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WellPCB · Shenzhen SMT / PCBA Factory
CAPABILITY DECK · 01 / 15
TURNKEY PCB ASSEMBLY · SHENZHEN · CHINA

Inside our
Shenzhen SMT factory

A high-reliability PCBA line built for automotive, medical and industrial electronics — from prototype to volume, every assembly step in-house.
11 SMT LINES · 26 PLACEMENT MACHINES · 3D SPI & AOI · MES TRACEABILITY
→ swipe / arrow keys
WellPCB Shenzhen SMT cleanroom floor
The Factory · At a Glance
02 / 15
Under one roof.
Full PCBA scope.
Solder printing, high-speed placement, nitrogen reflow, wave soldering, full 3D inspection and functional test — every step runs under one roof, on one MES backbone — 9,600 m² across four floors, a team of 150, up to 20 million placements a day.
Placement Machines
26

Across 11 SMT lines, in parallel

Reflow Ovens
6

4 nitrogen-atmosphere

3D Optical Inspection
100%

Full 3D SPI & AOI coverage on SMT boards · X-Ray available

Positioning · 03
WHY WELLPCB

Not just
placement.
Reliability, proven.

Two-thirds of our reflow capacity is nitrogen. All optical inspection is 3D. Every board carries a unique barcode from first paste to final test.

That is the configuration behind automotive, medical and other high-reliability PCBA — and it is our baseline, not an upgrade.

Factory Tour · Route · 04
04 / 15
What You'll See Today

From incoming materials to final test

01Material ControlIncoming check, count, storage
02SMT ProductionPrint · place · reflow
03Inspection & TestSPI · AOI · X-Ray · ICT/FCT
04Cleaning & AssemblyTHT assembly · wave solder · ion-water clean
05Packing & TraceabilityFinal QC · MES record
Watch For · 01

Material verification & FIFO

Barcode-scanned reels, anti-error feeding, and first-in-first-out storage — before a single part is placed.

Watch For · 02

Nitrogen reflow & 3D inspection

4 nitrogen ovens, 9× 3D SPI, 5× 3D AOI and X-Ray — the reliability core of the line.

Watch For · 03

Board-level MES traceability

See how one board barcode links its material, machine, operator, time and inspection data.

Equipment Inventory · 05
05 / 15
Line Configuration

What is on the floor

11Solder printers
26Pick & place machines
4 / 6Nitrogen reflow ovens
2Wave solder machines
93D SPI (paste inspection)
53D AOI (optical)
1X-Ray system
ICT + FCTIn-circuit & functional test
Plus ion-water cleaning, aging chambers, MES and smart material storage — the full high-reliability chain.
26
PLACEMENT MACHINES · 11 SMT LINES
SMT Line · In Motion · 06
06 / 15
High-speed
placement, live
Each line starts with precision solder-paste printing, then high-speed, high-accuracy placement, and finishes through a temperature-profiled reflow oven.
Placement
26 machines

Parallel machines, high speed

Smallest Component
01005

imperial ~0.4 × 0.2 mm · BGA/µBGA/QFN supported

Reflow
Profiled

Zone-controlled thermal curve

Highlight · Nitrogen Reflow · 07
07 / 15
Highlight 01 · Soldering Quality

Nitrogen vs. air reflow

Standard Air Oven
  • Dull, yellow-grey joints
  • Higher defect rate — bridging, solder balls
  • Pillow effect on BGA more common
  • Narrow, temperature-sensitive process window
Nitrogen Oven · 4 units · O₂ 500–2,500 ppm
  • Improved wetting, reduced oxidation
  • Fewer oxidation-related defects
  • Lower risk of oxidation-related defects
  • Wide window, stable in volume
Why it matters — nitrogen reflow helps improve solderability and process stability for automotive, medical, industrial and new-energy assemblies.
Soldering & Cleaning · 08
08 / 15
Beyond Placement

Critical
processes beyond
placement

Wave solder machine

Wave soldering · 2 machines

Mass soldering of through-hole components for mixed-technology boards.

Ion-water cleaning machine

Ion-water cleaning

Microscope-verified cleanliness (60–80×) against our acceptance standard — for assemblies with stringent cleanliness requirements.

Highlight · 3D SPI & AOI · 09
09 / 15
Highlight 02 · Multi-Stage Screening

Caught before it ships

3D SPISolder-paste volume, height and offset — before reflow
3D AOIComponent and solder-joint inspection · 3D profiling reduces false calls
X-RayBGA / QFN hidden-joint verification
ICT / FCTElectrical and functional test
MES lockInspection data feeds MES; anomalies auto-stop and lock boards
Placement coplanarity measured to ±0.03 mm per lead (on-line measurement)
3D AOI inspection result
3D SPI & AOIApplicable SMT assemblies, imaged in 3D
Smart Manufacturing · 10
10 / 15
MES · The Production Brain

Every board, fully traceable

Full traceability

Unique barcode per board — material lot, machine, operator, time.

Anti-error feeding

Reel barcodes verified against the program — wrong part halts the line.

Live quality lock

SPI / AOI / X-Ray data feed MES; anomalies auto-stop and lock boards.

Smart storage · FIFO

Automated racks with first-in-first-out control, synced to MES.

Smart material storage racks
MES · live boardReal-time shop-floor visibility
In-house Tooling & Fit · 11
11 / 15
Self-built Tooling · Where We Fit

Built in-house, fit for hard jobs

SMT stencils
StencilsIn-house SMT stencils
Test fixtures
FixturesTest jigs / probe stations
Wave-solder and crimp fixture storage racks
FixturesWave-solder / crimp fixtures
Built for high-reliability sectors
Automotive ·  Medical ·  Industrial ·  IoT
Capabilities & Limits · 12
12 / 15
What We Can Build

Capabilities & limits

±25 µm
Placement accuracy
0.25 mm
Min lead pitch
01005
Smallest component · imperial ~0.4×0.2mm
No MOQ
From one-off prototypes to volume
0.15 mm
Min QFN pin width (0.25 space)
0.2 mm
Min BGA ball dia (0.35 space)
SMT · THT · mixed
Assembly types
2007
Manufacturing since · 3,000+ clients
10 dedicated 4 mm micro-feeders enable stable 01005 feeding — not common on standard SMT lines. Lead time & pricing quoted per project after DFM. SPI-VERIFIED · PROTO → VOLUME
High-Density Assembly · 13
13 / 15
Highlight 03 · Miniaturization

01005 & PoP, in production

01005 · stable mass production

Imperial 01005 (~0.4 × 0.2 mm) placed daily on YAMAHA YSM20R-2 / YSM10 machines.

10× YAMAHA 4 mm micro-feeders

Original ZSR feeders for 4 mm tape — reliable 01005 feeding, not common on standard lines.

PoP · package-on-package

Solder-paste dipping process, warpage control and X-Ray verification — in stable production.

AI-assisted 3D AOI

Sinic-Tek A510D with AI inspection, linked live to MES.

01005 vs 0201 under the microscope
Microscope01005 vs 0201, on screen
01005 placed on a production board
On board01005 placed & soldered
X-Ray verification of hidden joints
X-RayHidden-joint verification
YAMAHA 4mm ZSR feeder label
FeedersYAMAHA ZSR 4 mm · ×10
All photos taken on our Shenzhen line, July 2026 — microscope, X-Ray and feeder shots from production boards, not stock imagery.
Certifications & Standards · 14
14 / 15
Audited & Certified

Certified to the standards
your industry requires

IATF 16949 certificate scan
IATF 16949
VALID TO 2029-02
Automotive quality
ISO 9001 certificate scan
ISO 9001
VALID TO 2029-06
Quality management
ISO 13485 certificate scan
ISO 13485
VALID TO 2029-06
Medical devices
ISO 14001 certificate scan
ISO 14001
VALID TO 2028-08
Environmental
Builds to IPC-A-610 Class 3 acceptance · RoHS-compliant on request · full certificates (certified entity, scope and number) available for review. ALL CERTS CURRENT
15 / 15
CLOSING
START YOUR PROJECT REVIEW

Prototype to
volume, proven.

Send your Gerber/ODB++, BOM, CPL & test needs · ① Upload files ② DFM & BOM review ③ Quotation & lead-time ④ Prototype & approval.
WellPCB · Shenzhen
SMT / PCBA
WHAT YOU SAW TODAY
03 REASONS
01

High-reliability by default

Nitrogen reflow, 100% 3D SPI & AOI inspection and cleaning as the baseline.

02

One roof, one MES

Print to functional test in-house, fully traceable, anti-error controlled.

03

Prototype to volume

26 placement machines across 11 SMT lines scale with you — from first sample to mass production.

→ www.wellpcb.com · [email protected]