PWB Fill Factor


	              
	      COMPONENT USE AREA CALCULATION FOR
   	     CIRCUIT CARD ASSEMBLIES (FILL FACTOR)
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USEABLE PWB AREA     = 30 in sq
DIVIDED BY	         -----------   
TOTAL COMPONENT AREA = 20 in sq 
EQUALS               = 1.5 FILL FACTOR

		 20	  1
		--- OR --- = .6666 = 67% FULL
		 30	 1.5

FOR FLAT PACKS AND DIPS 
		L X W = AREA

FOR SMALL CIRCULAR COMPONENTS (UP TO DIA .375) 
		DIA SQUARED = AREA

FOR LARGE CIRCULAR COMPONENTS (OVER DIA .375)
		DIA X .7854 = AREA

FOR AXIAL LEAD COMPONENTS
		L X W = AREA

FOR RADIAL LEAD COMPONENTS
		L X W = AREA

********* ON ALL AREA CALCULATIONS BE SURE TO INCLUDE PAD DIA ***********
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