A heavy copper pcb single double-layer pcb PCB Panel Chip Scale Package is a circuit board made with more than 4 oz of copper. This type of PCB is commonly used for high-density interconnect (HDI) applications.
HDIs are typically multi-layer boards built with conductive microvia connections, which are made by sequential lamination technique. They also include buried vias, which are not visible from the outer layers of the board.
- High-quality copper
Copper has long been used as an electrical conductor for a variety of applications, including telecommunications and electronics. This metal also possesses many other qualities, including superior ductility, flexibility, and strength.
It is often paired with other nonferrous transition metals such as brass and bronze, which are used for their durability and malleability. However, each metal has distinct characteristics that make them better suited for different tasks.
The anhydrous copper formate powder thus obtained is preferable to have a low content of impurity elements, especially alkali metals such as Na or K, sulfur and halogens such as Cl, in view of prevention of corrosion and deterioration of electrical properties due to moisture.
- High-density copper
The copper foil used in heavy copper pcb single double-layer pcb PCB Panel Chip Scale Package is usually thicker than the foil used in flex-PCBs. It is customarily expressed by its areal weight in ounces per square foot or Oz/ft2.
Thick copper foils can be used to achieve the electrical impedance and thermal dissipation requirements of the circuit board design. Foil above 1 oz (1.344 mils or 0.034 mm) is generally used for power circuits and foil over 3 Oz is common for heat spreaders and other applications.
The conductive pattern on the copper foil is etched to make the copper wires visible and to create the circuit connection between the different layers in the circuit board. Plated holes, which have plating in them to conduct electricity, are often used for component pins and vias to connect the traces on different layers.
- High-frequency copper
Printed circuit boards with high-frequency circuitry require PCB Panel materials that provide the lowest possible signal loss. This includes both dielectric loss and skin-effect loss, which is a function of current flowing into conductors.
Compared to dielectric loss, skin-effect loss gets larger as frequencies get higher. Fortunately, it can be compensated for by increasing the trace width.
The width of the copper traces (and therefore the surface area) helps to reduce skin-effect loss. However, it’s important to note that the resulting PCB stackup tradeoff will be determined by what type of dielectric and laminates you decide to use.
It’s also important to consider how rough the copper planes on the laminate are. Typically, thinner circuits will be more sensitive to the copper roughness.
- High-temperature resistance
A PCB is a stack-up of copper clad laminates which are bonded together and electrical currents and Chip Scale Package signals travel through copper traces and plated-through holes (PTHs) to connect different layers. It can be used for high-power electronic circuits.
Copper foil is a thermally conductive material that dissipates heat better than dielectric substrates. It can be used for thicker boards that need to withstand higher temperatures and power.
Resists are used to prevent metal from being deposited on a pattern, usually in the form of screened-on materials or dry film photopolymer resists.
A tented via is a via with a dry film solder mask covering both its pad and its plated-thru hole, thus completely insulates the via from foreign objects that may short. It eliminates wrinkle effects on the surface of the board during wave soldering and is a good choice for SMD assembly.
- High-speed copper
Ethernet over Copper (EoC) is a relatively new internet service that delivers effective data transmission services over ordinary copper wires. EoC offers high internet speed and reliability, and is more affordable than fiber internet.
EoC enables enterprises to avoid the costs of fiber installation and can deliver the same SLAs as fiber. Moreover, EoC provides the flexibility to accommodate growing business requirements.
Researchers at the University of Cambridge have found that twisted pairs of copper wires already in use for telephone lines can boost internet speed by three times. That’s a major advantage over fibre-optic cables, which are more expensive and harder to install.
In addition, copper has a higher conductivity than fiber. This could help it perform better in microelectronics and electric motors.