Keypads that utilize dome switches, silicone elastomer keys, or tactile switches rely on actuation force as a critical feature to define how much load is required to close the normally open switch. In this context, force is a vector acting normal to the keypad surface and is usually defined in grams (g) or pound force (lbf).
Stiffeners are a key design element in most flex designs and have a significant impact on both the performance and reliability of the finished flex circuits. As a result, stiffeners need to be fully and accurately defined in the data set. Not doing so may result in a finished part that does not meet your requirements.
Many of today’s rigid-flex circuit designs utilize the same high-density components found in rigid PCB designs. This requires the use of blind and or buried vias to allow the signal lines to be routed out from within the high-density components or the high-density areas of the design. The most common component that we see driving this today is the 0.4mm pitch BGA package.
We're all aware of the far-ranging uses and necessity for cables within electronics. With their widespread use and cables' inherent sensitivity to electromagnetic energy, the shielding methodology of a cable can be even more important than the conductor and jacket specifications.
While it's true that The Institute of Electrical and Electronics Engineers (IEEE) has long issued a series of recommended standards for electrical and electronics design, those standards do not actually specify wiring color purposes in the way that a lot of people think they do. This is surprising given that those standards do contain extensive discussion on wiring and power cables.
If you were to ask 5 separate people to explain the definition of keypad, likely you would receive 5 completely different answers that all center around the same basic concept. According to Wikipedia a keypad is a set of buttons arranged in a block or "pad" which bear digits, symbols or alphabetical letters (source https://en.wikipedia.org/wiki/Keypad). While this definition is correct, when communicating to a potential user interface supplier the term keypad requires further elaboration.
Look around at your desk, work station, or wherever you’re siting while reading this blog post. The odds are favorable there are multiple cables within reach right now! It’s true, everyone needs and uses cables. Not just in one’s personal life, but also in the workplace, in industry, and even in combat.
There remains a misconception that borders on a cultural stigma towards off-brand or knockoff items. Consider your favorite breakfast cereal at your local supermarket as you walk down an aisle lined with name brand cereals strewn with cartoon characters and slogans, you may notice a less expensive version of the same exact cereal a few shelves lower. These off-brand cereals likely taste the same, have identical ingredients, but cost about half as much. Admittedly, my children prefer the name brand cereals, but when replaced with an off-brand equivalent of Special Popcorn Cereal, if I don’t show them the box, they will never know the difference.
Most test engineers agree that if you were to make a list of the major causes of compliance failures for most of the electronic products we use in our daily lives, radiated emissions (RE) would, undoubtedly, be right at the top.
Nobody wants to experience the feeling of populating your new printed circuit board (PCB) design and finding out that it is not electrically functional. Most often, the lack of functionality is attributable to a specific production problem or a combination of several different problems. Sometimes, however, the problem is that the Gerber files exported from your PCB CAD program contained an error that went unnoticed because there was no way to verify that the files matched your design intent. You can avoid a good deal of trouble by supplying an IPC-356 format netlist file with your fabrication data package.