Valuation Models for Secondary Source Design Transfer Packages
Value design transfer packages by auditing native CAD and firmware source completeness against secondary bring-up friction and NPV returns.
Stack up Matching
Meaning
A design practice aligns the physical layer arrangement of a printed circuit board with the manufacturing capabilities of the chosen fabrication house. Implementing stack up matching ensures that the thickness, dielectric constant, layer spacing, and copper weight of each layer in the board design are supported by the factory’s raw materials. This alignment prevents expensive delays during the tooling phase.
Impedance Control
High-speed signal lines require precise trace dimensions to maintain signal integrity. The designer calculates trace widths based on the distance to the reference ground plane. If the stack-up from the factory does not match the design file, signal reflections and data errors can occur.
Thermal Balance
Asymmetrical layouts can cause the board to warp during the high-temperature solder reflow process. Designers distribute copper layers evenly across the center line of the board to prevent warping. This mechanical stability ensures the boards remain flat for component assembly.
Fabrication Yield
Working closely with the fabrication partner allows the team to optimize the board thickness and material selection. Standardizing on common core materials and prepreg layers keeps costs low and improves material availability. This collaboration ensures a high yield of boards during mass production, which lowers the overall unit cost.