Design for manufacture(DFM)

WELCOME TO BICHENG

	Design For Manufacture

	Inner Layer

	Laminating

	Drill

	Etching

	Outer Layer

	Solder Mask

	Silkscreen

	Carbon Ink

	Peelable Mask

	Surface Finish

	Contour

	Special Tolerance

Serial NO.	Procedure	Item	Manufacturing capability
			Large volume （S<100 m2）	Middle volume （S<10 m2）	Prototype（S<1m2）
			Large volume （S<100 m2）	Middle volume （S<10 m2）	Prototype（S<1m2）
48	Silkscreen	Min.width of silkscreen text	6mil	6mil	5mil
49		Min.height of silkscreen text	35mil	35mil	30mil
50		Min.space from silkscreen to pads	6mil	6mil	5mil
51		Colour of silkscreen	White, Black, Yellow
52	Carbon ink	Carbon ink covers conductor or pads	14mil	13mil	12mil
53	Carbon ink	Mid distance from carbon ink to pads	12mil	11mil	10mil
54	Peelable mask	Peelable mask covers conductor or pads	8mil	7mil	6mil
55		Min.distance from peelable mask to pads	14mil	13mil	12mil
56		Max.via-plug of Silk-screen method	2.0mm	2.0mm	2.0mm
57		Max. via-plug of aluminum foil method	4.5mm	4.5mm	4.5mm
58	Surface finish	Thickness of nickel of ENIG	3-5um	3-5um	2-6.35um
59		Thickness of Gold of ENIG	0.05-0.1um
60		Thickness of nickel of Gold finger	3-5um
61		Thickness of Gold of Gold finger	0.1-1.27um
62		Thickness of tin of HASL	2.54-6.35um
63		Thickness of OSP	0.2-0.5um
64		Thickness of tin of Immersion tin	0.2-0.75um
65		Thickness of silver of Immersion silver	0.15-0.75um

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