A riser may be used to provide the spacing between {TAIL ~ the cover} and the taped lead frame assembly, so that {HEAD ~ the cover} does not contact the taped lead frame assembly 
A riser may be used to provide the spacing between { TAIL ~ the cover } and the taped lead frame assembly , so that { HEAD ~ the cover } does not contact the taped lead frame assembly
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH