Editorial Team - PCB Directory
Jun 14, 2020
High-temperature processing comes into play during the manufacturing of the high-frequency PCB boards. It starts with the lamination of prepreg on the dielectric substrate followed by adding the circuit layer. Heat-processing is the primary source to combine all these layers together to form a well-defined board. Thermoplastic and Thermoset materials are generally used for the dielectric layers in PCBs or as adhesives in manufacturing circuit laminates. These materials have their own strengths and weaknesses.
A Thermoplastic material is also called thermo-softening plastic. It is a polymer, which converts to liquid when heated and attains a glassy hard state when cooled.
Characteristics of Thermoplastic Material
Issues associated with Thermoplastic Material: Their processing is difficult due to their high CTE value.
Thermoset is also called thermosetting plastic. It is also a polymer material that is cured by applying heat (above 200 centigrade) through a chemical reaction. Before curing, this material is in liquid or malleable form.
Characteristics of Thermoset Material
Issues associated with Thermoset Material
The characteristics of both thermoplastic and thermoset materials can be improved with the choice of accurate filler material. This choice of filler material greatly impacts their electrical performance levels.
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