Background In recent years, the government, during acquisition reform, has not required space systems manufacturers to absolutely utilize space-qualified parts in their systems. Systems manufacturers have evaluated the best part available and determined through a self-selected series of tests and analyses that a specific device is acceptable and meets the system performance and reliability requirements. However, based on a number of recent problems experienced, which have had a critical impact upon launch schedules as well as on-orbit performance, it has been determined that a more stringent approach to parts, materials and processes must be followed. Therefore, a review of the space level requirements for utilization was begun. The government is intending to re-invigorate specs and standards on contract for the space user community The specs and standards will require the use of a full-up space qualified part Non-space qualified parts will be by exception only and will still require the same types of analysis and testing
Background Presented an overview to Xilinx in December 2004 of space requirements for new technology Meeting held with Xilinx in March 2005 to discuss space requirements –Some space contractors part of meeting (General Dynamics, Honeywell, JPL, Lockheed Martin) –Boeing started to work with Xilinx at a later time period Weekly telecons held with Xilinx starting April 2005 to develop a flow for hermetic and flip-chip devices Started with MIL-PRF-38535 Class V Flow –Flip-chip devices had to take into account tests and inspections that do not make sense –Flip-chip devices also require tests/inspections that hermetic devices do not require Flow also required to account for column grid array packaging
Current Status Preliminary flow developed Xilinx has generated procedures and process documents Aerospace in the process of reviewing procedures and process documents –Provided comments to Xilinx and just received responses –Requires review of Xilinx responses Aerospace requires information from the foundry relating to wafer level reliability –Need to understand data that we have and determine what technologies it is applicable to –0.25 um, 0.15 um, 90 nm, 65 nm ???? –May need additional data from foundry Reviewed requirements for new technology insertion with Xilinx –Wafer foundry data will satisfy many of the requirements –Still need to work long term reliability (life test) data for 6000 hrs
New Technology Approach New Technology Evaluation Characterization All aspects of the technology must be evaluated Process is well controlled – SPC Reliability – long term Radiation Overall parametric performance is well defined including margins Physics of Failure analysis including electrical, mechanical, thermal and chemical properties that could contribute to root cause failures throughout the product life cycle Process and performance margins and their sensitivities Process trending Yield enhancement Failure Modes Effects Analysis to consider each mode of failure to ascertain the effects on device operation and reliability of each failure mode Process/test optimization Other tests based on information determined from the suppliers data and/or system application requirements
New Technology Approach Qualification Validation that all the previous characterization testing and evaluations of failure mechanisms shows the technology meets and exceeds quantifiable, specific, unambiguous and stringent requirements for space applications Includes three categories Manufacturing line qualification Technology qualification Product qualification Approach Utilize standard military specification tests Include additional tests as defined by the physics of failure analysis, Failure Modes Effects Analysis, Characterization tests and system level and mission requirements New test methods maybe required to be established
Next Steps With the support of Xilinx, complete space flow and documentation reviews Space community review of flow Resolution of any open issues Work with DSCC to begin the QML Class V (space) audit requirements –Certification audit of Xilinx facility –Audit of foundry –Qualification of Virtex to space requirements
Summary Working with Xilinx to develop a space flow for new technology insertion of Virtex family of FPGA’s Broader space community involvement required to ensure buy-in DSCC involvement needed for approval of QML Class V Good support from Xilinx has been very helpful in this undertaking
Your consent to our cookies if you continue to use this website.