Shenzhen Leadsintec Technology Co., Ltd
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Shenzhen Leadsintec Technology Co., Ltd
Precision Assembly
Surface Mount Technology (SMT) is a technology that put electronic components directly on the PCB surface. This technology uses automated equipment to accurately place the tiny electronic components on the PCB pad, and complete the assembly of the circuit board through the process of backwalm or peak welding. SMT technology has high degree of automation and accuracy, can effectively improve production efficiency and reduce human errors, so it has been widely used in modern electronics manufacturing.
We are equipped with the state-of-the-art manufacturing facility and sophisticated machinery to support the fabrication. We also have highly trained and experienced personnel to make sure your job is done faster with high quality. Our capabilities in high quality SMT pcb assembly services include, but not limited to:
LST has set up the quality management system certified RoHS, IPC-600, IPC-610, ISO, IATF, and REACH for PTH and SMT PCB assembly.
We have 8 high-speed SMT mating lines，Daily production capacity exceeds 30 million points.We can quickly complete the customer’s order.
In-house manufacturing enables us to control the quality and costs as well. In addition, we have reliable suppliers who offer qualified materials at lower prices.
24-hour rapid response to provide you with one-on-one nanny consultant pre-sales, sales, after-sales tracking service, for you to answer any difficult questions.
An SMT assembly line is automatic, including a loader, solder paste printing machine, SPI (solder paste inspection) machine, high-speed and functional mounting machines with feeders, reflow oven, and AOI (automatic optical inspection).
The SMT PCB assembly process is:
A loader sends a PCB into the solder paste printing machine, where an SMT stencil is set up. A scraper presses the solder paste to pass the holes of the SMT stencil and print on the PCB pads.
The PCB printed with solder paste passes the SPI machine, which quickly scans the solder paste and compares the thickness, position, and size of the solder paste with the set-up parameters. It ensures solderability.
The PCB with solder paste goes into a mounting machine, where a feeder sends SMDs to a position, and the nozzles of the mounter move to pick and place the SMD to a designated PCB pad one by one. The high-speed mounter picks and places SMDs with small footprints, such as resistors and inductors, while the functional mounter picks and places SMDs with larger footprints, such as connectors and ICs.
The PCBA enters a reflow oven, where it is preheated and baked. The reflow temperatures change according to the reflow profile. The solder paste melts to release the flux, which activates to facilitate the soldering. At the peak of reflow soldering, the PCB pads, solder paste, and SMD pins form metallic compounds, which marks the success of soldering. After that, the temperature goes down. The PCBA cools down and forms permanent joints.
The PCBA passes the AOI machine, which scans the entire surfaces of the PCBA and compares it with the reference. The AOI ensures almost all surface defects are identified and rectified, including soder bridges, voids, tombstones, etc.
SMT technology will continue to maintain its important position in the future and show multiple development trends.
1. With the continuous improvement of the miniaturization and integration of electronic products, SMT technology will further develop to meet the demand for smaller and more powerful components.
2. Intelligence will become an important development direction of SMT technology in the future. SMT technology will apply artificial intelligence and machine learning technology more to achieve automated production.
3. The improvement of environmental awareness will promote the use of more environmentally friendly production methods. The SMT industry adopts surface assembly to reduce lead pollution and harmful waste in traditional welding processes, which is more in line with environmental protection requirements.
4. The continuous development of intelligent manufacturing technology, the SMT industry will gradually realize digitization and intelligence. This will help improve production efficiency, reduce costs, and improve product quality, thereby enhancing the competitiveness of enterprises.
1.LST has a strong engineering team and professional component procurement team. We are equipped with innovative technologies and advanced production equipment (tin paste printing machine, pickup machine, reflux furnace, AOI detector).
2.LST provides all -round services, including services before -sale, medium and after -sales. Our high -quality capabilities and service attitude can provide solutions as soon as possible when the customer needs. We actively solve each after -sales quality problem during the after -sales stage.
3. We have passed the UL ISO9001, Rohs/Reach and other certifications, which reflects our production qualification.
4.LST has 18 years of manufacturing experience and has won a good reputation in the industry. We provide one -stop PCB business for customers around the world.
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If you need small batch SMT assembly for prototypes, pilot runs, or early-stage product testing, Shenzhen Leadsintec Technology Co., Ltd. provides a complete solution. We specialize in low-volume SMT assembly designed for engineers, startups, and companies that need fast, precise, and cost-effective production—without committing to large order quantities.
With over 18 years of experience and advanced automated SMT lines, we guarantee high-quality assembly of SMD components for every industry, including consumer electronics, automotive, medical devices, industrial automation, and IoT.
Whether you need one prototype or a small production batch, we deliver fast, accurate, and affordable SMT solutions globally.
We help companies quickly turn PCB designs into functional samples. Our SMT lines can efficiently place miniature components on single or multi-layer PCBs with exceptional accuracy.
Perfect for startups and product developers who need flexibility.
Our automated SMT machines ensure consistent soldering, accurate placements, and on-time delivery for every build.
We ship assembled boards worldwide with reliable packaging and logistics support.
As a trusted SMT contract manufacturing partner, we support the complete assembly workflow—from PCB design review to component sourcing and final testing.
Every board we assemble follows best engineering practices to guarantee maximum performance and compatibility across all industries.
We follow strict international certifications to ensure reliability, safety, and global acceptance.
Every prototype and small batch undergoes detailed inspection, guaranteeing accuracy in each SMD placement.
This makes our service ideal for companies requiring consistent, high-precision SMT contract manufacturing for small orders.
Speed is crucial in product development, and we ensure your boards are ready on time.
Our quality control methods include:
From engineering setup to software optimization, each step ensures superior consistency, signal integrity, and durability of your SMD components.
Our small batch SMT assembly solutions help you reduce costs while maintaining premium quality.
You benefit from:
We supply globally, allowing companies to access reliable, affordable manufacturing regardless of location.
We support a wide range of industries, including:
Our experience across these sectors ensures compatibility, durability, and performance in every application.
Choosing Shenzhen Leadsintec means you get:
Our goal is simple: to make your small batch SMT assembly fast, accurate, and affordable.
1. What is small batch SMT assembly?
It refers to low-volume surface mount assembly for prototypes, engineering builds, or small production runs.
2. What is SMT contract manufacturing?
It is outsourcing your SMT assembly to a specialized manufacturer who handles design review, sourcing, component placement, soldering, and testing.
3. Do you support prototype quantities?
Yes—any quantity from 1 piece up to small batches.
4. What types of SMD components can you assemble?
We support 0201, 01005, BGA, QFN, CSP, SIP, and various fine-pitch components.
5. Can you provide turnkey SMT assembly?
Yes—we offer component sourcing, PCB fabrication, SMT assembly, testing, and delivery.
Whether you need prototype SMT assembly or small-run SMT contract manufacturing, we are ready to support your project.
Contact us anytime for a fast quote and expert guidance.
