Any medical device should be compliant with healthcare regulatory mandates as well as offer exceptional performance that meets its intended purpose. But this is largely dependent on the quality of the surface mount assemblies used in the device.

Therefore, it is important to have a Design for Manufacturability analysis completed on the design of any medical device electronics. But this test is only effective if you know what to look for. With that being said, here are the top considerations for evaluating your medical device electronics design.

Placement of the Components

If the components of a PCB are designed at odd angles or have been placed too close to the edge of the board, then it often results in the electronics needing to go through a costly retooling process before they can proceed with any production. Therefore, the placement of the components is incredibly important, especially before production begins.

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Designing and manufacturing surface mount assemblies requires a unique technology. Known as Surface Mount Technology, or SMT, this method is what engineers use to produce electronic circuits found in components placed or mounted directly onto the surface of printed circuit boards. Once completed, the product is known as a Surface Mount Device, or SMD.

Today, the through hole technology is often replaced with SMT. Instead of fitting components with wire leads that go through holes in the circuit board, most manufacturers use the more updated process. Keep in mind that for surface mount assemblies, experts still use both technologies, but the through-hole process is typically saved for components deemed non-suitable for surface mounting, including heat-sinked power semiconductors and large transformers.

Cable assemblies come in a variety of options to include multi-conductor, coaxial/RF, wire and cable harnesses, complex military, flat ribbon, custom electro-mechanical, and more. Although there are similarities, there are variations as well.

For instance, surface mount assemblies, which are sometimes referred to as wiring assemblies or cable harnesses, consist of a group of cables, wires, and sub-assemblies used for transmitting electrical power or signals.

However, there is an actual cable assembly that should not be confused with a harness assembly. The primary difference between these is that a harness has numerous branches and ends that run in different directions and on each branch are multiple terminations whereas with a cable assembly, there are just two ends.

Among harness assemblies are different types, one being basic. Depending on the exact product, this might include only three discreet components whereas a classic type harness could be designed with several more, as well as various other components that are passive or possibly active. Usually, there are dozens of wires and in some instances, hundreds of unique terminations and components.

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