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Warehouse acceptance standards

Warehouse acceptance standards

 Component Incoming Inspection

Zero-Defect Policy
 Our Commitment to Quality
Every component batch undergoes rigorous incoming inspection before entering production. We maintain zero tolerance for counterfeits and enforce AQL 0.65 for major defects. If a batch fails even one critical criterion, the entire lot is rejected and returned.
AQL 0.65
Major defects limit
100%
X-Ray & C-SAM for high-risk parts
30–100×
Microscope inspection
JTAG ID
Hardware‑fused anti‑counterfeit
Decap
Destructive analysis on suspicion
SCAR / 8D
Supplier corrective action

Inspection Workflow (Fail‑Fast)

1. PO & Label→2. MSL / HIC→3. Visual (30–100x)→4. X-Ray / C-SAM→5. Electrical Test→6. JTAG (if avail.)→7. Decap (if needed)→8. Disposition

Any failure in steps 1–3 triggers immediate lot rejection without further inspection.

Acceptance Criteria (ANSI/ASQ Z1.4 Level II)

Severity Code Defect Examples AQL Action
Critical CR Wrong part number, counterfeit, refurbished, polarity reversed 0 Single defect → lot rejected
Major MA Oxidized leads, cracks, illegible marking, bent pins, solderability failure 0.65 Exceed → lot rejected
Minor MI Tilted label, minor cosmetic scuffs 1.5 Accept within limit, record
🔍 Bright‑line rule: If major defects exceed 1.2% of sample size (AQL 0.65), the entire batch is rejected and a SCAR issued to supplier.

Our Counterfeit Detection Arsenal

  • High‑magnification microscopy (30–100×): Reveals sanding, re‑marking, ghosting, flux residue, and abnormal surface texture.
  • X‑Ray inspection: Verifies die presence, bond wire layout, and voiding. We maintain a golden sample library for instant comparison.
  • C‑SAM (Scanning Acoustic Microscopy): Detects internal delamination and cracks invisible to X‑ray – crucial for moisture‑sensitive or reworked components.
  • JTAG ID verification: Reads hardware‑fused device IDCODE – impossible to counterfeit.
  • Destructive decapsulation: Used on suspicious batches to expose the bare die and verify manufacturer logo, die revision, and consistency.

Inspection Equipment & Pass Criteria

Equipment Inspection / Measurement Pass Criteria
LCR Meter R, C, L, ESR, Q Within ±1% / ±5% tolerance
Digital Multimeter Diode Vf, shorts/opens, pin impedance Matches golden sample or datasheet
Microscope (50–200×) Marking quality, surface, leads/balls No sanding, no residue, crisp marking
X-Ray Die, bond wires, voiding Matches golden reference; void ≤25% per ball
C-SAM Delamination, cracks No significant red/yellow areas
Solderability Tester Wetting area, angle ≥95% coverage, angle < 90°

Nonconforming Material Disposition

  • Immediate segregation and red NC tag, moved to locked quarantine area.
  • Quality Engineer re‑inspection before final decision.
  • Disposition options: Return to vendor (RTV), exchange, or sort & use only with signed Engineering approval.
  • Supplier Corrective Action Report (SCAR) or 8D within 48 hours. Corrective action verified on next three incoming lots.

Device‑Specific Focus

  • ICs / BGA: X‑ray (die verification), C‑SAM, JTAG ID, decap if suspicious.
  • Passives (R/C/L): LCR measurement, withstand voltage for capacitors.
  • Connectors / Switches: Insertion force, contact resistance (4‑wire Kelvin).
  • MSD (Moisture‑Sensitive Devices): Vacuum seal check, HIC reading, MSL label verification.

Traceability & Documentation

  • Photographs of suspicious parts, labels, and defects saved in batch archive.
  • 5–10 golden samples retained from first shipment or batch change.
  • Minimum log: receiving date, PO, lot number, inspector, result, defect photos, disposition.
✅ Trusted by global customers
Our incoming inspection has intercepted thousands of counterfeit and substandard components, ensuring zero defective parts reach your production line. We stand behind every batch with full traceability and rapid corrective action.

Contact Us

Superb Automation Co., Limited

Website:www.superb-tech.com

For 25 years your reliable partner in Electronics & PCBA!

HK number: 85260404363

Email :Info@superb-tech.com

Whatsapp:8613396081443