Embedded passive component: a way to miniaturization

 
Embedding Passive Components is expected to lead to reduced volume and weight, increased electrical performance, larger design freedom and the elimination of solder joints which is sometimes degrading the reliability of our circuits for space applications.

The above picture shows the redesigned version of the Spacecraft Interface Module board, including two layers of embedded passive components inside the rigid-flex printed circuit board.

Objectives
To investigate the suitability of embedding passive components in printed circuit boards for space applications through an extensive Evaluation Test Plan and the redesign of the Spacecraft Interface Module flight board from QinetiQ Space.

Achievements
An in-depth assessment, including line audit, of the AT&S Embedded Component Packaging technology was performed. The Evaluation Test Plan revealed no failures in the microvia interconnection to the component, whereas component performance is adequate, albeit not at space-level requirements.

A functional demonstrator, redesigned with embedded components, was manufactured by AT&S and performed up to par with its Surface Mount Technology (SMT) counterpart.

The picture to the left shows passive components, marked in red, that were embedded inside the redesigned Spacecraft Interface Module board.

Further work

• Establish a European supply chain with an extension of the available voltage, power and temperature ratings
• Realize a Technology Demonstrator with embedded passive components to verify design and procurement flow and validate product reliability and performance
• Perform the industrial supply chain space qualification