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Trusted PCB Assembly Manufacturer in China

As a one-stop PCBA manufacturer, SEIC has over 20 years of industry experience. We deliver high-quality PCB assembly, design, and end-product manufacturing with precision and reliability.

ISO Certified
99.5% Delivery Pass Rate
24/7 Technical Support
Get a Quote
High-Density PCB
12,000+
m² Factory Area

Our Services

From concept to completion, we offer comprehensive electronic manufacturing services with strict quality control and rapid turnaround.

PCB Design

Complete schematic and layout design with DFM analysis.

SMT Assembly

7 fully automatic SMT lines for high-speed precision mounting.

PTH Assembly

20 dip multi-automatic lines for through-hole components.

BGA Assembly

Advanced reflow and X-ray inspection for BGA packages.

End Product Assembly

Full-box build, packaging, and logistics support.

Our Products

High-quality electronic assemblies serving diverse industries including healthcare, consumer electronics, and industrial automation.

Eye Instrument

Eye Instrument

Precision optical devices for medical diagnostics with high-reliability PCBs.

  • High-density interconnect (HDI) design
  • Medical-grade component sourcing
  • Strict ESD control during assembly
Weigh Scale

Weigh Scale

Electronic weighing systems with precision analog signal processing.

  • Low-noise PCB layout
  • High-accuracy ADC integration
  • Temperature compensation algorithms
PCBA Device

PCBA Device

Custom PCB assemblies for industrial and consumer applications.

  • From prototype to mass production
  • Multi-layer board support
  • Conformal coating available
Smart Control Module

Smart Control Module

Microcontroller-based control units for automation systems.

  • Firmware programming & testing
  • EMI/EMC compliant design
  • Robust thermal management
Power Supply Unit

Power Supply Unit

Switching and linear power supplies with high efficiency.

  • Isolated design with safety certification
  • High current handling capability
  • Thermal stress testing
High-Density PCB

High-Density PCB

Advanced HDI and rigid-flex PCBs for compact electronics.

  • Micro-via and blind/buried via technology
  • Impedance-controlled routing
  • High layer count support
IoT Sensor Node

IoT Sensor Node

Wireless sensor modules with low-power design.

  • Bluetooth/Wi-Fi/LoRa integration
  • Battery life optimization
  • Environmental sealing options
Industrial HMI

Industrial HMI

Human-machine interface panels with touch and display.

  • Resistive/capacitive touch integration
  • High-brightness display drivers
  • Industrial temperature range

Why Choose SEIC?

Over two decades of excellence in electronic manufacturing with a focus on quality, speed, and reliability.

On Time Delivery

Reliable scheduling and logistics to meet your deadlines consistently.

Quality Assurance

ISO9001, ISO14001, OHSAS18001 certified with 99.5% pass rate.

Professional Team

100+ engineers and 500+ skilled employees ensuring technical excellence.

Quick Response

24-hour pre-sales and after-sales technical support service.

12,000+
m² Plant Area
500+
Employees
100+
Engineers
99.5%
Delivery Pass Rate

About SEIC

Shenzhen Shinelong Electronic Industry Co., Ltd. was established on January 10, 1997, with a registered capital of 8 million RMB. Located in Shenzhen, China, we operate from a 12,000 m² facility equipped with advanced automated production lines.

Our main products include PCB ASS'Y components for variable frequency refrigeration systems, electronic weighing products, and OEM processing services for various electronic products. We utilize Japan's advanced "6S" management system and have implemented ERP for full enterprise informatization.

With ISO9001, ISO14001, and OHSAS18001 certifications, we maintain rigorous process control and product quality assurance. Our clean, air-conditioned environment supports high-reliability manufacturing for global clients.

Learn More
Factory View Production Line SMT Line Testing Line

Frequently Asked Questions

What types of PCBs can you manufacture?

We support single-sided, double-sided, and multilayer PCBs up to 20 layers, including HDI and rigid-flex boards.

What is your minimum order quantity?

We accept prototype, small batch, and mass production orders. MOQ depends on complexity but we support as low as 1 unit for prototypes.

What file formats do you accept for PCB design?

We accept Gerber files (RS-274X), IPC-2581, ODB++, and native PCB design files from Altium, KiCad, Eagle, and others.

How do you ensure quality control?

We use online SPI, AOI, X-ray inspection, functional testing (FCT), and in-circuit testing (ICT) to ensure 99.5% delivery pass rate.

Do you offer component sourcing?

Yes, we provide full turnkey, partial turnkey, and consignment manufacturing options with global supply chain support.

Get in Touch

Have a project in mind? Contact us for a fast quotation and technical consultation.

+86-0755-86000938
chen@seic.com.cn
Visit Official Website
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