Flexible Durability of Standard FPC-Flexible printed circuits (FPC) -NIPPON MEKTRON,LTD.

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Flexible Durability of Standard FPC

Structure		Single-sided FPC	Double-sided FPC	3 Layer Flex Board
	Copper Foil Thickness (m)	35	33 (TH Plating 15)	35
	Copper Foil Thickness (m)	35	33 (TH Plating 15)	33 (TH Plating 15) Double-sided
	Base-film Thickness (m)	25	25	25
	Cover-film Thickness (m)	25	25	25
Flexural Resistance endurance (IPC) Flex Radius: R=2.0		One million times	5 thousand times	250 times
Folding endurance(MIT) Flex Radius: R=3.0		60 thousand times	2 thousand times	150 times

IPC Flexural Resistance test
(IPC standard TM-650)

MIT Folding Endurance test
(ASTM D2176)