A glass to metal seal is formed between the insulative preform 12 and {HEAD ~ the metal package} 14 at {TAIL ~ the aperture} 16 to provide a hermetically sealed package 
at
A glass to metal seal is formed between the insulative preform 12 and { HEAD ~ the metal package } 14 at { TAIL ~ the aperture } 16 to provide a hermetically sealed package
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH