4-layer printed circuit board has more layers than double side PCB, which has many circuit layer between Top side and Bottom side of PCB and also each layer can connect with via PTH. Therefore, this type is more complex than double side PCB.
4-layer printed circuit boards usually consist of at least one or more cores and prepregs. Cores are made up of a copper-plated glass-reinforced epoxy laminate sheets. The thickness of core is in the range from 0.1mm to 0.3mm.
Our range of 4-layer printed circuit board does not contains soldermasks or silkscreen layers that are primarily cosmetic. To give a charcoal gray appearance, these broads are provided with an opaque inner layers. Moreover, the through-hole pads of these boards can also be connected to, or isolated from, the planes.
The 4 Layer PCB – Production Service is designed for multi-layer circuits. These PCBs include the green solder mask layers and a white silkscreen layer
This boards have many advantages over double-sided boards. They can be designed more compactly, they greatly improve noise immunity and are much easier to lay out.
Position Indicators, Controllers, Memory and Non-Memory Products, Networking, Wireless Communications,LED, LCD, Voice Announcement System, LCD Monitors, Radio and TV, Digital Cameras, etc.