In the surface of {HEAD ~ a lower die} 104 in {TAIL ~ a resin sealing mold}, a region where an external leads 18 of a lead frame 12 and its peripheral regions having a width of 0.1 mm are mirror finished to form a mirror face region 22 
In the surface of { HEAD ~ a lower die } 104 in { TAIL ~ a resin sealing mold } , a region where an external leads 18 of a lead frame 12 and its peripheral regions having a width of 0.1 mm are mirror finished to form a mirror face region 22
OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL 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 OTH OTH