Aerospace PCB assembly soldering quality inspection showing zero voids in solder joints under High-magnification microscope
High magnification microscope inspection of no-voids soldering on PCB assembly
Aerospace PCB assembly soldering quality inspection showing zero voids in solder joints under High-magnification microscope
High magnification microscope inspection of no-voids soldering on PCB assembly

Aerospace PCB Assembly

Core Advantages

Fab & Assembly Standard

IPC-A-610 Class 3

Inspection Coverage

100% AOI, SPI, X-Ray

Quality System

ISO 9001, AS9100D

Cleanliness

Ionic contamination <1.5 µg/cm² NaCl eq.

Consulting

+86 755 2828 2776

Business Hours (Mon.-Sat.)

9:00 - 18:00

Key Specifications & Technical Parameters

Aerospace PCB assembly demands zero-defect quality, extreme environmental resilience, and full traceability. Our 20L (20-layer) PCB manufacturing capability enables dense routing, multiple power domains, and controlled impedance for high-speed interfaces. As an electronics manufacturing services provider, we meet these requirements through controlled processes, rigorous inspections, and certified materials.

Basic Features

PCB Layer Count

20L

Material Types

FR4-Tg180

Surface Finish

ENIG (Immersion Gold)

Conformal Coating

AR, SR, Parylene – MIL-I-46058C / IPC-CC-830

Typical Value

Component Types

BGA (0.4mm pitch), QFN, CSP, Passive 01005

Solder Voiding

<5% per BGA ball (3D X-ray verified

Ionic Cleanliness

≤1.5 µg/cm² NaCl eq. (IPC-TM-650 2.3.28)

Thermal Cycling

-55°C to +125°C, 1000 cycles

Selection Reference

Design Challenges

High layer count, high-speed signal integrity, thermal management, outgassing

Smallest Saleable Unit

10 pieces (prototype) to 10,000+ pieces (production)

Performance Level

Mission-critical, zero-failure tolerance

Critical Value

20L PCB Thickness

2.4 mm ±10% (typical)

Minimum Trace/Space

4 mil / 4 mil (0.1 mm)

BGA Placement Accuracy

±0.05 mm

Conformal Coating Thickness

25–75 µm (per MIL-I-46058C)

Reference list

Lead Time (Prototype)

12–18 business days (20L

5–7 weeks

Yes

Component Pull Test

√ for BGA、QFN

Quality Specification

ISO 9001:2015, AS9100D (upon request)

Full compliance

Traceability

Component-level lot traceability, solder paste batch ID

Cleanliness Standard

IPC-6012EC, NASA-STD-8739.1

Quality Assurance

For aerospace and defense applications, every 20L PCB assembly must withstand launch vibration, thermal vacuum, and decades of service. Our electronics manufacturing services for aerospace include:

  • 100% X-ray inspection for BGA, QFN, and LGA components
  • Ionic contamination testing (Omega meter / Ion chromatography)
  • Conformal coating uniformity check (UV light and thickness gauge)
  • Burn-in and thermal cycling (optional, per customer specification)
  • Complete documentation package (certificates, inspection reports, traceability logs)

AOI

X-ray

IPC Class 3

100% functional testing

AOI
0 %
Functional testing
0 %
X-ay
0 Phases
Lead time for prototype
0 H

Product Details

Discover our high-reliability 20L PCB assembly process for aerospace – from zero-void soldering to zero-flux-residue cleaning and conformal coating.

Product Overview

Aerospace electronics demand the highest level of manufacturing quality. Our 20L aerospace PCB assembly service is designed for mission-critical systems where failure is not an option. We combine:

Core Advantages

Technical Features

Our 20L aerospace PCB fabrication and assembly workflow follows strict process controls, from incoming material to final packaging.

1
20L PCB Fabrication (partner facility)

Multi-layer lamination, impedance test coupons

2
Material Inspection & Kitting

Verify date codes, MSL level, ESD protection

3
Solder Paste Printing

Laser-cut stencil, SPI (3D volume measurement)

4
Precision Placement

High-speed pick-and-place with component verification

5
Vacuum Reflow Soldering

Nitrogen atmosphere, void control <5%

6
AOI & 3D X-Ray Inspection

BGA void detection, solder joint quality

7
Zero-Flux Cleaning

Deionized water spray, conductivity monitoring

8
Conformal Coating

Selective spray, UV curing, thickness verification

9
Electrical & Functional Test

ICT, flying probe, boundary scan, burn-in

8
Final Inspection & Packaging

ESD vacuum sealing, vacuum bags or ESD trays

Leveraging our electronics manufacturing services expertise, we deliver aerospace-grade 20L PCB assembly with proven reliability.

20-Layer PCB Capability

A 20-layer PCB provides dedicated signal, power, and ground planes – essential for high-speed digital, RF, and mixed-signal aerospace designs. We support:

  • Controlled impedance (50Ω, 90Ω, 100Ω) with ±10% tolerance
  • Blind and buried vias for high-density routing
  • Backdrill for high-speed signal integrity
  • Material options – Polyimide (low outgassing), FR4 high-Tg

Zero-Void Soldering (Vacuum Reflow)

Standard reflow can leave voids up to 25%. Our vacuum reflow process reduces voids to <5% – critical for thermal dissipation and mechanical strength in high-power aerospace electronics.

Process: Solder reflow in a vacuum chamber (20–30 kPa) removes trapped gases during solidification.

Zero-Flux-Residue Cleaning

Residual flux can cause electrochemical migration in humid environments. Our closed-loop deionized water spray system achieves ionic cleanliness ≤1.5 µg/cm² NaCl equivalent – meeting IPC-6012EC and NASA standards.

Verification: Real-time conductivity monitoring + periodic ion chromatography.

Application Areas

Our 20L aerospace PCB fabrication and assembly serves mission-critical systems across the aerospace and defense industry.

Avionics & Flight Control

  • Flight management computers (FMC) – High-reliability processing with 20-layer backplane
  • Actuator control electronics – Motor drive and feedback
  • Cockpit displays – Video processing, graphics rendering

Computers

Actuator control

Cockpit displays

Satellite & Space Systems

  • On-board computers (OBC) – Command and data handling on 20L boards
  • Power distribution units (PDU) – High-current switching, multiple power planes
  • Telemetry tracking & command (TT&C) – RF communication

Computers

Power distribution

RF communication

Radar & Electronic Warfare

  • Active electronically scanned array (AESA) – Beamforming control with dense 20L routing
  • Signal processing modules – High-speed digitization
  • Electronic countermeasures (ECM) – Jamming and deception

Radar/LiDAR

ECM

BMS

Missile & Munitions Guidance

  • Inertial navigation systems (INS) – Sensor fusion, Kalman filtering
  • Seeker electronics – Imaging infrared (IIR), radar seeker
  • Flight termination systems (FTS) – Safety and command

Power

Railway

Oil & gas

Unmanned Aerial Systems (UAS)

  • Autopilot flight controllers – PX4/ArduPilot ready
  • Payload interface boards – Gimbal control, video downlink
  • Ground control stations – Telemetry and command

Controllers

Gimbal control

Control stations

Launch Vehicle & Propulsion Systems

  • Stage avionics controllers – Real-time telemetry and command distribution
  • Thrust vector control (TVC) electronics – High-current actuator drivers with redundant feedback
  • Engine health monitoring systems – Vibration, temperature, and pressure sensor acquisition

Avionics controllers

Monitoring systems

TVC

Project Story

A European space prime contractor required a 20L aerospace PCB fabrication, components sourcing, and SMT assembly for a next-generation satellite on-board computer. The board featured a Xilinx Kintex UltraScale FPGA, 20-layer polyimide PCB with blind vias, and 400+ BGA components. 

All 50 engineering units passed thermal cycling (-55°C to +125°C) and vibration testing. Full traceability documentation was provided.

IPC-A-610 Class
0
Minimum BGA pitch
0 mm
Zero failures across
0 +

IPC class 3 assembly circuit board

For an aerospace project

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