Not sure what the difference is between M2M & IoT? In this video we explain the difference between the two and where NetComm Wireless sits in the ecosystem. Source
Internet of Things PCB things to consider for Startups
Because IoT appliances are so recent, you would think that getting an IoT printed circuit board (PCB) project off the ground starts by reinventing the wheel and suffering a large amount of technical problem. That is most certainly not the case.
Nevertheless it doesn’t imply IoT startups have a certain method to fame. Facing them is quite a lot of design and manufacturing concerns that are different to these small products. These points are required to be considered for the fresh IoT product to achieve its purpose.
On the plus side, it’s necessary for IoT startups to recognize that the foundation for a successful awesome product exists. This suggests experience and knowhow regarding the design, fabrication and assembly of these types of cutting-edge products are out there. And the best advice is for sensible IoT product enterprisers and leaders to listen to the counsel that seasoned electronics manufacturing services or EMS vendors are offering. These companies and their engineering team members already have undertaken the job with groundbreaking IoT businesses in Silicon Valley entering into the very first of this surfacing sector.
The PCB of an IoT unit is a unique beast than the traditional one, which is considerably larger and flat. IoT gadgets, alternatively, are comprised generally of either rigid-flex or flex circuit assemblies, which include their own categories of design layout, fabrication and assembly points and detailed aspects.
A foremost concern is to seek experienced designers who’ve undertaken a great deal of rigid-flex PCB designs. PCB space for an IoT unit is limited. So you’d like the designer to have direct layout expertise to properly design crucial components on that small area.
Also, almost all IoT systems are not fixed; they obtain significant movement and rotating. Right here, the experienced designer plays a significant role in calculating bend ratios and lifecycle iterations as a vital part of a design. Additional crucial design layout points comprise of signal trace thickness, number of rigid and flex circuit layers, copper weight and stiffener placement. Stiffeners are utilized on flex circuits to ensure components installed on the flex circuit stay properly constantly in place to stay away from movement.
An additional concern is through-hole component placement in rigid-flex circuits. Why’s that significant? A lot of IoT devices are founded upon surface mount device(SMD) placement. However , there could be through-hole components, which are often designed into either the rigid section or the flex portion of the board. Through-hole components are in most cases helpful to communicate input/output or I/O signals to the outer world. Doing this, those signals can be displayed using an LCD or LED monitor. Through-hole component placement is an important concern in an IoT item considering that when used on the flex section of the board, right stiffeners need to be designed and employed for appropriate assembly.
Lastly in the layout category, the heat that components deliver is required to be thought about. IoT systems are starting to be difficult with rigid-flex and flex circuits featuring up to 12 – 14 layers. Some systems are digital. However , progressively analog products are being exercised in IoT products. Analog circuitry cranks out much more heat than digital ones. It really means heat expansion and then contraction rate ought to be taken into account. In tech lingo, this is actually often called the Coefficient of Thermal Expansion or CTE and the good management of it.
Selecting the best fabricator is critical and is linked to the EMS company you’ve selected. The fabricator you expect has to have IoT PCB fabrication experience. Amongst crucial points here are guaranteeing durable adhesions between layers on both rigid and flex circuit sides, learning all the vital calculations and getting a robust understanding of when current moves from the rigid side to the flex side.
Such fabricators also must possess an in-depth comprehension of really small parts like 0201 and 00105 device packages, package-on-package, and the utilization of fine-pitch ball-grid array or BGA packaged devices.
In addition they should have expertise in designing boards with pretty tight tolerances in terms of footprint for those types of BGA devices, in terms of up-to-date capabilities like laser direct imaging for putting the solder mask on the board. They need to have laser drills for via drilling with sizes of 5 mils or under as these IoT products could be so small that a common drill size of 5 to 8 mils might not be enough. They could need to go to a 3 mil, which indicates that you should get an enhanced laser drilling capability in house.
In the event you’re placing via-in-pad, it is a easy way to take advantage of the small land which is available on the rigid-flex board, yet it creates trouble for assembly. If vias aren’t fully planar or flat in shape, it might be challenging through the assembly of those tiny BGA packaged devices. This comes about because non-planar surfaces can easily threaten the integrity of solder joints.
At times via in pads leave bumps when they’re not scoured properly after having the vias and gold finish on the top. When there are bumps, then the solder joints in the assembly for those tiny BGA balls in those IoT devices may not be an excellent joint. It may create sporadic connections, which might be a greater issue to treat and mend. It all boils down to which EMS company you are using because they’re the ones who will find the fabrication facility to make a lucrative IoT product for you.
It’s critical to go to experienced EMS companies that have correctly assembled IoT and wearable PCBs as they have special tooling and fixtures readily out there, which are required for assembly to assure components are placed properly, exactly and the printing is accomplished in the right way.
Printing could be a concern for IoT products. If it’s a rigid-flex board, then you will find there’s a change between thicknesses of the rigid and flex circuit portions, indicating a special fixture is required to keep the complete rigid-flex board planar or fully flat to make effective printing to be carried out.
Startups should be set to pick the correct manufacturing partners and EMS enterprises. By doing this they can be sure that they’ve enough experience before hand to get the multitude of design, fabrication and assembly details successfully performed since they are essential to a profitable and punctual IoT product launch.