Surface mount technology (SMT) was originally called “planar mounting” and was first used by IBM in the 60’s to design small-scale computers. This technology was eventually adopted for use in guidance systems in the space program and has been constantly improving since.
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SMT produces electronic circuits in which the components are directly mounted onto the printed circuit boards (PCBs). Surface-mount devices (SMDs) are the result. This technology replaces through-hole using wire lead component construction. Many components for SMT, often referred to as surface mount devices or SMDs, are smaller and lighter than their counterparts because they have short pins, smaller leads (or no leads at all).
Smaller size and reduced weight are the two main advantages to SMT. Components can be aligned closer together and end products will be more compact and lightweight.
Here are additional benefits of SMT:
– The solder surface tension forces components into alignment with solder pads. This reduces placement errors.
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Smaller-sized SMDs or components have a lower cost than their larger through-hole versions.
– You can combine through-hole and SMT manufacturing on the same board for greater functionality.
– Smaller deliverables with lower lead induction gives you a small radiation loop area for better electromagnetic compatibility.
– With standardization of design and components, fabrication can be automated.
– Circuit boards don’t have to be drilled for assembly.
– Most manufacturers rate this the number-one benefit.
– High-frequency performance reduces unwanted consequences of RF signals.
– Reduced/eliminated drilling and shorter set-up times increase the speed of manufacturing.
– High-end components are more versatile.
– More components can be positioned using both sides of the circuit board, creating more connections for each component. Fewer circuit boards are needed for devices.
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– Soldering can be customized. Components are attached with a solder that is also a glue.
– Better performance delivery is realized with shaking/vibration mechanical conditions. SMT connections are more reliable.
Design for manufacturing (DFM) software gives circuit designers the foundation for their surface mount technology component placement and production. The software helps designers to consistently meet stringent industry quality standards. This is where functionality and design features should merge.
Surface mount technology has led to much easier electronic circuitry creation and production, especially important in complex circuits. This higher level of automation has saved time and money throughout our industry.
Industry standards for most SMDs have simplified design and manufacturing considerations to work in harmony, producing PCBs of consistent quality with automated manufacturing processes. These PCB production efficiencies reduce (and simplify) change requirements while the shorter lead times make our customers more competitive.
Surface mount technology (SMT) is an alternative to older through-hole (TH) printed circuit board (PCB) design and manufacturing. Even when there are reasons to use through-hole components on your PCB, surface mounted components almost always win. In fact, almost all equipment manufactured commercially uses surface mounted technology.
Let’s learn more about how surface mount components compare to through-hole components and the reasons to use surface mount technology during PCB manufacturing.
What is Surface Mount Technology?
During the 1970s and 1980s, automation started to rise for PCB assembly. Traditional components with leads were not easy for PCB assembly. Instead, resistors and capacitors needed to have pre-formed leads so that they could fit through holes.
Even though this was the preferred method, it was a difficult approach to master. Leads often missed the holes because they were very tight, slowing down the PCB assembly process and raising manufacturing costs.
Thankfully, surface mount technology was born. Rather than having to wire between two points, SMT components are set onto a board and then soldered to it. Their leads do not have to go through any holes as would be required in a traditional leaded component.
Benefits of Surface Mount Technology in Design
SMT allows for more efficient, automated PCB assembly and mass production. This is why virtually all equipment commercially manufactured today uses surface mount technology. Let’s explore the main benefits of using this technology:
SMT for Printed Circuit Board Assembly
Sonic Manufacturing provides PCB assembly and manufacturing services in Silicon Valley. We are experienced in both surface mount technology and through-hole. For the most part, most components on a board are placed automatically. Occasionally, they may need manual intervention. Either way, you are in good hands with our team!
Because of our efficient and automated processes, you can expect your PCB assembly to be completed on time and according to your budget. You can count on us for exceptional service and reliability! Contact Sonic Manufacturing to learn more about incorporating high-quality surface mount technology into your PCB components.
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