TDK DDS-4 4mm Tape DC4-150REA Leaflet

* Varies depending upon drive. ** Without dewing.
• Dimensional specifications are nominal value.
• Basic specifications are without data compression.
• The DC4-170S can only be utilized in drives that are compatible with the DAT 72 format.

3

 Electron Beam Curing

4

 Three Dimensional Compound

1

 Compared to DDS-4’s area recording density 

 of 706kpbmm

2

, DAT 72 achieves 1185kpbmm

2

.

2

 emu stands for electro magnetic unit.

DAT 72 features the highest recording density of any data tape

1

.

As a result, DAT 72 data cartridges must be constructed with a 
magnetic layer that can record extremely short wavelengths. 
That’s why TDK employs ultra-fine Super Finavinx metal mag-
netic particles, exclusive high 

σ

s technology that TDK specially  

developed for DAT 72. The “

σ

s” indicates each particle’s magnet-

ic energy; a high 

σ

s value means each particle has superior ability  

to record and store the magnetized data signal. The 

σ

s of TDK  

DAT 72 tape, 156emu/g

2

, represents a significant improvement 

over the 143emu/g of TDK DDS-4  
tape. And because the Super 
Finavinx particles are packed 
on the magnetic layer in high 
density and with exceptional 
magnetic orientation uniformity, 
the DAT 72 format’s short 
wavelength data signals can be 
recorded with total reliability.

σ

Due to DAT 72’s high recording density, the magnetic layer must 
have totally uniform thickness. A dual layer tape coating structure 
comprises DAT 72. The non-magnetic base layer is precision-
manufactured to enhance lubricity and to provide a consistent 
foundation for the magnetic upper layer. The base layer features 
highly dispersed, non-magnetic pigment in a uniform pattern. 
The magnetic upper layer, comprised of ultra-fine Super Finavinx 
magnetic material is applied in a high-precision, thin coating. 
As a result of the magnetic layer’s extremely uniform evenness 
and thickness, DAT 72 is able to record short wavelength data 
signals with high accuracy. TDK DAT 72 is exceptionally reliable 
recording media, featuring stable, high-output characteristics.

To enable optimal performance from TDK DAT 72, two varieties 
of binders are utilized: the electron beam cured EB binder

3

 and 

the TDC binder

4

. By providing strong molecular linkage 

between the internal coatings of the non-magnetic base layer and 
the magnetic upper layer, the binders create a robust structure 
that prevents flaking of the magnetic surface and defends against 
wear at the tape edges. These maximum strength cross-linking 
binders reinforce the coating structure of the non-magnetic base 
layer, creating a tough tape that maintains a low error rate even 
after repeated read and write cycles and other demanding appli-
cations. 

For the tape cartridge and mechanism, TDK utilizes materials 
that optimize performance and employs designs that guarantee 
durability and reliability. Along with ensuring a stable tape run, 
the cartridge also provides exceptional tape protection.

• Product specifications and appearance may change without notice. 
• Due to printing characteristics, the colors in this catalog may vary slightly from the actual product. • Catalog contents are current as of March 2004. 

Magnetic particle

Linear recording density

Area recording density

Data transfer rate

Storage capacity

Coercivity

Remanence

Squareness ratio

External cartridge dimensions

Tape width

Tape thickness

Tape length

Temperature

Humidity

Max. wet bulb temperature

Temperature

Humidity

Max. wet bulb temperature

—

kbpmm

kbpmm

2

MByte/s

Byte

kA/m

mT

—

mm

mm

µ m

m

∞C

%RH

∞C

∞C

%RH

∞C

Super Finavinx (metal)

6.4

1185

3.5*

36G

190

450

0.91

73 X 54 X 10.5

3.8

5.2

170

+15~+55

10~80**

+26

+26

+5~+32

20~60**

TDK DAT 72 tape

Previous DDS tape

Linked with Hardness 
Linked with Elasticity 
Linked with Adhesiveness 

Absorption site to non- 
magnetic pigment particle 

Connector of binders