2 For example, SMT patch processing equipment, processes, technology, and PCB circuit board design are commonly known.
3 Among them, the selection of the PCB substrate is also very important.
4 Choosing the appropriate substrate material can not only effectively improve product performance but also ensure product quality.
5 So what are the baseboard materials of the multilayer PCB circuit boards?
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PCB Circuit Board
1. Classification
PCB circuit board substrate materials are divided into two main categories:
1. Organic material substrates, including phenolic resin, glass fiber/epoxy resin (FR4), Polyimide, BT/Epoxy, etc.
2. Inorganic material substrates, including inorganic metal substrates (copper substrates, aluminum substrates, etc.) and ceramic substrates.
2. Advantage Analysis
1. Metal base plates: Metal base plates are composed of 0.3mm to 2.0mm thick metal sheets such as aluminum, iron, copper, epoxy resin semi-cured sheets, and copper foil, which are hot-composite pressed. Metal base plates offer the following performance features:
(1) Good mechanical performance: Metal substrates exhibit strong mechanical strength and toughness, addressing the brittleness often found in printed circuit boards based on inorganic materials. They are suitable for large-area patch processing and can support heavy component installations. Additionally, dimensional stability and surface smoothness are major advantages of metal base materials.
(2) Effective heat dissipation: Due to direct contact between the metal base plate and the semi-cured sheet, excellent heat dissipation performance is achieved. This setup efficiently disperses heat generated during patch processing. The circuit board’s heat dissipation capacity depends on the thickness of the metal substrate and the resin layer. Electrical performance considerations, such as electrical resistance, must also be taken into account during design.
(3) Electromagnetic shielding capability: In high-frequency circuits, preventing electromagnetic wave radiation is crucial. Metal substrates naturally form a protective layer that shields electromagnetic waves.
3. PCB Ceramic Substrate
Ceramic substrates are widely used in power electronic circuits due to the following advantages:
(1) Excellent electrical insulation performance, which is fundamental for substrates.
(2) High thermal conductivity, facilitating efficient heat transfer from the circuit.
(3) Superior brazing performance, high adhesive strength, and high current carrying capacity.
PCB circuit boards utilize various types of substrate materials, each offering distinct advantages. Selecting the appropriate substrate material based on actual usage and processing conditions ensures high-quality final product formation. WellCircuits is committed to continuously improving processes to provide customers with superior PCB board processing services.
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These revisions aim to improve readability and clarity while maintaining the technical details of the original text.