Patent
US 8,823,259Graphene Shield Enhanced Photocathodes and Methods for Making the Same
Nathan Andrew Moody
Los Alamos National Security, LLC·US
Copyright © 2026 Matter42. All rights reserved.
Patent
Atlas literature
Patent
US 8,823,259Patent drawings and their descriptions. Click a drawing to enlarge it.
Figure 1 (A) is a SEM image of graphene on copper foil.
Figure 2 is a side and top view of a photosensitive film on a cathode substrate.
Figure 3 is a side view of an embodiment of the photocathode.
Figure 4A is an embodiment of the graphene sheet grown on a graphene substrate prior to etching of the graphene substrate.
Figure 4B is an embodiment of the graphene sheet grown on a graphene substrate after etching of the graphene substrate to form a graphene window.
Figure 5A is a side view of an embodiment of the photocathode wherein the graphene shield membrane is mounted via a hinge.
Figure 5B is a top view of the embodiment of
Figure 6 is a perspective view of an embodiment of the photocathode with a fixed-positioned graphene shield membrane and movable cathode substrate and film.
Figure 7 is a schematic of an embodiment of the photocathode.
Claims define the patent's legal scope. Independent claims stand alone; dependent claims (nested) narrow them. Click a claim to expand its dependents.
/05 2014 16:45 FAX 5056654424 LANLLC EE002/006 RECEIVED CENTRAL FAX CENTER Serial No.: 13/886,517 mtorey Docket No.: S-121,999 LIST ING OF CLAIMS Please amend claims 3, 9, 10, and 12 and cancel claims 1, 4, and 7 as shown below. The current listing of claims will replace all prior versions thereof.
The apparatus of claim 12 wherein the graphe n e shield membrane further is-connected to the first surface of the cathode substrate and forming a hermetic seal between the first surface of the cathode sub st rate and the graphe n e shield membrane.
A photocathode comprising: Page 4 of 6 PAGE 4 16* RCVD AT 5 1121 2014 6:18:30 PM [Eastern Daylight Time] * SVR:W-PTO FAX- 002 1 17 * DNIS:273 8 300 * CSID:5056654424 * DURATION (mm-ss):02-1 5 12/05 2014 16:46 FAX 5056654424 LANLLC 0 005/006 Serial No.: 1 3/886,517 Atto rn ey Docket No.: S- 1 21,999 a photosensitive film on a cathode substrate; a graphene shield membrane positioned to form a sealed chamber between the photosensitive film and the graphene shield membrane and capable of shielding the photosensitive film from reactive gas species.
The photocathode of claim 14 wherein the graphe n e shield membrane comprises a graphene composite having a graphene sheet with a first and a second surface and a scaffolding formed on the first and/or the second surface of the graphene sheet, the scaffolding capable of supporting the graphene sheet sufficient to form a vacuum sealed chamber between the graphene shield membrane and the photosensitive film.
The photocathode of claim x5 further comprising an adhesive formed on the scaffolding.
The photocathode of claim 1 6 wherein the graphene shield membrane further comprises 2 to 100 graphene sheets.
Layer stacks claimed or described, ordered top of device to substrate.
electron emitting device with graphene shield and hermetic seal
graphene shield enhanced photocathode
Materials described outside the worked examples.
graphene shield membrane
photosensitive film
Measurements and analyses referenced in the patent, with their drawing references.
Performance values and ranges asserted in the specification or claims.
| Property | Value | Material |
|---|---|---|
Thickness | 0–1000 nm | — |
Temperature |
Patent
Atlas literature
Patent
US 8,823,259Patent drawings and their descriptions. Click a drawing to enlarge it.
Figure 1 (A) is a SEM image of graphene on copper foil.
Figure 2 is a side and top view of a photosensitive film on a cathode substrate.
Figure 3 is a side view of an embodiment of the photocathode.
Figure 4A is an embodiment of the graphene sheet grown on a graphene substrate prior to etching of the graphene substrate.
Figure 4B is an embodiment of the graphene sheet grown on a graphene substrate after etching of the graphene substrate to form a graphene window.
Figure 5A is a side view of an embodiment of the photocathode wherein the graphene shield membrane is mounted via a hinge.
Figure 5B is a top view of the embodiment of
Figure 6 is a perspective view of an embodiment of the photocathode with a fixed-positioned graphene shield membrane and movable cathode substrate and film.
Figure 7 is a schematic of an embodiment of the photocathode.
Claims define the patent's legal scope. Independent claims stand alone; dependent claims (nested) narrow them. Click a claim to expand its dependents.
/05 2014 16:45 FAX 5056654424 LANLLC EE002/006 RECEIVED CENTRAL FAX CENTER Serial No.: 13/886,517 mtorey Docket No.: S-121,999 LIST ING OF CLAIMS Please amend claims 3, 9, 10, and 12 and cancel claims 1, 4, and 7 as shown below. The current listing of claims will replace all prior versions thereof.
The apparatus of claim 12 wherein the graphe n e shield membrane further is-connected to the first surface of the cathode substrate and forming a hermetic seal between the first surface of the cathode sub st rate and the graphe n e shield membrane.
A photocathode comprising: Page 4 of 6 PAGE 4 16* RCVD AT 5 1121 2014 6:18:30 PM [Eastern Daylight Time] * SVR:W-PTO FAX- 002 1 17 * DNIS:273 8 300 * CSID:5056654424 * DURATION (mm-ss):02-1 5 12/05 2014 16:46 FAX 5056654424 LANLLC 0 005/006 Serial No.: 1 3/886,517 Atto rn ey Docket No.: S- 1 21,999 a photosensitive film on a cathode substrate; a graphene shield membrane positioned to form a sealed chamber between the photosensitive film and the graphene shield membrane and capable of shielding the photosensitive film from reactive gas species.
The photocathode of claim 14 wherein the graphe n e shield membrane comprises a graphene composite having a graphene sheet with a first and a second surface and a scaffolding formed on the first and/or the second surface of the graphene sheet, the scaffolding capable of supporting the graphene sheet sufficient to form a vacuum sealed chamber between the graphene shield membrane and the photosensitive film.
The photocathode of claim x5 further comprising an adhesive formed on the scaffolding.
The photocathode of claim 1 6 wherein the graphene shield membrane further comprises 2 to 100 graphene sheets.
Layer stacks claimed or described, ordered top of device to substrate.
electron emitting device with graphene shield and hermetic seal
graphene shield enhanced photocathode
Materials described outside the worked examples.
graphene shield membrane
photosensitive film
Measurements and analyses referenced in the patent, with their drawing references.
Performance values and ranges asserted in the specification or claims.
| Property | Value | Material |
|---|---|---|
Thickness | 0–1000 nm | — |
Temperature |
Patent
Atlas literature
Patent
US 8,823,259Patent drawings and their descriptions. Click a drawing to enlarge it.
Figure 1 (A) is a SEM image of graphene on copper foil.
Figure 2 is a side and top view of a photosensitive film on a cathode substrate.
Figure 3 is a side view of an embodiment of the photocathode.
Figure 4A is an embodiment of the graphene sheet grown on a graphene substrate prior to etching of the graphene substrate.
Figure 4B is an embodiment of the graphene sheet grown on a graphene substrate after etching of the graphene substrate to form a graphene window.
Figure 5A is a side view of an embodiment of the photocathode wherein the graphene shield membrane is mounted via a hinge.
Figure 5B is a top view of the embodiment of
Figure 6 is a perspective view of an embodiment of the photocathode with a fixed-positioned graphene shield membrane and movable cathode substrate and film.
Figure 7 is a schematic of an embodiment of the photocathode.
Claims define the patent's legal scope. Independent claims stand alone; dependent claims (nested) narrow them. Click a claim to expand its dependents.
/05 2014 16:45 FAX 5056654424 LANLLC EE002/006 RECEIVED CENTRAL FAX CENTER Serial No.: 13/886,517 mtorey Docket No.: S-121,999 LIST ING OF CLAIMS Please amend claims 3, 9, 10, and 12 and cancel claims 1, 4, and 7 as shown below. The current listing of claims will replace all prior versions thereof.
The apparatus of claim 12 wherein the graphe n e shield membrane further is-connected to the first surface of the cathode substrate and forming a hermetic seal between the first surface of the cathode sub st rate and the graphe n e shield membrane.
A photocathode comprising: Page 4 of 6 PAGE 4 16* RCVD AT 5 1121 2014 6:18:30 PM [Eastern Daylight Time] * SVR:W-PTO FAX- 002 1 17 * DNIS:273 8 300 * CSID:5056654424 * DURATION (mm-ss):02-1 5 12/05 2014 16:46 FAX 5056654424 LANLLC 0 005/006 Serial No.: 1 3/886,517 Atto rn ey Docket No.: S- 1 21,999 a photosensitive film on a cathode substrate; a graphene shield membrane positioned to form a sealed chamber between the photosensitive film and the graphene shield membrane and capable of shielding the photosensitive film from reactive gas species.
The photocathode of claim 14 wherein the graphe n e shield membrane comprises a graphene composite having a graphene sheet with a first and a second surface and a scaffolding formed on the first and/or the second surface of the graphene sheet, the scaffolding capable of supporting the graphene sheet sufficient to form a vacuum sealed chamber between the graphene shield membrane and the photosensitive film.
The photocathode of claim x5 further comprising an adhesive formed on the scaffolding.
The photocathode of claim 1 6 wherein the graphene shield membrane further comprises 2 to 100 graphene sheets.
Layer stacks claimed or described, ordered top of device to substrate.
electron emitting device with graphene shield and hermetic seal
graphene shield enhanced photocathode
Materials described outside the worked examples.
graphene shield membrane
photosensitive film
Measurements and analyses referenced in the patent, with their drawing references.
Performance values and ranges asserted in the specification or claims.
| Property | Value | Material |
|---|---|---|
Thickness | 0–1000 nm | — |
Temperature |
Patent
Atlas literature
Patent
US 8,823,259Patent drawings and their descriptions. Click a drawing to enlarge it.
Figure 1 (A) is a SEM image of graphene on copper foil.
Figure 2 is a side and top view of a photosensitive film on a cathode substrate.
Figure 3 is a side view of an embodiment of the photocathode.
Figure 4A is an embodiment of the graphene sheet grown on a graphene substrate prior to etching of the graphene substrate.
Figure 4B is an embodiment of the graphene sheet grown on a graphene substrate after etching of the graphene substrate to form a graphene window.
Figure 5A is a side view of an embodiment of the photocathode wherein the graphene shield membrane is mounted via a hinge.
Figure 5B is a top view of the embodiment of
Figure 6 is a perspective view of an embodiment of the photocathode with a fixed-positioned graphene shield membrane and movable cathode substrate and film.
Figure 7 is a schematic of an embodiment of the photocathode.
Claims define the patent's legal scope. Independent claims stand alone; dependent claims (nested) narrow them. Click a claim to expand its dependents.
/05 2014 16:45 FAX 5056654424 LANLLC EE002/006 RECEIVED CENTRAL FAX CENTER Serial No.: 13/886,517 mtorey Docket No.: S-121,999 LIST ING OF CLAIMS Please amend claims 3, 9, 10, and 12 and cancel claims 1, 4, and 7 as shown below. The current listing of claims will replace all prior versions thereof.
The apparatus of claim 12 wherein the graphe n e shield membrane further is-connected to the first surface of the cathode substrate and forming a hermetic seal between the first surface of the cathode sub st rate and the graphe n e shield membrane.
A photocathode comprising: Page 4 of 6 PAGE 4 16* RCVD AT 5 1121 2014 6:18:30 PM [Eastern Daylight Time] * SVR:W-PTO FAX- 002 1 17 * DNIS:273 8 300 * CSID:5056654424 * DURATION (mm-ss):02-1 5 12/05 2014 16:46 FAX 5056654424 LANLLC 0 005/006 Serial No.: 1 3/886,517 Atto rn ey Docket No.: S- 1 21,999 a photosensitive film on a cathode substrate; a graphene shield membrane positioned to form a sealed chamber between the photosensitive film and the graphene shield membrane and capable of shielding the photosensitive film from reactive gas species.
The photocathode of claim 14 wherein the graphe n e shield membrane comprises a graphene composite having a graphene sheet with a first and a second surface and a scaffolding formed on the first and/or the second surface of the graphene sheet, the scaffolding capable of supporting the graphene sheet sufficient to form a vacuum sealed chamber between the graphene shield membrane and the photosensitive film.
The photocathode of claim x5 further comprising an adhesive formed on the scaffolding.
The photocathode of claim 1 6 wherein the graphene shield membrane further comprises 2 to 100 graphene sheets.
Layer stacks claimed or described, ordered top of device to substrate.
electron emitting device with graphene shield and hermetic seal
graphene shield enhanced photocathode
Materials described outside the worked examples.
graphene shield membrane
photosensitive film
Measurements and analyses referenced in the patent, with their drawing references.
Performance values and ranges asserted in the specification or claims.
| Property | Value | Material |
|---|---|---|
Thickness | 0–1000 nm | — |
Temperature |
scaffolding
adhesive
polyimide
molybdenum
Mo
metal foil
alkali-oxide compound
CsBr
| 10–50 °C |
| — |
Thickness | 5–10 mm | — |
Temperature | ≤ 250 °C | — |
scaffolding
adhesive
polyimide
molybdenum
Mo
metal foil
alkali-oxide compound
CsBr
| 10–50 °C |
| — |
Thickness | 5–10 mm | — |
Temperature | ≤ 250 °C | — |
scaffolding
adhesive
polyimide
molybdenum
Mo
metal foil
alkali-oxide compound
CsBr
| 10–50 °C |
| — |
Thickness | 5–10 mm | — |
Temperature | ≤ 250 °C | — |
scaffolding
adhesive
polyimide
molybdenum
Mo
metal foil
alkali-oxide compound
CsBr
| 10–50 °C |
| — |
Thickness | 5–10 mm | — |
Temperature | ≤ 250 °C | — |