KKPCB Quality Control – Reliable PCB & PCBA Inspection - KKPCB
 

Total Quality Management (TQM)Quality ControlKKPCB

Guided by ISO9001, IPC-A-610E standards, and SPC control methods, KKPCB continuously enhances its quality management system and manufacturing capabilities. We maintain strict controls throughout PCB design, DFM checks, new product introduction, PCBA production, supply chain management, testing, and staff training, ensuring stable processes, consistent performance, and high-quality PCB and PCBA solutions. Our rigorous approach guarantees reliability, durability, and complete customer satisfaction on every project.

Final Quality Control (FQC)

KKPCB is your trusted partner for PCB manufacturing and assembly. Beyond providing friendly service and on-time delivery, we are committed to producing high-quality PCBs and PCBA solutions that consistently meet or exceed customer expectations.

https://www.kkpcba.com/wp-content/uploads/2024/07/8.png

Lorem ipsum dolor sit amet, consectetur adipiscing elit. Ut elit tellus, luctus nec ullamcorper mattis, pulvinar dapibus leo.

Manufacturing Standards

Our experienced technicians follow strict industry standards and high-quality requirements to ensure every PCB and PCBA meets exceptional performance and reliability.

Quality Control Process

At KKPCB, we believe that a comprehensive quality control process is the key to consistently delivering reliable and high-quality PCBs and PCBA products.

Quality Reports & Certifications

KKPCB provides comprehensive quality reports and industry-standard certifications, demonstrating the reliability and high quality of our PCB and PCBA products.

Raw Material Download

Download detailed specifications of the raw materials used in our PCB and PCBA production to ensure transparency and quality compliance.

Manufacturing Standards

Our skilled technicians adhere to strict industry standards, ensuring every PCB and PCBA is manufactured with exceptional quality, reliability, and consistency.

PCB Standards

PCB Production standards follow IPC Class 2,IPC Class 3, ,Automotive Standard, Customer Standard
Item Advanced PCB Standard PCB
Engineering One file/1 day + Senior Engineer Mid-level Engineer (1 file/hour)
Material Shengyi, Rogers, Arlon, Isola, Omega, Nelco, 3M, etc. Compliant with Class B/L IPC4101 KB (Kingboard) / GDM (Goldenmax) Compliant with Class B/L IPC4101
Inks & Solder Mask Rohm&Haas, TAIYO, Kuangshun, Compliant with Class T IPC-SM-840 TAIYO, Kuangshun, Compliant with Class T IPC-SM-840
Drilling Min. mechanical hole size 0.15 mm, laser hole 0.1 mm Min. mechanical hole size 0.2 mm
Plating PTH (copper thickness in hole ≥20 μm), IPC 3 (25 μm) PTH (copper thickness in hole ≥18 μm)
Solder Mask Offset ±2 mil ±3 mil
Dimensional Tolerance ±0.13 mm ±0.2 mm
Warp Angle 0.75% 1%
Testing Method A.O.I, 4-wire Kelvin measurement, microsection, solderability test, impedance test... A.O.I., flying probe testing, fixture testing
Glass Transition Temperature ℃ >140℃ >130℃
Trace Etching Repairing traces is prohibited (IPC 3, Automotive standard, Customer standard)
Cleanliness Higher cleanliness requirements than IPC Higher cleanliness requirements than IPC
https://www.kkpcba.com/wp-content/uploads/2024/07/1-18.jpg
https://www.kkpcba.com/wp-content/uploads/2024/07/2.png
https://www.kkpcba.com/wp-content/uploads/2024/07/7-3-1.jpg
https://www.kkpcba.com/wp-content/uploads/2024/07/3-11.jpg
https://www.kkpcba.com/wp-content/uploads/2024/07/4.png
https://www.kkpcba.com/wp-content/uploads/2024/07/5.png
https://www.kkpcba.com/wp-content/uploads/2024/07/6-1-2.jpg

PCB Assembly Processing Capability

KKPCB offers comprehensive PCB assembly services with advanced equipment and skilled technicians to ensure high-quality results. We are capable of handling SMD, DIP, BGA, Micro-BGA, QFN, and other leadless package components, supporting both prototype and mass production. Our precise assembly processes guarantee excellent placement accuracy, reliable soldering, and consistent performance across all products.
Parameters Capabilities for Bulk Orders Capabilities for Trial Orders
Board Size L50×W50mm ~ L510×W460mm No restrictions
Board Thickness T=0.4~4.0mm No restrictions
Min. SMD Size 01005 (inch) 01005 (inch)
Max. SMD Size 45×45mm (connector length: 150mm) No restrictions
Min. IC Pin Pitch 0.3mm 0.3mm
Min. BGA Ball Pitch 0.4mm 0.4mm
Equipment Placement Accuracy ±0.35mm @3σ ±0.35mm @3σ
SMD Production Capacity 1,000K points/day 200 orders/day
DIP Production Capacity 500K points/day 200 orders/day

// Perfect quality systemQuality Control Process

The perfect quality assurance system and various testing equipment help us monitor the entire production process to ensure the stability of the process and product quality. At the same time, we also introduce advanced instruments and technical methods to achieve continuous improvement.

PCB Quality Control Process

At KKPCB, quality is not just a standard—it’s our commitment. Our comprehensive PCB Quality Control Process ensures that every PCB and assembled board meets the highest industry standards for precision, durability, and reliability. By integrating advanced inspection technologies, rigorous testing protocols, and strict compliance measures, we guarantee zero-defect production and unmatched performance across all industries, including automotive, medical, aerospace, industrial, and consumer electronics.
Copper plating

Copper plating

Electroplating

Electroplating

Fully automatic electroplating line

Fully automatic electroplating line

Silkscreen laser printer

Silkscreen laser printer

Automatic dry film coating machine

Automatic dry film coating machine

FPC cover film

FPC cover film

Lamination machine

Lamination machine

Driling machine

Driling machine

Copper plating

Copper plating

Our PCB Quality Control Process Includes:

1. Raw Material Inspection
  • Verifying PCB laminates, copper foils, and solder masks for thickness, dielectric properties, and surface integrity.
  • Ensuring compliance with RoHS, REACH, and UL safety and environmental regulations.
2. Inner Layer & Outer Layer Inspection
  • Performing Automated Optical Inspection (AOI) to detect alignment errors, etching defects, and surface contamination.
  • Verifying copper thickness uniformity and ensuring high-precision trace formation.
3. Drilling & Plating Quality Control
  • Using X-ray drilling alignment verification to ensure accurate via placement.
  • Conducting plating thickness measurements to meet conductivity and durability requirements.
4. Solder Mask & Silkscreen Inspection
  • Checking for uniform coverage, adhesion strength, and proper curing to prevent delamination.
  • Ensuring accurate legend printing for component identification.
5. Electrical Testing
  • Conducting Flying Probe & Bed-of-Nails Testing to detect shorts, open circuits, and resistance variations.
  • Ensuring signal integrity and impedance control for high-speed PCB applications.
6. Final Quality Assurance
  • Performing thermal shock, humidity resistance, and mechanical stress tests for enhanced reliability.
  • Ensuring every PCB meets IPC-A-600 Class 2 & Class 3 quality standards.

At KKPCB, we are committed to zero-defect PCB manufacturing, delivering high-performance, high-reliability circuit boards for applications in automotive, aerospace, medical, and industrial electronics.

Trust KKPCB for Industry-Leading PCB Quality & Precision!

PCB Assembly Quality Control Process

At KKPCB, we implement a strict, multi-step PCB assembly quality control process to guarantee that every assembled PCB meets the highest industry standards for precision, durability, and functionality. By utilizing advanced inspection technologies, rigorous testing protocols, and certified quality management systems, we ensure zero-defect production and long-term reliability for industries such as automotive, aerospace, medical, industrial, and consumer electronics.

KKPCB has dozens of SMT production lines. Advanced production equipment, strict quality control and intelligent service system to ensure the standardization and best quality of each production process.

Smart management system & Advanced production and testing equipment:

https://www.kkpcba.com/wp-content/uploads/2024/07/Depaneling-Machine.jpg

Depaneling Machine

https://www.kkpcba.com/wp-content/uploads/2024/07/Microplate-Washer.jpg

Microboard Cleaning Machine

https://www.kkpcba.com/wp-content/uploads/2024/07/Wave-Soldering.jpg

Wave Soldering

https://www.kkpcba.com/wp-content/uploads/2024/07/AOI.jpg

AOI

https://www.kkpcba.com/wp-content/uploads/2024/08/Smart-Warehousing.jpg

Smart Warehousing

https://www.kkpcba.com/wp-content/uploads/2024/08/On-line-AOl.jpg

Online AOI

https://www.kkpcba.com/wp-content/uploads/2024/08/Conformal-Coating-Equipment.jpg

Conformal Coating Equipment

https://www.kkpcba.com/wp-content/uploads/2024/08/Barcodes-vs-Qr-Codes-for-InventoryManagement.jpg

Barcodes & QR Codes for Inventory Management

https://www.kkpcba.com/wp-content/uploads/2024/08/AOl-Machine-Before-the-Furnace.jpg

Pre-Reflow AOI Machine

https://www.kkpcba.com/wp-content/uploads/2024/08/X-Ray.jpg

X-Ray Inspection

https://www.kkpcba.com/wp-content/uploads/2024/08/Wave-Soldering.jpg

Wave Soldering

https://www.kkpcba.com/wp-content/uploads/2024/08/SPI.jpg

SPI (Solder Paste Inspection)

https://www.kkpcba.com/wp-content/uploads/2024/08/SPI-Solder-Paste.jpg

Solder Paste SPI

https://www.kkpcba.com/wp-content/uploads/2024/08/SMT-Placement-Machine.jpg

Surface Mount Machine (SMT Machine)

1. Incoming Material Inspection (IQC)
  • Verifying PCB bare boards, components, and solder paste for conformity with specifications (RoHS, REACH, UL, IPC standards).
  • Using X-ray fluorescence (XRF) and material traceability systems to ensure component authenticity and quality.
2. Solder Paste Inspection (SPI)
  • Ensuring precise solder paste volume, thickness, and alignment to prevent defects like bridging and insufficient soldering.
  • Using automated SPI systems to detect inconsistencies before placement.
3. Automated Optical Inspection (AOI) – Pre & Post Reflow
  • Identifying misaligned, missing, or incorrect components during placement.
  • Checking for cold solder joints, insufficient solder, or bridging after reflow soldering.
4. X-ray Inspection (For BGA, QFN, and Hidden Joints)
  • Detecting voids, solder balling, and hidden defects in BGA, QFN, and other leadless packages.
  • Ensuring proper solder joint formation and connectivity.
5. In-Circuit Testing (ICT) & Flying Probe Testing
  • Checking for open circuits, shorts, incorrect component values, and solder joint integrity.
  • Ensuring electrical connectivity and proper signal transmission.
6. Functional Testing (FCT)
  • Simulating real-world operating conditions to verify board functionality.
  • Testing power-up, microcontroller programming, signal integrity, and load performance.
7. Final Quality Assurance & Reliability Testing
  • Conducting burn-in testing, thermal cycling, humidity resistance, and mechanical stress testing for mission-critical applications.
  • Ensuring compliance with IPC-A-610 Class 2 & Class 3, ISO 9001, IATF 16949, and other industry standards.

Quality checking process and description

https://www.kkpcba.com/wp-content/uploads/2024/07/12-2-1.jpg
01-Process review

Assess and inspect the particularity of the PCBA manufacturing process in advance, guide the production, and improve the quality from the process technology.
https://www.kkpcba.com/wp-content/uploads/2024/07/11-4-1.jpg
02-IQC Incoming Quality Control

● Check whether the resistance and capacitance values are correct
● Check whether the pads on the components and the board are consistent
● Confirm whether the incoming quantity is accurate
● Check whether the components are abnormal
https://www.kkpcba.com/wp-content/uploads/2024/07/13-1-1-1.jpg
03-SPI Solder Paste Inspection

SPI can detect whether the solder paste is sufficient and uniform, which can effectively prevent production quality problems in advance caused by poor solder paste printing.
https://www.kkpcba.com/wp-content/uploads/2024/07/14-1-1-1.jpg
04-Online AOI Inspection

The AOI can detect the wrong solder, reverse solder, false solder, empty solder, incomplete solder, short circuit, offset, tombstone, etc. after reflow soldering. And it can also detect excessive solder, less solder, continuous solder and other undesirable phenomena in the appearance of PCBA solder joints.
https://www.kkpcba.com/wp-content/uploads/2024/07/15-2-1.jpg
05-First sample test

Combined with Gerber, BOM and coordinate files, the resistance and capacitance in the completed PCBA are verified again by the first-sample tester to ensure the correctness of all parameter values.
https://www.kkpcba.com/wp-content/uploads/2024/07/18-2.jpg
06-Off-line AOI inspection

According to the IPC610D standard, inspect the soldered surface mount PCBA for errors, omissions, and false connections.
https://www.kkpcba.com/wp-content/uploads/2024/07/16-1.jpg
07-X-Ray welding inspection

Inspect the solder joints of invisible components to ensure the reliability of each solder ball of the BGA.
https://www.kkpcba.com/wp-content/uploads/2024/07/17-2.jpg
08-QC manual inspection

Refers to the standard IPC–610 inspection standard, and the finished board is visually inspected to ensure 100 % Good products shipped.

// Our Quality CertificationsQuality Certifications

KKPCB quality management system is to ensure with efficient printed circuit boards which meet customer’s requirements. Our partners manufacture in compliance with, among others, the following standards:
IATF 16949:2016
ISO 13485:2016
IS0 14001:2015
ISO 9001:2015
ROHS
IATF 16949:2016
UL
CE

Thanks to the materials used and advanced technology, we always ensure highest quality of our printed circuit boards!
KKPCB can provide customers with certifications in various markets, such as: EU RoHS certification, EU CE certification, US UL certification, US FCC certification, Australia SAA certification, Australia C-tick certification, Australia RCM certification, Japan PSE certification, Brazil INMETRO certification, Mexico NOM certification, Canadian IC certification, Korea lithium battery KC certification, Argentina IRAM S-mark certification, DLC certification, GS certification, CB certification, etc.

https://www.kkpcba.com/wp-content/uploads/2024/07/cap-flag.png