A solid-state imaging device having, in each of unit pixels, an on-chip microlens
composed of plural convex lens parts for each of photoelectric conversion elements
provided on a semiconductor chip is disclosed. A floating diffusion part and a
signal-charge read gate for taking out a signal charge from the photoelectric conversion
element are provided on a region positioned in a boundary of each convex lens part
of the on-chip microlens. A wiring for the floating diffusion part and a wiring
for the read gate are provided along the respective boundaries of the convex lens
parts of the on-chip microlens. In this device, the film thickness of the on-chip
microlens can be reduced with regard to the area of each unit pixel, thereby facilitating
the process control and enhancing the light transmission efficiency. It is also
possible to enhance the circuit wiring efficiency in each unit pixel while avoiding
any incomplete charge transfer to consequently improve the picture quality.
