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Design for reliability of polysiloxane-based electrical-optical circuit boards
1Technische Universität Dortmund, Fakultät für Elektrotechnik und Informationstechnik, Arbeitsgebiet Mikrostrukturtechnik (AG MST), D-44227 Dortmund, Germany. dengke.cai@tu-dortmund.de
Applied Optics
|July 22, 2010
Summary
Polysiloxane-based electrical-optical circuit boards (EOCBs) demonstrate excellent mechanical and optical stability under extreme conditions. These reliable EOCBs achieve a predicted failure rate of 400 FITs, ensuring long-term performance in telecommunications.
Area of Science:
- Materials Science
- Optical Engineering
- Reliability Engineering
Background:
- Electrical-optical circuit boards (EOCBs) are crucial for telecommunications.
- Assessing the environmental stability of polysiloxane-based EOCBs is essential for reliable deployment.
- Existing standards from Telcordia and IPC/IEC provide a framework for testing.
Purpose of the Study:
- To verify the environmental stability of polysiloxane-based EOCBs.
- To determine acceleration factors for reliability testing.
- To predict the long-term failure rate of EOCBs.
Main Methods:
- Conducted three environmental stability verification tests based on established standards.
- Determined acceleration factors using defined test models.
- Calculated required sample sizes for mechanical and optical stability verification.
- Prepared and tested EOCB samples under various environmental conditions.
Main Results:
- EOCBs exhibited good mechanical stability.
- Packaged EOCBs demonstrated low and stable optical loss (<0.1 dB/cm) and numerical aperture.
- Performance remained consistent even under extreme environmental conditions.
Conclusions:
- Polysiloxane-based EOCBs meet stringent reliability objectives.
- A predicted failure rate of 400 FITs was established for 14.4 years of operation.
- EOCBs are suitable for demanding telecommunications applications requiring high stability.
