The standard thickness of the PCB is 1.57 mm. Some manufacturers will accommodate other specific thicknesses of 0.78mm or 2.36mm. When we say "thick" or "thin" FR4, we are usually comparing to the standard thickness of 1.57mm.
The impedance of a circuit board trace depends on: trace width and thickness. The height of the dielectric layer between the signal trace and the reference plane. The dielectric constant of the dielectric material used in the circuit board.
Impedance is the combination of capacitance and inductance when a circuit operates at high frequencies.
Two types: electroless nickel immersion gold and electroplated hard gold.
Higher stability, best to withstand high power density designs, ideal for multilayer and HDI PCBs.
The circuit board material must be flame retardant, cannot burn at a certain temperature, but can only soften. This temperature point is called the glass transition temperature (Tg). A higher Tg point means higher temperature requirements during laminatio
Tg, or glass transition temperature, is a basic material parameter of temperature (°C). It defines the temperature at which the substrate becomes mechanically unstable. Tg is the temperature value that guarantees the mechanical stability of the PCB during
Lightweight and understatedDimensional stabilityheat dissipationLow cost backlit membrane switchDust and moisture proofEasy integration into complex interface componentsHigh efficiency and low power consumptionAvailable in a variety of sizes, colors and s
Flexible LED PCB, Rigid LED PCB, Hybrid LED PCB, Multilayer LED PCB, Single Layer LED PCB.
The LEDs are attached to the PCB through a soldering process and emit light when electrically connected.
Heavy copper PCBs use 4 or more ounces of copper per layer.
The thickness of the metal core in a PCB substrate is typically 30 mil - 125 mil, but thicker and thinner boards are possible.