SI Test Printed Circuit Board

SI Test Board (Signal Integrity Test Board / SI Test Coupon)

With the rapid iteration of AI compute power and ultra-high-speed optical communications, high-bandwidth links such as 800G/1.6T optical transceivers,   commercial deployment. Signal distortion, impedance mismatch, and excessive channel loss have become critical pain points in hardware R&D. As the core vehicle for verifying substrate performance, manufacturing processes, and high-speed link reliability, the SI test board has become an indispensable standard test carrier in the R&D phases of data centers, optical communications, and high-end servers.

As a one-stop PCB & PCBA integrated service provider, we work in deep collaboration with premium PCB manufacturing facilities in Taiwan, China, focusing on two major strategic tracks: high-precision SI test boards and 800G/1.6T high-speed optical module PCBs. Leveraging industry-leading impedance control processes, mature mass-production systems, and extensive experience serving top-tier global customers, we deliver full-link high-speed PCB solutions for leading communications and cloud-computing enterprises worldwide.

Core Technological Advantages

Our SI test boards achieve dual-sided impedance control within a precise tolerance of ±3Ω—a process benchmark that places us firmly in the industry’s top tier. This capability fundamentally resolves common challenges such as excessive impedance variation across layers, poor matching between front- and back-side signal traces, and inconsistency in high-vs. Low-frequency loss performance. Through our partner’s advanced high-precision production lines in Taiwan, we have established a closed‑loop management system encompassing “simulation design – precision manufacturing – comprehensive electrical testing.” In the preliminary stage, we employ Polar SI9000 and 3D electromagnetic simulation software to pre-model stack-up, routing, and via structures, optimizing back-drill stub, differential coupling, and micro-via / buried-via configurations. During production, we utilize LDI high-precision exposure, vacuum uniform etching, and micron-level lamination equipment to rigorously control copper foil thickness, dielectric thickness, and line-width/space variations. Finished boards are subjected to per-unit TDR impedance testing and network analyzer measurements to verify critical SI parameters including insertion loss, return loss, crosstalk, and eye diagrams. Each batch is accompanied by a comprehensive test report, ensuring highly consistent Coupon impedance across multiple lots and panelized arrays. Our boards reliably support full-scope test scenarios, including high-speed laminate Dk/Df loss verification, process capability benchmarking, connector link matching, and temperature/humidity reliability aging tests.

Application Coverage

Our products serve the entire high-speed communications ecosystem:

1. AI server and switch R&D: for signal integrity characterization of PCIe 5.0/6.0 backplanes, DDR5 memory channels, and high‑speed connectors.

2. 800G / 1.6T high-speed optical transceiver development and production: compatible with silicon photonics and CPO co-packaged optics links, verifying high-frequency short-reach transmission loss performance.

3. High-end substrate and process qualification: assisting customers in comparing the impact of various high-speed laminates (e.g., Megtron, Isola), copper foil roughness profiles, and back-drill processes on signal attenuation.

4. Factory quality monitoring for volume production: embedding SI test coupons in production panels for real-time process-drift surveillance, mitigating the risk of signal failures in mass‑produced units.

One-Stop Delivery Capability

Leveraging a robust supply chain and integrated one-stop service, we cover the entire workflow from PCB customization, SMT assembly, and PCBA population to functional testing—eliminating the need for customers to coordinate multiple suppliers and significantly shortening R&D prototyping cycles. Our products are already in stable supply to global industry leaders including Oracle, Google, Zhaolong Interconnect, and Luxshare Precision, and we are deeply engaged in next-generation pre-research programs for overseas cloud data centers and leading domestic high-speed optical communications companies. Compared to conventional PCB vendors, we combine the mature high-speed board mass-production expertise of our Taiwan partner with agile local support, enabling us to handle both small-batch R&D prototypes and high-volume stable deliveries—perfectly aligning with customer requirements across the entire lifecycle from development validation to scaled production.

Future Outlook

As 1.6T optical transceivers move toward mass deployment and 3.2T technology pre-research advances, high-speed signal transmission rates will continue to climb, raising the precision bar for SI test boards. We will further deepen our technical collaboration with premium Taiwan production lines, iterate ultra-low-loss SI test board processes, refine our dual‑side impedance control system, and simultaneously upgrade our dedicated 800G/1.6T optical module PCB solutions. With stringent process standards, dependable delivery capabilities, and comprehensive one-stop services, we are committed to becoming the trusted signal-integrity R&D partner for high-speed hardware enterprises worldwide.