Source: http://www.google.com/patents/US7723766?ie=ISO-8859-1&dq=6,757,710
Timestamp: 2014-10-23 04:01:22
Document Index: 427100391

Matched Legal Cases: ['Application No. 2005101287688', 'Application No. 2005', 'application No. 03014645', 'application No. 03014645', 'application No. 2005', 'Application No. 2005', 'Application No. 2005']

Patent US7723766 - Solid-state image sensing device and camera system using the same - Google PatentsSearch Images Maps Play YouTube News Gmail Drive More »Sign inAdvanced Patent SearchPatentsA solid-state image sensing device includes a plurality of pixels. Each pixel has a photodiode, a first transistor, and a second transistor. The photodiode is constituted by a first-conductivity-type semiconductor region and a second-conductivity-type semiconductor region. The first and second conductivity...http://www.google.com/patents/US7723766?utm_source=gb-gplus-sharePatent US7723766 - Solid-state image sensing device and camera system using the sameAdvanced Patent SearchPublication numberUS7723766 B2Publication typeGrantApplication numberUS 12/048,886Publication dateMay 25, 2010Filing dateMar 14, 2008Priority dateJun 27, 2002Fee statusPaidAlso published asCN1266773C, CN1471311A, EP1376701A2, EP1376701A3, EP1376701B1, EP2139039A2, EP2139039A3, EP2270863A2, EP2270863A3, EP2270864A2, EP2270864A3, EP2339631A2, EP2339631A3, US6885047, US7423305, US7705381, US8436406, US8580595, US20040000681, US20050035382, US20060124977, US20080164500, US20080258190, US20100187581, US20130203208Publication number048886, 12048886, US 7723766 B2, US 7723766B2, US-B2-7723766, US7723766 B2, US7723766B2InventorsMahito Shinohara, Shunsuke InoueOriginal AssigneeCanon Kabushiki KaishaExport CitationBiBTeX, EndNote, RefManPatent Citations (50), Non-Patent Citations (7), Referenced by (3), Classifications (27), Legal Events (1) External Links: USPTO, USPTO Assignment, EspacenetSolid-state image sensing device and camera system using the sameUS 7723766 B2Abstract A solid-state image sensing device includes a plurality of pixels. Each pixel has a photodiode, a first transistor, and a second transistor. The photodiode is constituted by a first-conductivity-type semiconductor region and a second-conductivity-type semiconductor region. The first and second conductivity types are opposite to each other. The first transistor has a first-conductivity-type drain region formed in the second-conductivity-type semiconductor region to transfer signal charge to the drain region. The second transistor has a source region and a drain region which are formed in the second-conductivity-type semiconductor region and which have the first conductivity type. At least one second-conductivity-type potential barrier is provided under the drain region of the first transistor and the source region and/or the drain region of the second transistor.
a second semiconductor region of a second conductivity type opposite to the first conductivity type, the second semiconductor region constituting a PN junction with the first semiconductor region and functioning as a part of a photodiode; and
an element isolation region having an insulating film in a trench;
wherein the first semiconductor region is disposed at a depth deeper than that of the second semiconductor region with respect to a light receiving surface;
a third semiconductor region of the first conductivity type disposed on a side wall of the element isolation region;
a fourth semiconductor region of the first conductivity type disposed under the element isolation region;
a fifth semiconductor region of the second conductivity type having an impurity concentration higher than that of the second semiconductor region and disposed at a depth shallower than that of the second semiconductor region with respect to the light receiving surface, said fifth semiconductor region functioning as an accumulation part of the photodiode;
a transistor of the second conductivity type in which the fifth semiconductor region functions as a source region or a drain region,
wherein the fourth semiconductor region is disposed continuously to the first semiconductor region and electrically isolates an adjacent photodiode,
wherein the fourth semiconductor region comprises a plurality of semiconductor regions stacked in the direction of depth; and
a sixth semiconductor region of the first conductivity type disposed within the second semiconductor region directly under a gate electrode of the transistor in the direction of depth apart from a channel formed under the gate electrode, and
wherein at least a portion of the fifth semiconductor region extends directly under a gate electrode of the transistor in the direction of depth of the device.
2. A solid state image sensing device according to claim 1, wherein the sixth semiconductor region comprises a plurality of semiconductor regions stacked in the direction of depth.
3. A camera system comprising the solid state image sensing device according to claim 1.
4. A solid state image sensing device according to claim 1, wherein the fourth semiconductor region, the sixth semiconductor region and the first semiconductor region are formed continuously.
5. A solid state image sensing device according to claim 1, wherein the third semiconductor region and the fourth semiconductor region are continuously formed.
6. A solid state image sensing device having a plurality of pixels, each pixel comprising:
a second semiconductor region of a second conductivity type opposite to the first conductivity type, the second semiconductor region constituting a PN junction with the first semiconductor region and functioning as a part of a photodiode;
an element isolation region having Shallow Trench Isolation forming an insulating film,
a transistor of the second conductivity type in which the fifth semiconductor region functions as a source region or a drain region, and
wherein at least a portion of the fifth semiconductor region extends directly under a gate electrode of the transistor in the direction of depth of the device
wherein the fourth semiconductor region is a potential barrier.
7. A solid state image sensing device according to claim 6, wherein the sixth semiconductor region comprises a plurality of semiconductor regions stacked in the direction of depth.
8. A camera system comprising the solid state image sensing device according to claim 6.
9. A solid state image sensing device according to claim 6, wherein the fourth semiconductor region, the sixth semiconductor region and the first semiconductor region are formed continuously.
10. A solid state image sensing device according to claim 6, wherein the third semiconductor region and the fourth semiconductor region are continuously formed.
This is a divisional of U.S. patent application Ser. No. 11/316,868, filed Dec. 27, 2005, now pending, which is a divisional of U.S. patent application Ser. No. 10/944,941, filed Sep. 21, 2004, now abandoned, which is a continuation of U.S. patent application Ser. No. 10/463,604, filed Jun. 18, 2003, now U.S. Pat. No. 6,885,047, issued on Apr. 26, 2005.
FIG. 16 is a schematic sectional view of the solid-state image sensing device shown in FIG. 14. This sectional view shows a combination of portions corresponding to the photodiode 1 and the transfer MOS transfer 2 shown in FIG. 14. Reference numeral 11 represents an n-type silicon substrate, 12 is a p well, 13 a is a gate oxide film of the transfer MOS transistor 2, 13 b is a thin oxide film provided on a light-receiving portion, 14 is the gate electrode of the transfer MOS transistor 2, and 15 is an n-type cathode of the photodiode 1. Reference numeral 16 represents a p-type surface region for providing a photodiode-buried structure, and 17 is a LOCOS oxide film for element isolation. Reference numeral 18 is a heavily-doped n-type region that forms a floating diffusion region and also acts as the drain region of the transfer MOS transistor 2. Reference numeral 19 is a silicon oxide film for providing insulation between the gate electrode and a first metal layer 21. Reference numeral 20 is a contact plug, 22 is an interlayer insulting film for providing insulation between the first metal layer 21 and a second metal layer 23, 24 is an interlayer insulating film for providing insulation between the second metal layer 23 and a third metal layer 25, and 26 is a passivation film. For a color photoelectrical conversion device, a color filter layer (not shown) is formed at the upper layer of the passivation film 26 and a micro-lens (not shown) is further formed thereon to improve the sensitivity. Incident light through the surface enters the photodiode through an aperture where the third metal layer 25 is not provided. The light is absorbed by the n-type cathode 15 of the photodiode or the p well layer 12, so that electron-hole pairs are produced. Of these pairs, electrons are stored in an n-type cathode region.
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Application No. 2005-273717.7Japanese Office Action issued Dec. 16, 2008, in Japanese Application No. 2005-119658.Referenced byCiting PatentFiling datePublication dateApplicantTitleUS8779544Jan 26, 2010Jul 15, 2014Canon Kabushiki KaishaPhotoelectric conversion apparatus and imaging system having revision with multiple impurity densitiesUS8785991 *May 28, 2009Jul 22, 2014Sony CorporationSolid state imaging device, method for producing the same, and electronic apparatusUS20100002108 *May 28, 2009Jan 7, 2010Sony CorporationSolid state imaging device, method for producing the same, and electronic apparatus* Cited by examinerClassifications U.S. Classification257/292, 257/291, 257/258, 257/234, 257/233, 257/461, 257/290, 257/462International ClassificationH04N5/335, H04N5/369, H04N5/374, H01L27/146, H01L31/062Cooperative ClassificationH01L27/14603, H01L27/14656, H01L27/14689, H01L27/14609, H01L27/14643, H01L27/14632, H01L27/14654, H01L27/1463European ClassificationH01L27/146A12, H01L27/146F4, H01L27/146A14, H01L27/146F4O, H01L27/146A4, H01L27/146FLegal EventsDateCodeEventDescriptionOct 30, 2013FPAYFee paymentYear of fee payment: 4RotateOriginal ImageGoogle Home - Sitemap - USPTO Bulk Downloads - Privacy Policy - Terms of Service - About Google Patents - Send FeedbackData provided by IFI CLAIMS Patent Services©2012 Google