Questions & Answers on PCB Substrates

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PCB Substrates

Editorial Team - PCB Directory

Sep 14, 2019

Aluminum-based Printed Circuit Boards use an Aluminum alloy as a base material for the PCB i.e. the dielectric layer is sandwiched between the Aluminum alloy and circuit layer. The Aluminum alloy is a composite of magnesium and silumin (Al-Mg-Si).Aluminum based PCBs are part of the Metal Core PCB family and deliver excellent thermal conductivity and insulation.Key Advantages of Aluminum Based PCBs...read more

What are Ceramic PCB Boards?

PCB Substrates

Editorial Team - PCB Directory

Sep 14, 2019

Ceramic PCB boards are made from ceramic material like Aluminum Nitride, Aluminum Oxide, Boron Nitride, Beryllium Oxide, and Silicon Carbide. The word ‘Ceramic’ refers to a class of materials having similar chemical structure and physical properties. Ceramic PCBs have been playing a vital role in the development of miniaturized electronic products.Advantages of Ceramic Printed Circuit ...read more

What are CEM-1 PCB Boards?

PCB Substrates

Editorial Team - PCB Directory

Sep 14, 2019

PCB boards that use two layers of woven glass fabric and paper (cellulose) along with epoxy as the substrate material are called CEM-1 PCB boards. This material is milky white or milky yellow in colour with a smooth finish and used for single layer PCB fabrication only since it’s not compatible with plated through hole (PTH) technology.CEM-1 provides excellent electrical and mechanical prope...read more

What are Copper Based PCBs?

PCB Substrates

Editorial Team - PCB Directory

Sep 14, 2019

Copper-based PCBs use copper as a primary base material in place of commonly used FR4. The copper base material is then covered with an insulating layer followed by a circuit layer. Copper core/based PCBs are known to have excellent heat dissipation and can be used for high frequency applications with minimal variation in performance over wide temperature ranges. However, these advantages do come ...read more

Polyethylene for PCB Boards

PCB Substrates

Editorial Team - PCB Directory

Sep 14, 2019

Polyethylene or polythene is a thermoplastic which is a mixture of similar polymers of ethylene. A PCB board which uses polythene as a substrate material is called Polyethylene PCB board.Polyethylene is highly ductile and has a very high density. It offers low friction and does not absorb moisture. The material acts as an excellent insulator. Apart from its peculiar characteristics, it has some de...read more

CEM-3 PCB Boards

PCB Substrates

Editorial Team - PCB Directory

Sep 15, 2019

Composite epoxy materials (CEMs) are made by combining two or more materials having different chemical and physical properties to achieve the desired substrate material with unique properties and characteristics. CEMs are generally used in PCBs as a substrate material.The PCB boards which use woven glass fabric and paper (cellulose) along with epoxy as the substrate material are called CEM-3 PCB b...read more

Polyester PCB Boards

PCB Substrates

Editorial Team - PCB Directory

Sep 15, 2019

Polyesters, also called Polyethylene Terephthalate (PET), are the most commonly used material to manufacture flexible PCBs. They are best-known for their flexibility, good electrical properties, and high chemical and moisture resistance.Key Characteristics:They have a melting point of 250ºC and a glass transition temperature of 80ºC.They have lower heat resistance that inhibits their use...read more

What are Composite Epoxy Materials (CEMs)?

PCB Substrates

Editorial Team - PCB Directory

Jul 12, 2019

Composite epoxy materials (CEMs) are made by combining two or more materials having different chemical and physical properties to achieve the desired substrate material with unique properties and characteristics. Epoxy synthetic resin is used to combine materials. It acts as a binding agent to hold the materials together. It also transfers the thermal stress between the materials and protects them...read more

Polyflon PCB Boards

PCB Substrates

Editorial Team - PCB Directory

Sep 14, 2019

Polyflon is a thermally-stabilized, polyolefin thermoplastic bonding film, which is used as a substrate material for the manufacturing of multilayer PCB boards. The polyflon molecules are inert and as a result of this it is challenging to combine them with copper foil. The material requires a unique surface finish to be compatible with the copper foil at the time of PCB manufacturing. This unique ...read more

What are FR-5 PCB Boards?

PCB Substrates

Editorial Team - PCB Directory

Sep 15, 2019

The FR-5 substrate is made up of woven glass reinforced material and an epoxy resin binder. It is a thermosetting fiberglass composite available in yellow-green-tan blended colour. The substrate has a glass transition temperature (Tg) of 160° C (320° F), and the maximum operating temperature is 140° C (284° F).FR-5 is a great option for multi-layer PCB designs. It has excellent mec...read more

What are Sink-Pad Copper Substrates?

PCB Substrates

Editorial Team - PCB Directory

Mar 13, 2022

The presence of metal helps in managing the heat dissipated by high power LEDs when operating, thereby keeping them cool and working longer.The next generation LED solution is the sink-pad copper substrate PCBs for a wide array of products in LED modules. The sink-pad technology offers a printed circuit board with a high efficiency thermal management capability. This technology allows conducting h...read more

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