifications: The production and use of substrate materials must comply with relevant national and international standards, such as UL-94 flame retardant standards, IEC international standards, etc.
In summary, substrate materials are indispensable basic materials in the electronics industry, and their performance and quality directly affect the performance and reliability of electronic products. With the continuous development of electronic technology, the requirements for substrate materials will continue to increase.

Answer 2

Substrate materials are widely used in many fields, mainly including the following aspects:

1. Circuit board field: Substrate is the main material of printed circuit board (PCB), providing support and connection for circuit components.

2. Chip manufacturing field: Substrate plays an important role in chip manufacturing as the carrier, packaging layer material and cable of the chip.

3. Semiconductor device field: Substrate is widely used in the production of semiconductor devices such as photodiodes and transistors.

4. Optoelectronic field: Substrate is also an indispensable material in optoelectronic devices such as LED and semiconductor laser.

5. High-power electronic devices: Due to the excellent thermal conductivity of metal substrates, they are also widely used in the manufacture of high-power LED lamps and electronic radiators.

6. Special environment applications: In high-end fields such as aerospace and military industry, there are higher requirements for the performance of substrate materials, such as high temperature resistance, corrosion resistance, high strength, etc., so these fields also use a large number of substrate materials.

In summary, substrate materials are widely used in many fields such as electronics, semiconductors, optoelectronics, etc., and are indispensable carrier materials in modern electronic technology.

Answer 3

The chemical properties of substrate materials are mainly reflected in their stability. Substrate materials, such as metal substrates (such as copper, aluminum, etc.), ceramic substrates (such as alumina, aluminum nitride, etc.) and composite substrates, usually have excellent chemical stability.

This means that they are not easily affected by corrosion and oxidation in the external chemical environment, and can maintain stable performance in harsh chemical environments.

This chemical stability makes substrate materials widely used in electronic components and integrated circuits.

For example, metal substrates play an important role in power electronic devices and microelectronic devices with their excellent heat dissipation and machining properties; while ceramic substrates have become the basic materials for high-power power electronic circuit structure technology and interconnection technology with their high thermal conductivity and high insulation.