Patent ID: 7285438

Claim:
A method for manufacturing a solid-state imaging device having a plurality of optical sensors which are adjacent to each other and electrodes which are provided under the optical sensors and which control signal charge generated by the optical sensors, the signal charge being generated when the optical sensors receive light, the method comprising the steps of: forming trenches which separate the optical sensors from one another in a first surface of a single-crystal silicon substrate; forming device-separating regions by filling the trenches with a device-separating material; forming the electrodes on the first surface of the silicon substrate; forming a buffer layer comprising an insulating material on the electrodes; bonding a support substrate to the buffer layer; polishing the silicon substrate until end portions of the device-separating regions at the bottom of the trenches appear in a second surface of the silicon substrate, the second surface being opposite to the first surface; and forming the optical sensors in the silicon substrate by implanting impurity ions into the polished silicon substrate through the second surface thereof.