Leading the way for over 40 years
Mer-Mar Electronics California based SMT PCB manufacturer who has 4 decades of experience in providing high-quality SMT PCB assembly in the USA. We have been using the highest quality solder mounting equipment with custom capabilities for the accurate placing of components onto your circuit boards. Our keen engineers have proven efficiencies in creating miniature assemblies and have state-of-the-art facilities for mounting components accurately onto the PCB surface.
We have engineered our assembly for high mechanical strength, flexibility, durability, reliability, and high performance. We focus on meeting the current and future trends to adapt to the technological changes seamlessly and adopted it along with traditional techniques like Through-hole technology. We pay careful attention to note down and respond to the users’ requirements. Whether you need a low volume or high volume, semi-automatic or fully automatic SMT assembly, we have a system in line with meeting your throughput & budget requirements.
SMT PCB assembly company provides
1. High-Efficiency
Mer-Mar Electronics’ surface mount assemblies’ operations are flawless and done with precision. We are constantly improving the efficiency of circuit board manufacturing.
2. Minimal Knock-on Effects
By improving the production efficiencies, we strive to reduce the knock-on effects that can have serious negative repercussions on business especially when you go for large batch sizes where the impact would be massive.
3. Specialized in Miniature Products
We are skilled in building SMT assemblies those are small in size but run super smoothly while integrating numerous components. We thus have become experts in facilitating lightweight and portable electronics.
4. Error Reduction
By the use of automated SMT of components into high-quality PCBs ready to go into production, we are speeding up the production rates and also reducing the margin of errors during the manufacturing.
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SMT PCB assembly capabilities
Mer-Mar Electronics has a state-of-the-art assembly plant that allows us to manage your project through beginning the assembly process diligently. We are capable of fulfilling all PCB assembly types and sizes needed from basic and traditional Through-hole PCB Assembly to standard Surface mount PCB assembly to ultra-fine pitch BGA assembly. We specialize in offering SMT PCB manufacturing services from small volume to medium/large production volumes. We are also capable of performing single and double-sided SMT assembly placement of all component types. We can accomplish wave soldering using cutting-edge equipment.
Our SMT Assembly capabilities include –
- Full SMT Assembly line
- Single and double-sided Assembly
- Mixed Technology
- Low to high volume production assembly
- ESD controlled area
Mer-Mar also offers the smallest and compact components capable of providing varied customer needs including –
- Smallest components 01005, 0201, 0402
- Assemble 0.25mm fine pitch parts
- Leadless components, BGA, µBGA, LGA, package on package, etc.
Major Pieces of Equipment | |
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Juki JX-100 SMT Pick & Place Machine | |
Specifications | 6 heads with laser alignment, 14,400 components per hour small chip 8mm or less Placement points per program 2,000 |
Applicable Component Sizes | Height: min: 0.3mm max: 6mm Size: min: 0.75 x 0.5mm max: 33.5mm sq Lead Pitch: 15 mil |
Applicable PCB Size | min: X 50mm x Y 30mm max: X 330mm x Y 250mm thickness min: 0.4mm max: 4mm |
Zevatech FS-750 SMT Pick & Place Machine | |
Specifications | 3 heads with laser alignment, 8,000 components per hour small chip 8mm or less Placement points per program 2,000 |
Applicable Component Sizes | Height: min: 0.3mm max: 6mm Size: min: 1.0 x 0.5mm max: 23.5mm sq Lead Pitch: 15 mil |
Applicable PCB Size | min: X 50mm x Y 30mm max: X 330mm x Y 250mm thickness min: 0.4mm max: 4mm |
Zevatech PM-570 SMT Pick & Place Machine | |
Specifications | Single head with laser alignment, 3870 components per hour max rating Placement points per program 2,000 |
Applicable Component Sizes | Height: max 6mm Size: min 1.0 x 0.5mm max: 33.5 sq Lead Pitch: 15 mil |
Applicable PCB Size | min: X 30mm x Y 30mm max: X 406mm x Y 330mm thickness min: 0.6mm max: 2.5mm |

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Various industrial applications of SMT PCB assembly services
As the Surface Mount Technology picked up momentum, there has been a constant increase in the usage of this technique across a multitude of industries. The market share of SMT services has been increasing by the day.
Some of the industries that utilize Mer-Mar Electronics for SMT PCBA are –
- Aerospace
- Consumer Electronics
- Defense
- LED components
- Medical and Health care
- Transport and Automotive Electronics
- Telecommunication & Mobile communications
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SMT Assembly Techniques
SMT assembly is different from the through-hole technology and it requires different SMT equipment. We not only have the requisite equipment but also the experience and expertise for providing varied techniques. Also, for a majority of the SMT parts on a PCB, we go for pick-and-place equipment for assembling.
We first prepare the raw boards and the components for production after a thorough validation by our inspection teams. Once we gather these, then we prepare the boards for assembly.
Screen Printing Process
We use this method for applying the solder paste to the SMT pads on the board using a stencil that we design from the CAD output file used to build the raw PCB. These boards then conveyed into the reflow soldering process where we take every measure not to cause damage to the boards and components due to high temperatures.
We provide different reflow soldering techniques like infrared reflow, hot gas convection, and also vapor phase reflow. We also comply with RoHS guidelines and hence adhere to the tighter controls on the soldering in this process. We repeat this process on the 2nd side as well. We also have massive experience in the wave soldering process as well.
Once we finish the soldering process, the PCB Assembly cleaning needs to remove any flux residues and any stray solder balls that may potentially short out the closely spaced component leads. We have SMT solvent cleaning machines for this purpose.
Solder Paste Inspection
After applying the solder paste, we run the boards through solder paste inspection for evaluating the paste location, the physical volume of the paste, and other key indicators.
The SMT techniques differ as per the soldering methods and assembly.
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SMT Assembly Testing Capabilities
Mer-Mar Electronics makes it mandatory to perform visual inspections to see if there are any missing or misaligned components or issues with solder bridging. Besides, manual inspections, we also use SMT inspection machines for this purpose. If any fault is found during this rigorous inspection process, we send back the board for rework. Once the rework is done, we once again test the boards to verify if everything is working correctly.
We make sure no mistake has been made and that all parts are in the right place by using an AOI machine. As the 3D technology rolled out, we also started going for it instead of 2D inspection and avoided any false calls. With 3D inspection, we go for accurate measurements for a more stable inspection process.
Different Testing Services during SMT Assembly
Automated Optical Inspection
For pre- and post-solder to identify the component presence, placement, and solder quality.
After the component placement, we perform an automated optical inspection to make sure that all the components are mounted in the right place. We use AOI machines for verifying the components’ placement, orientation, and polarity.
We also perform a post-reflow AOI to make sure no mistakes are made and then we perform an X-ray inspection for the process verification.
X-ray Testing
We go for this test to check on leadless components through an x-ray image of them and the solder joints to make sure that everything is working as expected.
In-circuit Testing
Through this, we look for any joint failures and we perform this through bed-of-nails tests.
Functional Testing
We perform this to ascertain PCBs will work productively and as per the requirements after the SMT assembly. With testing, we ensure the quality of delivered range of SMT PCB assemblies.
SMT PCB Assembly FAQs
Looking for SMT PCB assembly, SMT SMD PCB, Surface Mount assembly or any custom SMT PCB from Mer-mar Electronics? Send us inquiry to Get a Quick PCB Assembly Quote based on your custom requirements.
If you have any queries regarding to our SMT PCB assembly or need an urgent assistance, then please don’t hesitate to contact our team of skilled personnel’s. Send us an email with your queries at sales@mermarinc.com or call us at (760) 244-6149. We are looking forward to hearing from you.