Do you know what constitutes a printed circuit board

Do you know what constitutes a printed circuit board

Current circuit boards, mainly composed of the following

Line and surface (Pattern) : the line is used as the guide tool for the original, in the design will also design large copper surface as grounding and power layer. The line and the map are made at the same time.

Dielectric (Dielectric) : used to keep the insulation between the lines and layers, commonly known as the substrate.

Hole (Through hole/via) : guide hole can make two or more layers of conducting lines each other, larger guide hole is used as parts plug-in, in addition, there are the guide hole (nPTH) is usually used as surface-mount positioning, fixed screw assembly.

Prevent welding ink (Solder resistant/Solder Mask) : not all the copper surface to Solder on the parts, so the Solder area, can print Solder material cut off a layer of copper surface (usually) of epoxy resin, avoid the Solder short circuit between the lines. According to the different process, divided into green oil, red oil, blue oil.

Legend/Marking/Silk screen: this is a non-essential component. The main function is to mark the name and position of each part on the circuit board to facilitate the repair and identification of the parts.

Surface Finish: it is easy to oxidize because of the copper Surface in the general environment, causing it to be unable to go up to tin (soldering tin), so it will be protected on the copper Surface of tin. The methods of protection include: (HASL), (ENIG), Silver (Immersion Silver), Tin (Immersion Tin), organic flux (OSP), and various advantages and disadvantages, which are referred to as surface treatment.