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Fr4 PCB Board with Alumina Ceramic Substrate. Comprehensive Certifications: UL, RoHS, SGS, and ISO9001 certified for global compliance. Fast Sample Delivery: PCB samples delivered within 3-4 days; assembly samples within 2 days. Advanced Quality Testing: Includes visual inspection, flying probe, impedance control, and AOI. Premium Surface Finish: Immersion gold finish ensures high reliability and solderability. Flexible Shipping Options: Supports DHL, UPS, FedEx, TNT, EMS, sea freight, and customer forwarders. Multiple Payment Methods: Accepts T/T, PayPal, Western Union, L/C, and small-amount payments.