Hi Karen,
You did not give us a PCB material nor the size of the LLCCC. Your biggest 
problem will be solder joint reliability, if, as I suspect, you use an FR-4 PCB.
The global thermal expansion mismatch between the ceramic CC and the FR-4 
will cause SJ creep-fatigue faulure. There is a long history on this.
To help you specifically with both the manufacturing and long-term 
reliability problem, I need more details.

Werner 


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