the third step of arranging another member on the joining layer and heating the joining layer to not less than a temperature which is {HEAD ~ a melting point} of {TAIL ~ boron oxide} for a predetermined period of time 
the third step of arranging another member on the joining layer and heating the joining layer to not less than a temperature which is { HEAD ~ a melting point } of { TAIL ~ boron oxide } for a predetermined period of time
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH