Image pickup element performing image detection of high resolution and high image quality and image pickup apparatus including the same
View Patent ↗In a pixel part, in a first active region, a photodiode and a transferring transistor are formed. In a second active region, a resetting transistor is formed. In a pixel part, in a first active region, a photodiode and a transferring transistor are formed. In a second active region, an amplifying transistor is formed. The first and second active regions are respectively the same in shape in image pixel parts. The resetting transistor and the amplifying transistor are shared by the pixel parts.
1. An image pickup element, comprising:
on a same substrate, first and second pixel parts each having first and second active regions used for forming constituting components, said first and second active regions being respectively same in shape in said first and second pixel parts, wherein
said first pixel part includes
a first photoelectric conversion element formed at said first active region,
a first transferring transistor formed at said first active region for transmitting charges photoelectrically converted by said first photoelectric conversion element to a floating diffusion region, and
a resetting transistor formed at said second active region for resetting said floating diffusion region, wherein
said second pixel part includes
a second photoelectric conversion element formed at said first active region,
a second transferring transistor formed at said first active region for transmitting charges photoelectrically converted by said second photoelectric conversion element to said floating diffusion region, and
an amplifying transistor formed at said second active region for amplifying a signal corresponding to said charges in said floating diffusion region and outputting the amplified signal, and wherein
said floating diffusion region is shared by said first and second pixel parts.
2. The image pickup element according to claim 1 , wherein
gate regions of said first and second transferring transistors in respective said first active regions are formed by polysilicon of a same shape, and wherein
gate regions of said resetting transistor and said amplifying transistor in respective said second active regions are formed by polysilicon of a same shape.
3. An image pickup apparatus, comprising:
on a same substrate, a plurality of pixel parts arranged in rows and columns and each having first and second active regions used for forming constituting components, said first and second active regions being respectively same in shape among said plurality of pixel parts; and
a control part for controlling said plurality of pixel parts, wherein
said plurality of pixel parts are divided into sets by two pixel parts adjacent to each other in a first direction, wherein
one pixel part of each said set includes
a first photoelectric conversion element formed at said first active region,
a first transferring transistor formed at said first active region for transmitting charges photoelectrically converted by said first photoelectric conversion element to a floating diffusion region, and
a resetting transistor formed at said second active region for resetting said floating diffusion region, wherein
the other pixel part of each said set includes
a second photoelectric conversion element formed at said first active region,
a second transferring transistor formed at said first active region for transmitting charges photoelectrically converted by said second photoelectric conversion element to said floating diffusion region, and
an amplifying transistor formed at said second active region for amplifying a signal corresponding to said charges in said floating diffusion region and outputting the amplified signal, wherein
said floating diffusion region is shared by said one pixel part and said other pixel part of each said set, and wherein
adjacent sets are arranged differently relative to each other in a second direction.
4. The image pickup apparatus according to claim 3 , further comprising
a polysilicon formation region used for an electrical interconnection in said first direction, wherein
in two pixel parts forming each said set, said polysilicon formation region has a first formation region provided as a part of said floating diffusion shared by pixel parts of each said set and a second formation region for forming polysilicon as a dummy in a remainder of said polysilicon formation region, and wherein
polysilicon formed in said first formation region and polysilicon formed in said second formation region are electrically separated from each other.
5. The image pickup apparatus according to claim 3 , further comprising
color filters of a plurality of types respectively arranged on said pixel parts according to a prescribed pattern.
6. The image pickup apparatus according to claim 5 , wherein
a green color filter being one of said color filters of a plurality of types is arranged in a third direction being different from said first and second directions.
7. The image pickup apparatus according to claim 3 , further comprising
a metal interconnection for transmitting a signal for controlling each said pixel part, wherein
in each said pixel part, said first active region is divided into a first region forming one of first and second photoelectric conversion elements and a second region forming one of first and second transferring transistors, wherein
said second region of said first active region as well as said second active region are provided between first regions of two adjacent first active regions, and wherein
said metal interconnection is arranged in a second direction and on said second region of said first active region and on said second active region to be electrically connected to at least one of said second region and said second active region.
8. An image pickup element, comprising:
on a same substrate, first and second pixel parts each having first and second active regions used for forming constituting components, said first active region being respectively same in shape in said first and second pixel parts, wherein
said first pixel part includes
a first photoelectric conversion element formed at said first active region,
a first transferring transistor formed at said first active region for transmitting charges photoelectrically converted by said first photoelectric conversion element to a floating diffusion region, and
a resetting transistor formed at said second active region for resetting said floating diffusion region, wherein
said second pixel part includes
a second photoelectric conversion element formed at said first active region,
a second transferring transistor formed at said first active region for transmitting charges photoelectrically converted by said second photoelectric conversion element to said floating diffusion region, and
an amplifying transistor formed at said second active region for amplifying a signal corresponding to said charges in said floating diffusion region and outputting the amplified signal, and wherein
said floating diffusion region is shared by said first and second pixel parts.
9. The image pickup apparatus according to claim 8 , wherein
gate regions of said first and second transferring transistors in respective said first active regions are formed by polysilicon of a same shape.
10. An image pickup element, comprising:
on a same substrate, first and second pixel parts each having first and second active regions used for forming constituting components, wherein
said first pixel part includes
a first photoelectric conversion element formed at said first active region,
a first transferring transistor formed at said first active region for transmitting charges photoelectrically converted by said first photoelectric conversion element to a floating diffusion region, and
a resetting transistor formed at said second active region for resetting said floating diffusion region, wherein
said second pixel part includes
a second photoelectric conversion element formed at said first active region,
a second transferring transistor formed at said first active region for transmitting charges photoelectrically converted by said second photoelectric conversion element to said floating diffusion region, and
an amplifying transistor formed at said second active region for amplifying a signal corresponding to said charges in said floating diffusion region and outputting the amplified signal, and wherein
said floating diffusion region is shared by said first and second pixel parts.
11. An image pickup apparatus, comprising:
on a same substrate, a plurality of pixel parts arranged in rows and columns and each having first and second active regions used for forming constituting components; and
a control part for controlling said plurality of pixel parts, wherein
said plurality of pixel parts are divided into sets by two pixel parts adjacent to each other in a first direction, wherein
one pixel part of each said set includes
a first photoelectric conversion element formed at said first active region,
a first transferring transistor formed at said first active region for transmitting charges photoelectrically converted by said first photoelectric conversion element to a floating diffusion region, and
a resetting transistor formed at said second active region for resetting said floating diffusion region, wherein
the other pixel part of each said set includes
a second photoelectric conversion element formed at said first active region,
a second transferring transistor formed at said first active region for transmitting charges photoelectrically converted by said second photoelectric conversion element to said floating diffusion region, and
an amplifying transistor formed at said second active region for amplifying a signal corresponding to said charges in said floating diffusion region and outputting the amplified signal, wherein
said floating diffusion region is shared by said one pixel part and said other pixel part of each said set, and wherein
adjacent sets are arranged differently relative to each other in a second direction.