Patent ID: 8482646

Claim:
An image sensing device comprising: a pixel array in which pixels are arranged to form a plurality of rows and a plurality of columns; and a peripheral circuit including a row selecting circuit which selects a row in the pixel array, a column selecting circuit which selects a column in the pixel array, and a readout circuit which reads out a signal of the column selected by the column selecting circuit in the pixel array, wherein each pixel includes a photodiode, a floating diffusion, a transfer PMOS transistor which transfers a hole stored in a storage region of the photodiode to the floating diffusion, an amplifier PMOS transistor which amplifies a signal that appears in the floating diffusion, and a reset PMOS transistor which resets a potential of the floating diffusion, the amplifier PMOS transistor has a gate which is formed by an n-type conductive pattern, and is isolated by a first element isolation region and an n-type impurity region which covers at least a lower portion of the first element isolation region, and each PMOS transistor included in the column selecting circuit has a gate which is formed by a p-type conductive pattern and is isolated by a second element isolation region, and an n-type impurity concentration in a region adjacent to a lower portion of the second element isolation region is lower than an n-type impurity concentration in the n-type impurity region.