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