The printed circuit cards or wiring boards [also called as printed circuit boards (PCB)] make electronic devices work. A PCB assembly connects the electronic device’s components, avoiding the hassles of setting up a complicated connection of wires together. A PCB assembly makes the electronic components work together, at the same time. You can usually see PCB assemblies in motherboards, mobile phones, calculators, laptops and other devices that use electricity to work.
When Did It Start?
Printed circuit boards were discovered when issues from the complexity of using electronic devices and the traditional wiring method of these electronic devices emerged. The development of printed circuit boards started in the 1900s. Although in the year 1925, Charles Ducan submitted a patent for a method in creating the earliest circuit board, Paul Eisler, in 1943, was the one who was able to build a fully functional printed circuit board.
A point-to-point construction was used to assembly electronic devices during the time when printed circuit boards were not yet developed. To connect different electronic components together, wires are used and assembled inside the electronic device. Although the method was a success, the devices were usually bulky and broke down easily. Most of the time, the wires connecting the electronic components would lose their strength and break down due to wear and tear – which causes short circuit. When it comes to repairing any defective devices, the connectors for the cords of each electronic component needs to be replaced.
On the late 1920’s, the manufacturers of radios and gramophones have started to incorporate the usage of circuit boards – an insulated material is set up to fit the electronic components they need. Wires are then attached at the bottom of the device.
The use of printed circuit boards became extremely popular during the years 1950’s to 1960’s. There are a lot of inventors who set up different patents in order to improve the efficiency and performances of the circuit boards. During the first development of these circuit boards, the circuit can only be found at one side. However, after some developments, the multilayered board was made which allowed more circuits to be printed on both sides of a single board.
Components of a Printed Circuit Boar
Once a circuit board design has been set, the electronic components are placed using different holes that are also called as “plated through holes”. Once the electronic components are set into the hole, they will be soldered in place either manually or by using a machine. Each hole has a copper ring (also known as the annular ring) around it. For some circuit boards that are needed to be connected to another circuit board in order to create a bigger component, copper connectors are used.
In the event when the circuit board needs cutting or some of its parts need to be broken, a v-score is set onto it. The v-score is used to cut these certain parts without destroying the remaining parts of the circuit board.
To cover and protect all the copper circuits on the printed circuit board assembly, solder marks are used. Once a solder mark is placed, the PCB assembly will have the green color, which everyone commonly sees in circuit boards. The solder mark also prevents any solder jumps from happening in any case that a solder accidentally touches different copper paths.
There are also times when the components that are needed to be inserted into the printed circuit boards are placed differently. If the electronic components are not in the usual rounded shape, slots are used to add them into the circuit boards. To make the PCB assembly more organized, a silkscreen layer is also used to label each part for easy recognition.
The development of the printed circuit sheets was a major jump for the hardware and innovation commercial enterprises as it permitted electronic gadgets to be diminished to a more agreeable and reasonable size.Visit www.pcbnet.com for more details.