Quality inspection of the entire process of Excellence Type-C connectors

As a USB-IF certified Type-C connector manufacturer, we implement a five-layer quality assurance system covering the entire product lifecycle. Through the integration of automated detection and manual quality control, we ensure military-grade reliability (MIL-STD-810G compliance) with a defective rate below 0.02‰.

1. Automated Electrical Testing System (ATE)

Equipment: Proprietary 6-axis high-speed test platform
Precision: ±0.01μΩ (contact resistance) / ±0.1pF (capacitance)
Key Parameters:

• Contact Resistance: ≤20mΩ (Vconn) / ≤30mΩ (CC)

• Insulation Resistance: ≥100MΩ@500VDC

• Signal Integrity: Eye diagram compliance with USB3.2 Gen2

Testing Protocol:

1. Multi-dimensional Contact Test: 128-pin matrix probe simultaneously verifies 24 terminal groups

2. Dynamic Impedance Analysis: Real-time voltage drop monitoring under 0.5-3A loads

3. High-Frequency Validation: TDR measurement for impedance continuity (90Ω±7%)

4. AI Decision System: Machine learning compares 5,000+ characteristic waveforms

Advantages:

• Throughput: 3,500pcs/hour

• Data Traceability: Encrypted quality records linked to unique product IDs

• Self-Calibration: Probe impedance adjustment every 2 hours (±1% accuracy)

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2. Manual Sampling Inspection (AQL 1.0)

2.1 Optical Dimensional Inspection

Equipment: OLYMPUS STM7 measuring microscope + Mitutoyo CMM
Standards:

• Terminal Coplanarity: ≤0.05mm (EIA-364-21C compliant)

• Plastic Tongue Height: 3.25±0.03mm

• Pad Pitch: 0.4mm±0.02mm

Procedure:

• 50pcs/batch sampled for 22-dimension inspection

• SPC control charts maintain CPK≥1.67

2.2 Mating Durability Test

Equipment: Schunk automated cycling tester
Parameters:

• Speed: 30 cycles/minute

• Stroke: 12mm±0.1mm

• Cycles: 10,000 (exceeding USB-IF requirements by 20%)

Evaluation Criteria:

• Retention Force: ≥85% initial value

• ΔContact Resistance: ≤10%

• Zero visible wear on plastic tongue

2.3 Salt Spray Corrosion Testing

Conditions:

• Solution: 5% NaCl

• Chamber Temp: 35±2℃

• Duration: 48hr continuous spray

Acceptance Standards:

• Terminals: No red rust (ASTM B117 Class 9)

• Housing: No cracking/swelling

• Post-test Insulation Resistance: ≥50MΩ

3. Manual Taping & Final Inspection

Process Flow:

1. Visual Inspection: 12-defect check under 2000Lux ring light

2. Functional Retest: Handheld tester verifies 5V/3A power delivery

3. ESD Packaging: Vacuum sealing in Class 1000 cleanroom

4. Traceability Integration: Unique QR code per reel (batch/data logging)

Quality Controls:

• Tape Pitch Accuracy: ±0.1mm

• Reel Tension: 15±2N

• Moisture Prevention: Built-in humidity indicator (RH≤10%)

4. Pre-Shipment Verification