RJR Technologies has built a prototype of an innovative Datacom Transmit-Receive Optical Subassembly (TROSA) package for 200-400Gb applications, designed to redefine industry standards in cost, performance, and design flexibility. By replacing the traditional dual FAU HTCC-Kovar package with advanced materials like liquid crystal polymer (LCP) and copper-moly-copper (CMC) thermal bases, this package delivers the same high performance at just half the cost of conventional Kovar solutions, providing significant value to customers seeking both efficiency and flexibility.
This TROSA package features an internal PCB, which enables circuit design versatility and supports complex optical circuit topographies. The customizable LCP cavity design allows for intricate layouts, boosting functionality and simplifying assembly. The package is compatible with wedge bond, ball bond, and ribbon wire interconnects, making it ideal for optimizing product performance and enhancing linearity. Additionally, the CMC thermal base material ensures efficient thermal expansion compensation, enhancing the package’s durability in high-performance settings. With a solderable package bottom and clamping capability to support up to 60kg on the lid, this design provides versatility for both product and board-level assembly and testing.
Reliability testing is a cornerstone of RJR’s commitment to delivering robust, long-lasting products. A key aspect of this involves analyzing the internal gas composition to prevent microelectronic component failures from corrosion. RJR adheres to MIL-STD-883, MIL-STD-750, Method 1018 standards, focusing on Residual Gas Analysis (RGA) to determine the maximum acceptable internal water vapor levels. For this testing, RJR partnered with industry renowned EAG Laboratories.
The TROSA package was subjected to rigorous testing, including a challenging 85°C/85%RH environment for 1,000 hours. The results demonstrated moisture levels around 240 ppmv, verifying the package’s high reliability and suitability for long-term operation. This performance underscores RJR’s TROSA package as a high-quality, dependable choice in datacom applications, designed to meet industry demands for cost-effective and reliable solutions in the most demanding environments.
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