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