Printed Circuit Boards (PCBs) are self-contained modules of interconnected electronic components that can be found in most electronic devices and are used to mechanically support and electrically connect electronic components. Printed Circuit Boards often contain components such as capacitors, resistors, transistors and diodes. The Printed Circuit Board manufacturing process involves usage of various materials and technologies used to create Printed Circuit Boards for onward usage in various electronic devices ranging from household electronics to advance level high tech computing machines.
Prerequisites for Printed Circuit Board manufacturing process
If you intend to complete Printed Circuit Board manufacturing process, then you need to meet a number of prerequisites. Some of the most important things which a person need to have in order to be able to perform the Printed Circuit Board manufacturing process include the equipment required to perform the process, a substantial amount of labor and all the raw materials that are needed to create/assemble Printed Circuit Boards. Thus PCBs have become an integral part of today’s life because of extensive usage in devices of daily use.
What raw materials does a person need to perform PCB assembly?
As stated before, a person also needs a number of raw materials in order to perform PCB assembly. What raw materials does a manufacturer need create Printed Circuit Boards, you ask? Well, following are the raw materials which are required to complete the Printed Circuit Board manufacturing process:
The first and most important raw material that is needed to manufacture Printed Circuit Boards is the substrate. The substrate is the material that the circuits are printed on, that’s why it is so important. You can choose from two different substrates- the fiberglass, epoxy resin with a copper foil bonded or paper reinforced phenolic resin with a bonded copper foil.
The printed circuits on Printed Circuit Board are made of copper. Therefore, you need copper sheets in order to create Printed Circuit Boards. The copper from the copper sheets is either plated or etched away on the surface of the substrate a person decides to use to leave the desired pattern.
Tin-Lead is quite an important raw material required to create PCBs as it has two quite significant uses. First of all, the copper circuits on a Printed Circuit Board are coated with a fine layer of Tin-Lead in order to prevent oxidation, which is quite a meddlesome problem. Secondly, contact fingers on a Printed Circuit Board are initially coated with Tin-Lead, followed by a couple of other metals to ensure optimum conductivity.
Once the contact fingers on a Printed Circuit Board have been coated with Tin-Lead, they also need to be coated with Nickel, making Nickel another raw material you need to have in order to create Printed Circuit Boards.
Gold is another one of the raw materials required for manufacture printed circuit boards or PCB assembly. The contact fingers on Printed Circuit Boards are coated with gold in the end for excellent conductivity.