A printed circuit board (PCB) is a board designed to connect electronic components together. These are used in almost all computers and electronics today.

The “paper” consists of a non-conductive material of electricity, usually made of glass fiber. Generally, copper is etched (drawn in thin lines) within the panel between the glass fiber layers or on the panel surface. This causes electricity to go only where it is required.

The electronic components are connected to this plate by a metal to conduct electricity. The metal etched on the plate allows electricity to flow from one component to another in electrical circuits.

The slabs can have many different parts connected and worked together. The most common cards are produced in large quantities for a specific job, for example for the operation of a computer, mobile phone / mobile phone or TV. Some circuit boards are designed to allow a person to build himself for a new electrical task. Most things that use electricity have at least one card that makes them work.

Flexible circuits are those that are thin enough and have good flex material.


When designing a printed circuit board, the main task is to determine where all the components will go. Normally, there is a design or scheme that will become a PCB. There is no standard circuit. Each plate is designed for its own use and must be sized appropriately to fit the required space. Panel designers use computer-aided design software to design circuits on the board. The distance between the electrical paths may be less than or equal to 0.04 inches (1.0 mm). The position of the holes for the component cables or contact points is also shown. Once the circuit diagram is presented, a negative image of the exact dimensions is printed on a transparent plastic sheet. With a negative image, areas that are not part of the circuit diagram are displayed in black and the circuit model is displayed in plain text. So the metal is removed from the open areas, usually with chemicals. This design becomes an instruction for a computer-controlled drill or automatic solder paste used in the production process.


The map is made with external layers of copper. The unwanted copper is removed, leaving copper wires that will connect the electronic components. The components are positioned on the plate, in contact with the cables.

  • Photoresists

Printed circuit boards are sometimes made with photolithography. A cover called photo protection reacts with light, so the printed circuit board and the cover are placed in a developer. This method is expensive per board, but very cheap to configure at the beginning.

  • Serigraphy

However, there are different methods to make a printed circuit. Some professionally produced printed circuit boards use a different method to remove additional copper from the printed circuit board. A process called silkscreen is used. Screen printing is when a fabric is pulled on a frame. Then, an image is printed on the fabric. Then the ink is pressed through the fabric. The ink does not go where the image has been printed on the fabric. This is called silk screen because the fabric is usually made of silk. The fabric is usually made of silk because it has very small holes. Silkscreen is used to print an ink called resistance on the board.

  • Milling

Another way to make a circuit is to use a mill. A mill is a drill that moves in multiple directions. The drill removes a small amount of copper each time it moves from one end to the other. The mill removes the copper around the cables of the board. This leaves extra copper on the board. Other methods do not leave too much copper on the board. This method is less expensive per table, but the equipment used is expensive. This method is not often used because the other two methods are easier.

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