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US4814844A Expired / Lapsed US ⏱️ 0.0 years remaining

Split two-phase CCD clocking gate apparatus

Assignee: United States Department of the Air Force
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Filing: 1986-12-12
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Granted: 1989-03-21
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Expires: 2006-12-12
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Abstract

Abstract A split two-phase CCD clocking gate apparatus utilizing first and second phase regions for the storage and transfer of charge and a virtual phase region which is at a constant potential and separates the first and second phase regions.

Inventors

  • 👤 Nathan Bluzer

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-10-30 06:20
CPC Classifications
H; H10; H10D; H10D44/00; H10D44/40; H10D44/45; H10D44/462; H10D44/464

Claims Analysis

Total Claims: 11
Claim 1
Independent Claim 206 words
A split two-phase CCD clocking gate apparatus comprising in combination: a substrate of P-type semiconductor material, a layer of N-type semiconductor material deposited atop said substrate, a first phase region formed in said layer of N-type semiconductor material, a virtual phase region formed in said N-type semiconductor material adjacent to and in electrical contact with said first phase region, a second phase region formed in said layer of N-type semiconductor material adjacent to and in electrical contact with said virtual phase region, a thin layer of insulating material deposited atop said layer of N-type semiconductor material covering all three regions formed in said layer of N-type semiconductor material, a first clocking gate formed on said thin layer of insulating material over said first phase region, said first clocking gate receiving a first phase clock signal, and, a second clocking gate formed on said thin layer of insulating material over said second phase region, said second clocking gate receiving a second phase clock signal, charge in the potential well in said first phase region will be transferred through said virtual phase region to the potential well in said second phase region when said first phase clock signal is repulsive and said second phase clock signal is attractive.
Claim 2
Dependent Claim 206 words
A split two-phase CCD clocking gate apparatus comprising in combination: a substrate of P-type semiconductor material, a layer of N-type semiconductor material deposited atop said substrate, a first phase region formed in said layer of N-type semiconductor material, a virtual phase region formed in said N-type semiconductor material adjacent to and in electrical contact with said first phase region, a second phase region formed in said layer of N-type semiconductor material adjacent to and in electrical contact with said virtual phase region, a thin layer of insulating material deposited atop said layer of N-type semiconductor material covering all three regions formed in said layer of N-type semiconductor material, a first clocking gate formed on said thin layer of insulating material over said first phase region, said first clocking gate receiving a first phase clock signal, and, a second clocking gate formed on said thin layer of insulating material over said second phase region, said second clocking gate receiving a second phase clock signal, charge in the potential well in said first phase region will be transferred through said virtual phase region to the potential well in said second phase region when said first phase clock signal is repulsive and said second phase clock signal is attractive.
Claim 3
Dependent Claim 35 words
A split two-phase CCD clocking gate apparatus as described in claim 1 wherein said first phase region comprises in combination a first and second doped region, adjacent to each other, with different concentrations of N-dopant.
Claim 4
Dependent Claim 36 words
A split two-phase CCD clocking gate apparatus as described in in claim 1 wherein said second phase region comprises in combination a first and second doped region, adjacent to each other, with different concentrations of N-dopant.
Claim 5
Dependent Claim 62 words
A split two-phase CCD clocking gate apparatus as described in in claim 1 wherein said virtual phase region comprises in combination a first and second implant region, said first implant region positioned atop of said second implant region, said first implant region being doped with a predetermined concentration of P-dopant, said second implant region being doped with a predetermined concentration of N-dopant.
Claim 6
Dependent Claim 29 words
A split two-phase CCD clocking gate apparatus as described in claim 1 wherein a clock signal that is repulsive is more negative than a clock signal that is attractive.
Claim 7
Dependent Claim 34 words
A split two-phase CCD clocking gate apparatus as described in claim 2 wherein the concentration of N-dopant of said first doped region is less than the concentration of N-dopant of said second doped region.
Claim 8
Dependent Claim 34 words
A split two-phase CCD clocking gate apparatus as described in claim 3 wherein the concentration of N-dopant of said first doped region is less than the concentration of N-dopant of said second doped region.
Claim 9
Dependent Claim 22 words
A split two-phase CCD clocking gate apparatus as described in claim 4 wherein said virtual phase region is at a constant potential.
Claim 10
Dependent Claim 25 words
A split two-phase CCD clocking gate apparatus as described in claim 4 wherein said virtual phase region has a predetermined width that is very narrow.
Claim 11
Dependent Claim 20 words
A split two-phase CCD clocking gate apparatus as described in claim 9 wherein said predetermined width is approximately 1 micron.

References Cited (Backward Citations)

US3796933A Cited
US4229752A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1992-03-20 1992-09-19 1993-03-21 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1996-03-20 1996-09-19 1997-03-21 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 2000-03-20 2000-09-19 2001-03-21 $7700.00 Window Closed / Lapsed

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