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Ceramic substrate
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Ceramic substrate Meiwa provides ceramic substrates with least camber and very smooth surface, which enables even for thin film application.
Due to its high thermal conductivity, high dimensional Accuracy, stable snap ability, Meiwa substrates are suitable for ultra small chip resistors, chip network resistors and thick film hybrid printed substrates with through holes.

Besides, Alumina 99.9% thin-film substrate and its processed products are also available.

Meiwa Plus

15-Ø0.08mm
Ceramic substrate It is possible to manufacture and supply Circular Alumina Substrates.
The maximum outer diameter is around 120mm.
Ceramic substrate Alumina subatrates with micro-holes.
We can supply Alumina substrates with some micro-holes that the diameter is around 0.08mm in minimum.
15-Ø0.12mm    15-Ø0.20mm

Specifications
Material Alumina
(Aluminum Oxide) 
Product code number A-6  A-996
Chemical analysis Al2O3 96% Al2O3 99.6%
Color White
Apparent specific gravity [Kg/m3] 3.7x103 3.8 to 3.9x103
Water absorption [%] <0.01
Safety service temperature [℃] 1,400 1,200
Flexural strength [MPa] >400 600
Compressive strength [MPa] >1,070 N.A
Thermal expansion
20~ 500℃ 7.2x10-6 7 to 8x10-6
20~ 800℃ 7.8x10-6
20~1000℃ 8.1x10-6 N.A
Thermal conductivity [W/(m・K)] 24 27 to 30
Dielectric strength [kV/mm] 10
Volume resistivity [ohm-cm] 25℃ >1014
300℃ >1011
500℃ >108
Dielectric constant (1MHz) 9.3 10.2
Dielectric loss (1MHz) 0.0001 0.0002

General Quality Characteristics (Dimension Tolerance)
Products Pressing Laser processing
Dimensions (max. inches) 4.5x7.0 4.0x7.0
Dimension Tolerance ±0.60%
NLT±0.05mm
±0.30%
NLT±0.05mm
Plate thickness(㎜) 0.1 to 1.0
Plate thickness tolerance ±10%
Camber tolerance >0.06/25.4mm
At plate thickness 0.28mm below
>0.13/25.4mm
Through hole(㎜) >Ø0.3
Through hole tolerance ±0.60%
NLT±0.05mm
±0.05mm
Right angle (㎜) ±0.3 ±0.2
Surface roughness Ra(μm) <0.5

Standard diemnsion and shape
TYPE Dimension Unit size Unit q'ty
mm inch
0402 01005 60x49.5x0.1t
60x70x0.1t
- -
0603 0201 60x49.5x0.2t
64.2(60,65)x75(70,74)x0.2t
- -
1005 0402 60x49.5x0.28t
60x70x0.28t
0.95x0.48 5,520
7,910
1608 0603 60x49.5x0.4t
60x70x0.4t
1.50x0.80 2,166
3,080
2012 0805 60x49.5x0.47t 1.95x1.20 1,102
3216 1206 60x49.5x0.5t 3.00x1.50 558
3225 1210 60x49.5x0.5t 3.00x2.50 324
5025 2010 60x49.5x0.5t 5.00x2.50 198
6332 2512 60x49.5x0.5t 6.30x3.10 126
1608-2凹 0603-2凹 60x49.5x0.5t 1.60x1.60 896
1608-4凸 0603-4凸 60x49.5x0.5t 3.20x1.50 429
1608-4凹 0603-4凹 60x49.5x0.5t 3.20x1.60 448

Alumina 96% substrate reflection ratio (Daylight reflection ratio) Unit : %
Wavelength Thickness
0.28mm 0.50mm 0.97mm
All wavelength 300~2,500nm 75.8 83.9 90.3
Near ultraviolet-visible rays area 300~780nm 77.5 84.9 91.3
Near ultraviolet rays area 780~2,500nm 73.5 82.7 89.0
Measurement standard : JIS K 5602
The above-mentioned value is typical data, not guaranteed data.

Reflectionspectrum


Inquiry

Sales and Business Control Group
Phone +81-561-48-5012, FAX +81-561-48-5058
E-MAIL info@phononmeiwa.co.jp

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