Printed circuit boards are electronic components that are ordinarily found in all electronic devices and are soldered through printed circuits or wires. These are made up of conductors and copper, which are printed on the surface of the board known as a substrate. The PCB makes the device function with efficiency.
On Hole and Surface Mounting
The components of a printed circuit board are connected to the circuits using the two methods:
1. Hole Technology
Using hole technology is the first method. Each component is built using thin wires, and these are inserted into small holes in the substrate or surface. The component is then connected to the pads which are then attached to the circuits on the other side of the circuit board. The components are connected together to keep them in position. To put things in place, flux or glue is used to hold the components together.
2. Surface Mount Technology
Making use of Surface Mount Technology is the second method. With this method, you don’t have to drill holes on the board, but the placement should be very precise. The other type of circuits is the microchip or the integrated circuit. It is a small microscopic path of electronic components that is printed or planted on the surface of the chip of silicon material. It is an integrated circuit since all the circuits, and components are soldered together out of one silicon piece.
Knowing What PCBs are Made Of
The printed circuit boards are made of different materials. Below are some of the materials used in making a printed circuit board:
The conductor layers are made of a very thin copper and copper foil. The insulators are fused together using epoxy resin. Other materials used are the cotton paper and epoxy, Phenolic cotton paper, matte glass and woven glass.
Printed Circuit Board Related Products
The printed circuit boards are packed individually in a well-protected package to keep them secured and well stored. They are placed in a special storage for shipment purpose.
If in case the PCBs are manufactured for immediate purpose or by any electronic company, then the entire board uses a different process, or follows another manufacturing process. For instance, for a television company, the PCB is considered as a raw material and therefore, the manufacturing processes of these boards are only done once the entire television is finished.
All about Quality Control
The quality control is one important process in the production of PCBs. The quality check is carried out by using a special automated machine. It is used to detect any flaws by electrical and visual inspections. Some of the mistakes or flaws are as follows:
• Too much soldering carried out on a particular area
• Misplacement of different components or parts.
• Excess reflow of the solder during the process, etc.
The Printed circuit boards also undergo an environment test. This is done to test the capability and the performance power of the PCB. The test will determine if it can withstand the heat, humidity and other extreme condition of the environment. The test is conducted so that the printed circuit boards meet the needed functional requirements.See more details on www.pcbnet.com about pcb designing and assembly of pcb components.
Some of the materials used in manufacturing the circuit boards are hazardous and toxic to human beings. For instance, lead is used in making the electrical connectors on the PCB. The fumes which are produced during soldering are bad for humans, thus the entire operation is done in a safe and close setting with all the safety gear and measures are observed. The fumes are discharged carefully into the atmosphere without causing problems.