FR-4 VS aluminum plate

FR-4 has a CTE value of approximately 15 to 19 ppm/¡ãC, which is suitable for the majority of organic encapsulation needs. As industry demand for low CTE packages has increased, the CTE of FR-4 has come under higher scrutiny.

Double-sided PCB board prototype

A double-sided PCB board prototype is a substrate covered by two layers of copper foil circuits, separated by insulating materials in the middle.