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CD Card can store large
amounts of digital information/data on a very small surface. While
some companies differ, the primary size is 36 to 50 megabytes
of storage. The size of the CD Cards is about or bit larger than
the size of typical business cards (i.e., 60mm X 86mm).
CD-ROM Cards are optical CD Cards that are stamped using an injection
molding process. Most of the mass of a CD Card is an injection-molded
piece of clear polycarbonate plastic that is about 1.2 millimeters
thick. During manufacturing, this highly abrasive plastic is impressed
with the microscopic bumps that make up the long, spiral track.
A thin, reflective aluminum layer is then coated on the top of
the CD Card, covering the bumps. Prior to producing a CD-ROM card,
information must be arranged, or pre mastered, into a suitable
CD-ROM file format. For most CD Cards, CD-ROM pre mastering software
is used to transfer and organize information into a CD-ROM format
(i.e., ISO 9660). Once this process is complete, the master stamper
is made on special a glass for replication. The CD-ROM Card surface
is mirror covered with billions of tiny bumps that are arranged
in a long and tightly wound spiral. The CD-Rom drive reads the
bumps with a series of precise lasers and interprets the information
as bits (zeros and ones) of data. CD Card tracks are so small
that they have to be measured in microns. The CD Card track is
approximately 0.5 microns wide.
When a CD-ROM Card is played, the laser beam passes through the
CD Card's polycarbonate layer, reflects off the aluminum layer
and hits an optoelectronic device that detects changes in light.
The flat parts of the layer are called “lands”. The bumps reflect
light differently than the lands of the aluminum layer and are
read by either having a 0 or a 1 (bits we previously talked about).
The optoelectronic sensor detects these changes in reflectivity,
and the electronics in the CD-ROM drive interpret the changes
as data bits.
CD-R Card works by replacing the aluminum layer with an organic
dye compound. This compound is normally reflective, but when the
laser focuses on a spot and heats it to a certain temperature,
it "burns" the dye, causing it to darken, then the each burnt
spot represents as a bump. After the dye has been burned in a
spot, it cannot be changed back. CD-R Card is not as durable as
CD-ROM Card but because of its low set cost the technology is
used for low volume production.
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Replication and Print
We use duplication and
label print for quantity less than 1000 CD Cards. For quantity
over 1000 CD Cards we use replication process and offset print.
Please go to Replication and Print pages for more details. |
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CD Cards
Business Card Shape CD Card
CD-R 50mb memory capacity
Clear | Silver |
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Shape CDs
CD-Rom cutClick on shape CDs for more detail
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