Sony SNC-CS50P - Manual (Page 14)

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CCDs (Super HAD CCD/Exwave HAD/SuperExwave Technology)
As a leading manufacturer of image sensor products, Sony
has developed a wide variety of CCDs for a number of
decades, and these CCDs have been used worldwide in a
great number of camera products. Sony CCDs utilize a
common HAD structure that reproduces images with
reduced smear and low noise characteristics. In addition
to the benefits of the HAD structure, refinements in the
On-Chip Lens (OCL) layer and CCD‘s photo sensors have
significantly contributed to improved CCD picture
performance.
The SNC-RZ50, SNC-RX550, and SNC-CS50 Series of
network cameras incorporate a Super HAD CCD, CCD
with Exwave HAD technology, and CCD with
SuperExwave technology, respectively. These CCDs have
been incorporated into each camera making them ideal
for applications ranging from surveillance to web
attractions. In the following sections, we will take a
detailed look at the different CCD types.
Super HAD CCD
When compared to the first generation of On-Chip Lenses
developed in 1989, the Super HAD CCD has an improved
OCL layer providing much greater sensitivity. As shown in
Fig. 1, the first-generation On-Chip Lenses above each
pixel are separated by gaps, and the light that falls on
these gaps is wasted. Whereas, the Super HAD CCD OCL
structure is virtually gapless (Fig. 2), which raises its light-
convergence capability and provides a drastic
improvement in sensitivity.
On-chip Lens
Color Filter
Photo Shielding Film
On-chip Lens
Color Filter
Poly Si
Vertical CCD
Photo Shielding Film (electrode)
Si-substrate
Internal Lens
Reduction of the
insulating film
thickness
Sensor
Poly Si
Vertical CCD Sensor
On-chip Lens
Gap
Color Filter
Photo Shielding Film
N-Substrate N-Substrate N-Substrate
Poly Si
Vertical CCD Sensor
Gapless
Fig. 1 First-generation
On-chip Lens
Fig. 2 Super HAD CCD Fig. 3 CCD with Exwave HAD
Technology