GRAPHENE LAYERS FOR IDENTIFICATION OF PRODUCTS

Damon B. Farmer

Patent

Atlas literature

Patent

US 9,568,421

GRAPHENE LAYERS FOR IDENTIFICATION OF PRODUCTS

Damon B. Farmer

Drawings

Patent drawings and their descriptions. Click a drawing to enlarge it.

FIG. 1

process tool top view

FIG. 1 1 C illustrates a top-view of the multilayered security device, according to various embodiments. [0028] While the invention is amenable to various …

FIG. 2

FIG. 2 illustrates a ﬂowchart of a method for verifying the authenticity of the multilayered security device, according to various embodiments. [0013]

FIG. 3

FIG. 3 illustrates a block diagram of a system for verifying the authenticity of a multilayered security device, according to various embodiments. [0014]

FIG. 4

FIG. 4B illustrates two plots of the contrast between one layer and two layers of graphene, according to various embodiments. [0016]

FIG. 5

performance graph

FIG. 5 illustrates an absorption graph of graphene for diﬀerent pattern spacing in a multilayered security device, according to various embodiments. YO …

FIG. 6

performance graph

FIG. 6 illustrates an absorption graph of graphene for a 0.25 mm pattern spacing with 140 nm coating of PMMA, according to various embodiments. [0018]

FIG. 7

FIG. 7B illustrates an image of a multilayered security device using a transparent substrate and transmitted light, according to various embodiments. [0020]

FIG. 8

FIG. 8 illustrates an absorption graph for a front lighting and a back lighting of a multilayered security device using a transparent substrate, according to …

FIG. 9

FIG. 9B illustrates an absorption graph with 1O MP resolution for 0.125mm spacing of graphene on a multilayered security device, according to various …

FIG. 10

process tool top view

FIG. 10 B illustrates a top-view of a multilayered security device applied to a chipset product, according to various embodiments. [0025]

Claims

Claims define the patent's legal scope. Independent claims stand alone; dependent claims (nested) narrow them. Click a claim to expand its dependents.

1 independent · 8 dependent

1
IndependentCOLED substrateembedded RF coilmultilayered security device
A method of verifying a product using a multilayered security device, comprising: applying, by an antenna of a capture device, a low-power radio frequency (RF) signal to a security device attached to the product, wherein the security device includes an Organic Light Emitting Diode (OLED) substrate with an embedded RF coil, the embedded RF coil causing the OLED substrate to emit light in response to the applied low-power RF signal, the security device further comprising a graphene sheet made of a monolayer of covalently bonded carbon atoms, the graphene sheet preventing light emitted from the OLED substrate to form a contrasting pattern of emitted light; receiving, by a camera of the capture device and in response to the applied low-power RF signal, a captured pattern from the contrasting pattern of emitted light of the security device determining the captured pattern matches an expected pattern; and verifying the authenticity of the product in response to the captured pattern matching the expected pattern.
1. 2
  Dependent← claim 1
  The method of claim 1, wherein the capture device is a cellphone.
2. 3
  Dependent← claim 1C
  The method of claim 1, wherein the security device further comprises a second graphene sheet made of a monolayer of covalently bonded carbon atoms, and wherein the contrasting pattern of emitted light is also formed from the second graphene sheet.
3. 4
  Dependent← claim 1protective coating layer
  The method of claim 1, wherein the security device further comprises a protective coating layer over the OLED substrate and the graphene sheet. YO R₉₂₀₁₄₀₃₁₉US₂ Page 27 of 29
4. 7
  Dependent← claim 1SiO₂
  The method of claim 1, wherein the OLED substrate of the security device may be patterned with an embedded silicon dioxide material to increase the complexity of the contrasting pattern of emitted light.
5. 8
  Dependent← claim 1
  The method of claim 1, wherein the expected pattern is stored on the cellphone, and wherein the determining the captured pattern matches an expected pattern is comparing by the cellphone.
6. 9
  Dependent← claim 1
  The method of claim 1, wherein the expected pattern is stored on a node of a cloud computing system, and wherein the determining the captured pattern matches an expected pattern is performed by the node. YO R₉₂₀₁₄₀₃₁₉US₂ Page 28 of 29

Device structures

Layer stacks claimed or described, ordered top of device to substrate.

multilayered security device

protective coating layerprotective coating

Cgraphene patterning/blocking layer

embedded RF coilRF coil embedded in substrate

OLED substratelight-emitting substrate

Materials

Materials described outside the worked examples.

graphene sheet

Light-Blocking/Patterning Layer In Security Device

Additional Light-Blocking/Patterning Layer In Security DeviceSecurity Device Patterning Layer Grown By CVD

OLED substrate

Process steps

Additional fabrication and treatment steps described in the patent.

Cvd Growth

Step 1

Temperature

1000°C

Ambient

H2 or CH4

Process details

notes:roll-to-roll processing option; also possible on silicon wafer with specific oxide thickness

layers:

Characterization

Measurements and analyses referenced in the patent, with their drawing references.

optical absorption

Optical Absorption

FIG. 4B illustrates two plots of the contrast between one layer and two layers of graphene, according to various embodiments. [0016]

Figure references

FIG. 4

graphenegraphene

Reported properties

Performance values and ranges asserted in the specification or claims.

Property	Value	Material
Thickness	90–300 nm	—
Thickness

Why these are connected

Related documents with shared materials, methods, properties, or citations.

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