Electronics

CAD, otherwise known as computer aided design, is used a lot in the design stages of developing printed circuit boards. More and more modern electrical engineers employ CAD in order to cut costs and save time. Indeed, modern versions of CAD allow engineers to construct incredibly interesting and elaborate circuits which would cost millions upon millions of dollars to build in the laboratory.

You can use a CAD program to develop circuits that cant even exist in the real physical world. Of course, the real utility of the software is that you can try out design schematics virtually at no cost to you. Indeed, by taking the time to check to see how compatible your engineering intuition is with reality, youll save PCB manufacturers many headaches and cut costs for your company.

Creating a PCB with a CAD Program
Transferring designs from your CAD program to the manufacturer is relatively easy. The industry standard file for moving data is known as a Gerber file. You can use Gerber files to transmit incredibly detailed parcels of information about the size, shape, connectivity, and flexibility of your PCB. Of course, its a smart move to go over the final designs with your manufacturer before you move to the fabrication stage.

What does the future hold for CAD technology? Many industry watchers believe that computer aided design will soon allow electrical engineers to test out far more complex circuits, thereby allowing them to work with manufacturers prior to fabrication to come up with better mass production techniques. Already, major PCB manufacturers and designers are working in tandem to make this a reality.

PCB design consultants are experts at optimizing circuits per your application. To an outsider, the techniques PCB design specialists use may seem like magic. However, there is a method to the madness. PCB design consultants use computer aided design software and well known algorithms to compute precisely how a circuit board should behave in the real world.

Indeed, if you want to manufacture a board for an application (like a computer or a large memory chip) it may be a smart move to work with consultants during the earliest stages. After all, it wont cost your company that much more to hire the services of these experts. Many manufacturers these days hire out their own design consultants to encourage producers to work with them.

Working with PCB Consultants
So what can you do to make the design process smoother? First of all, make sure that both the engineers and the manufacturers are up to speed on what constitutes appropriate specs. For instance, many times, both sides disagree as to the specifications for copper sheet length and substrate conductivity. After all, copper is not a perfect conductor; nor is the epoxy substrate used in most circuit boards a perfect resistor.

Since modern PCBs are so small and delicate, its important to maintain them carefully during the design and fabrication process. Most manufacturing facilities go to incredible lengths to keep their fabrication rooms clean. However, impurities sometimes gum up the works. Thats why its helpful to design PCBs that are a little more rugged, so they can be easily combined with electrical source circuits in the final product.

PCB design services allow you to develop unique and far reaching solutions for your computer chip technology. Already, major manufacturers and producers are collaborating to create exotic new kinds of PCBs. These unique kinds of experimentation will hopefully lead to whole new methodologies of creating low-cost circuit boards that can be used in mass production.

What are some major constraints on PCB design? First of all, in general, the more complicated the manufacturing process is, the more expensive it will be to make your PCB. Thus, if youre working from a shoestring budget, you might want to eliminate all the bells and whistles and focus on precisely what needs to be optimized. For instance, get rid of any THT technology, and focus on single sided or double sided boards.

Active PCB Design Implementation
On the other hand, if you want to push the design envelope, you might want to look into more sophisticated kinds of multi-layer boards. While manufacturers generally discourage designers from building circuits with lots of internal plated drill holes, otherwise known as vias, sometimes the designer has no choice but to include these connections. After all, buried and blind vias allow designers and engineers to create far more elaborate and dense circuit solutions.

While many PCB designers use computer aided design, some still rely on hand drawn diagrams. Drawing up schematics is the hardest part of the process, as you must take into account not only the physics of the electronics but also the manufacturing specs and restrictions. After all, youre not coming up with a theoretical engineering design; youre coming up with a solution that producers will hopefully put into practice.

Intelligent PCB design software can help you find solutions in seemingly impossible places. Of course, its important to constrain your CAD software, so that you wont get impossible to manufacture solutions. For instance, if you attempt to optimize a certain variable without putting in due restrictions, the CAD may suggest that you use a PCB board with half a dozen vias, buried, blind, and otherwise.

At the same time, if you input too many constraints on your PCB software, you may slow down the calculations to a crawl. Ideally, you want your software to be able to assist you, both in terms of calculating the design and in terms of aiding you with visualizing the ultimate circuit. Since PCBs are three dimensional circuits, it takes a skilled eye to recognize trouble spots and intuit bad electrical engineering.

Designing PCBs with Software
There are many standard tests which your PCB design software can perform. However, its a good idea to have an experienced electrical engineer on hand to guide you in the right direction. After all, especially when youre attempting some new manufacturing idea, you may not have the tests preprogrammed to pick out the problems that youre most likely to encounter.

At the end of the day, a more rigorous diagnosis of your schematics will lead to cleaner production and cheaper manufacturing. Be that as it may, however, dont let your focus on the bottom line prevent you from being creative and trying new things. When youre still in the design stage, you have the liberty to use as many permutations as you want. Oftentimes, it takes a while before you and your software CAD stumble on the right idea.

Professional PCB designers should be thoroughly familiar with the kinds of metals, components, and specs which go into circuit boards. However, it seems like every month, new PCB components, metals, and the like are developed in the laboratory. So how can you make sure that your PCB design is state of the art, given that so much new information accrues every week?

Generally, you need not worry about esoteric PCB alloys and components unless youre trying something really experimental. In most cases, what you should worry about is how to optimize construction without sacrificing the quality of the product. Engineers have a difficult time, because they are expected to produce great products using minimal technology in the final manufacturing.

Professional PCB Designers
Given the crush of interest in PCB boards, its no surprise that the nations most prestigious computer and aeronautical manufacturers refuse to share their secrets for fabrication. After all, circuit design is more of an art than it is a science, and companies dont want to give up proprietary designs. Thus, in many cases, you may have to reinvent basic strategies for fitting more computer power on your circuits.

The process by which PCB designs are fabricated into boards can take anywhere from hours to months, depending on what kinds of drills are necessary for the construction and whether or not manufacturers need to employ specifically tailored alloys. If you can keep the manufacturer up to speed as to what you have in mind for the design, that will make life easier for everyone. However, dont sacrifice quality for price.