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