A high frequency semiconductor device contains a semiconductor element in {HEAD ~ a cavity} formed by {TAIL ~ a dielectric board} and a cap 
formed by
A high frequency semiconductor device contains a semiconductor element in { HEAD ~ a cavity } formed by { TAIL ~ a dielectric board } and a cap
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH