PCB Assembly

Our PCB Assembly (PCBA) Process

Puruidy utilizes dedicated SMT production lines and advanced equipment to provide high-quality, small-to-medium volume manufacturing services for custom PCB products.

01. IQC Incoming Quality Control

Puruidy thoroughly inspects all incoming materials and resolves quality issues prior to SMT assembly.
- Verifying resistance and capacitance values.
- Checking component and board pad consistency.
- Confirming incoming material quantities.
- Inspecting for component abnormalities.

02. Solder Paste Printing

This is a key step in the SMT PCBA process. Using a stencil printer—the most common method—solder paste is accurately applied to the PCB pads, depositing the precise amount and thickness required.

03. Solder Paste Inspection (SPI)

Puruidy utilizes SPI to perform online inspection for defective solder paste printing during assembly. This process directly checks solder paste quality on the PCB, effectively reducing the defect rate and saving significant time and cost.

04. SMD Component Placement

This is the PCBA process where surface-mount components are accurately placed onto the designated pads of a PCB, establishing the foundational electrical interconnections.

05. Reflow Soldering

In this process, components are initially held in place by solder paste. The assembled PCB then passes through a precisely controlled heating cycle in a reflow oven, melting the solder to form permanent, reliable electrical and mechanical bonds.

06. Automated Optical Inspection (AOI)

Puruidy employs AOI to perform comprehensive post-reflow soldering inspection. It accurately detects a range of defects—including misalignment, insufficient solder, bridging, and missing components—ensuring the highest quality and reliability of every PCBA.

07. Through-Hole Component Soldering

This critical step completes the assembly of through-hole components. Puruidy offers two precise methods: flexible manual soldering for prototypes and small batches, and high-efficiency wave soldering for mass production, ensuring reliability for every design.

08. First Sample Test

Puruidy performs a final verification on completed assemblies. Using the design files (Gerber, BOM, and coordinates), a first-article tester validates the resistance and capacitance values to ensure all parameters are correct.

09. X-Ray Inspection

V employs X-ray inspection to verify the quality of hidden solder joints, particularly for components like QFN and BGA packages. This non-destructive process ensures the reliability of every individual solder ball, guaranteeing the integrity of the final assembly.

10. Final Inspection and Functional Test

In the final stage, Puruidy conducts functional testing to verify the assembled PCB performs as expected. Depending on the application, specialized tests—such as drop tests for automotive or halogen tests for medical devices—are also performed.

Our PCB Assembly (PCBA) Process

Puruidy utilizes dedicated SMT production lines and advanced equipment to provide high-quality, small-to-medium volume manufacturing services for custom PCB products.

PCB Fabrication

Puruidy provides a One-Stop Solution for PCB & Prototype Assembly, specializing in prototype and small-batch production. We deliver high-tech, cost-effective multilayer PCBs with up to 14 layers, including specialized boards such as Impedance Control PCBs, and PCBs with Buried & Blind Vias.

PCBs with up to 14 layers
Min hole size:0.2mm
Laser Direct Imaging (LDI)
Half-cut/Castellated Holes
Blind,Buried and Plugged Vias
Via in pad
Z-axis milling

100% Electrical Testing
High Density Interconnect PCBs
Special colors & -lacquers
Edge Plating
Custom Stackup
Via filled with resin

Min track/spacing 0.1mm/4mil
High-Temp,FR4,Flex,HDI,Rogers,etc
Lead-Free compliant PCBs
Impedance control
Carbon ink
Countersink/Counterbore

PCB Assembly

Puruidy provides turnkey PCB assembly services, from prototype to low and medium-volume production runs. We manage the entire process for you, including component procurement, manufacturing, assembly, testing, and final delivery. Our capabilities extend to assembling advanced components such as BGA, Micro-BGA, and QFN packages.

PCB Assembly Process
Through-Hole Assembly
Special Reminders
BGA X-Ray Inspection

SMT Assembly Capabilities
Mixed Assembly Advantages
File Requirements
Automated Optical Inspection

BGA Assembly Capabilities
PCB Assembly Capability

Parts Management & Component Sourcing

Puruidy provides comprehensive component sourcing to support our assembly services. Our extensive industry experience has enabled us to build strong partnerships with authorized distributors such as Digi-Key, Mouser, Arrow, and Avnet, ensuring reliable access to your required components at competitive prices.

Kitted and Turn-Key PCB Assembly
Part Crosses and Substitutions
Modules IC Programming
Lowest Surcharge Rate

Component Inventory Management
Unique Global IC Sources
Electrical Characteristic Analysis

Sourcing Rare Component
Parts Incoming Check
Quick BOM Pricing in 24 hours

Functional Testing and Other Testing

Puruidy provides comprehensive PCB assembly testing services, including In-Circuit Testing (ICT), Functional Testing (FCT), Aging Testing, and environmental tests such as Temperature & Humidity and Drop Testing. We execute tests per customer plans and deliver summarized data reports.

Advanced Testing Equipment:

Our lab is equipped with environmental chambers (high/low temperature, salt spray, dust, UV), mechanical testers (drop, shock, vibration, button durability), and precision analyzers (RDS signal generators, high-frequency oscilloscopes, audio analyzers) to ensure product reliability.

Industrial Monitoring & Visual Management:

Our real-time monitoring system tracks the entire SMT production line via 2D/3D visualization. It displays key equipment data—such as placement machine pickup counts, SPI pass rates, and AOI defect detection—enabling immediate process verification and control. Line yield is tracked hourly; if it falls below target, alerts prompt management intervention. By integrating IoT, big data, and automation, we create a closed-loop, self-optimizing production environment where any non-standard operation triggers an immediate alarm.

Visual Inspection after SMD Process
Functional Testing (FCT)
Digital Multimeters
Adjustable DC Power Supply
LRC Multi-meter
Temperature and Humidity Testing

AOI Testing
Embedded System Testing
Input/Output PCBs
Digital Oscilloscope
Universal Programmer

X-ray Testing for BGA Package
Testing Software
Communication Ports
Signal Generator
High and LOW Temperature Testing

Other Testing and Customized Services:

In-Circuit Testing (ICT)
Drop Testing
Potting

IC Programming
High Voltage Testing
Box Build Assembly

Salt Spray Testing
Aging Testing
Package Box

IC Programming

Puruidy provides quick-turn chip programming before assembly. We support a wide range of package types (DIP, SOP, QFP, QFN, BGA, etc.).

We prioritize the security of your Intellectual Property (IP) and are ready to sign an NDA upon request. All programming is managed through our qualified production system.