Glass cloth for electronic materials

Glass cloth for printed wiringboards

printed wiringboard model (cross section)

Note) Glass cloth is not used for all printed wiringboards.

Glass cloth specifications

IPC specifications (excerpts)	Thickness (mm)	Weight (g/m²)	Density (/25mm)		Manner of weaving
			Warp	Weft
106	0.035	25	56	56	Plain weave
1080	0.055	47	60	46	Plain weave
3313	0.075	83	60	62	Plain weave
2116	0.095	104	60	58	Plain weave
1504	0.125	148	60	50	Plain weave
1501	0.140	165	46	45	Plain weave
7628	0.180	209	44	32	Plain weave

High performance glass cloth

With the remarkable development of digital technology, electronic equipment typified by PCs and smartphones has become increasingly lightweight, thin, small, and functional, and manufacturers are strongly urged to enhance the characteristics of glass cloth.
Based on the development of glass composition and textile technology as well as textile processing technology, Nittobo offers glass cloth products, making the most of its strengths as an integrated manufacturer.

Low-dielectric-property glass cloth (NE glass)

As computers, mobile terminals, and communications infrastructure have evolved into increasingly high-speed, high-frequency systems, manufacturers of printed wiringboards have been required to use low-dielectric-property materials to reduce transmission loss. To that end, Nittobo has achieved low dielectric constant and low dielectric dissipation factor using NE-glass yarn that it has developed independently rather than conventional E glass.

	Dielectric constant (1GHz)	Dielectric dissipation factor (1GHz)
E glass	6.8	0.0035
NE glass	4.8	0.0015

• * All data listed above are examples of actually measured values and not standard ones.

Low-CTE glass cloth (T glass)

Excellent dimensional stability and increased rigidity can be achieved using T-glass yarn, which is characterized by its low coefficient of thermal expansion (CTE) and high tensile elasticity.

	Thermal expansion coefficient (×10-6/℃)	Tensile elasticity modulus (GPa)
E glass	5.6	75
T glass	2.8	86

• * All data listed above are examples of actually measured values and not standard ones.

Ultra-thin glass cloth

Thinner glass cloth is desired for materials to meet the requirements of printed wiringboards as such materials are used at high densities and have become increasingly lightweight, thin, and small. Not only is Nittobo's ultra-thin glass cloth exceptionally thin, it excels in the ability to make very small holes in both laser and drill processing as well. Furthermore, this material is excellent in terms of lamination characteristics, such as dimensional stability and surface smoothness.

IPC specifications (excerpts)	Thickness (mm)	Weight (g/m²)	Density (/25mm)		Manner of weaving
			Warp	Weft
1037	0.025	24	69	72	Plain weave
1027	0.020	19	74	74	Plain weave
1017	0.015	13	95	95	Plain weave
1010	0.013	10	95	95	Plain weave

• * All data listed above are examples of actually measured values and not standard ones.