Structure of a CCD 3.
One pixel
Channel
stops to define the columns of the image
Transparent
horizontal electrodes
to define the pixels
vertically. Also
used to transfer the
charge during readout
Plan View
Cross
section
The diagram
shows a small section (a few pixels) of the image area of a CCD. This pattern
is reapeated.
Electrode
Insulating oxide
n-type silicon
p-type silicon
Every third electrode is connected together. Bus wires
running down the edge of the chip make the
connection. The channel stops are formed from high
concentrations of Boron in the
silicon.