This guide explains how to spec, design, assemble, and qualify an optical PCB so it can move from prototype builds into stable production for photonics, imaging, sensing, and display hardware. Many teams start with “transparent PCB” as a cosmetic idea. This guide serves as an in-depth resource for engineers, designers, and project managers involved in the development of optical module PCBs. It will explore the complete product lifecycle, from design principles and advanced material selection to the intricacies of precision fabrication. Integrated circuits and reference designs help you create a smaller and faster optical module design used in high-bandwidth data communication applications. Whether you are creating a 100-Gbps or 400-Gbps, small form-factor pluggable (SFP) module, SFP+ transceiver, XFP module, CFP, X2/XENPAK module. The optical module serves as a crucial component in optical fiber communication systems, operating at the physical layer, which is the lowest layer in the OSI model. This document focuses on projection optical modules that incorporate Texas Instruments' DLP Display chips and are designed to project an image onto a surface for a variety of applications. Definition: An Optical Module PCB is the internal circuit board of a transceiver (like SFP, QSFP, or OSFP) responsible for converting electrical signals to optical signals and vice versa. Designing these chips requires deep knowledge of their electrical, optical, and thermal characteristics, as well as compliance.