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Printed circuit boards were invented over 75 years

by:Luteng CNC Parts     2020-09-09
Today most printed circuit boards are made by creating an electronic diagram of the desired circuit using software. The software makes designing custom circuits much easier and faster. The generated circuit can be directly printed onto the circuit board during manufacturing. Photoengraving is the most common manufacturing process, where the track of copper is etched out from the board using a process called photoengraving. Once the board has been photoengraved with copper, the electronic components and leads must be installed. Installation is done by drilling holes into the board and then filling the holes with an electrical connector, a rivet or electroplating the hole, which forms an electrical connection from the components to the different layers of the board. After drilling and adding components the board is coated with a solder or gold material. The last step, screen-printing, is optional and may be an additional cost but is important. This is where the key to the components are printed directly onto the circuit board. Printed circuit boards are typically tested before shopping to make sure there are no shorts and the board functions properly. Always use reputable companies to make sure you get a quality printed circuit board. This may involve going to an offshore distributor for the correct components and type of assembly most appropriate for your application. Like so many other things, do it right the first time, and have a quality company help you with your printed circuit board needs. If you are starting a new electronic project without professionally printed circuit boards, but need a prototype circuit board to get your ideas off the drawing board and onto the boss's desk, you may be tempted to grab a blank perforated circuit board off the shelf and start soldering connections. The result may or may not work but either way you will probably be left with a mess of wires that looks like a disaster, took much too much time to assemble, and will be impossible to easily replicate for mass production. Although your prototype PCB may work, chances are you did not consider some basic design specifications that could result in excessive manufacturing costs that you could have saved if you would have had your prototype circuit board professionally printed. Most beginning PCB designers don't consider cost optimizing designs that could make a huge impact on your bottom line when the product goes to market. Some important considerations include: Make sure to use a standard board shape. Irregular shapes and internal cutouts add extra manufacturing and mounting costs. Keep the size of your board area to a minimum. Typically board price is proportional to board area so it is worth your time to consider a board designer that may be able to maximize functional space on your board. Small holes are expensive; always try to utilize designs that require holes larger than about 0.4 mm in diameter. Smaller holes usually require more precise and expensive machinery so it is important to consider type of manufacturer you might be using and extra costs associated with smaller holes. So if you are new to printed circuit boards it is important to realize that your design may not be optimal in terms of costs of manufacturing. A good idea may be to get your prototype and eventually your production PCB professionally printed. Not only will professionally manufactured PCB companies be able to help you with your design and figure out ways to help you limit your production costs, the boards will undergo quality control and will have much longer functional life, saving you money in repairs and replacement boards.
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