{HEAD ~ The semiconductor device} 15, wherein the spacer is an organic material selected from the group consisting of butyl rubber, EPDM rubber, silicone rubber, and {TAIL ~ fluororubber} 
{ HEAD ~ The semiconductor device } 15 , wherein the spacer is an organic material selected from the group consisting of butyl rubber , EPDM rubber , silicone rubber , and { TAIL ~ fluororubber }
HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL