Patent US4119745A successfully refreshed from Google Patents.
US4119745A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Deposition of electroluminescent material through superimposed dual masks
Assignee: Phosphor Products Co Ltd
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Filing: 1976-12-22
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Granted: 1978-10-10
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Expires: 1996-12-22
Abstract
Abstract A display device includes a layer of electroluminescent material which is capable of conducting electric current. The electroluminescent material is sandwiched between a pair of electrodes to which a voltage is to be applied to excite the electroluminescent material to luminescence. The display device is manufactured by disposing on an assembly comprising a substrate with one of the said electrodes thereon, two masks in which are formed aligned apertures defining a region in which the electroluminescent material is to be provided. The electroluminescent material is disposed in the apertures, and, after that material has solidified one of the masks is removed, the other of the electrodes then being formed on the exposed surface of the electroluminescent material and within slots in the remaining mask and the mask is removed.
Inventors
- 👤 Peter John Fennemore Smith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 06:11
CPC Classifications
H; H05; H05B; H05B33/00; H05B33/10
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
165 words
A method of manufacturing a display device having a layer of electroluminescent material which is disposed between a pair of electrodes to which a voltage is to be applied to excite the electroluminescent material to luminescence, comprising the steps of disposing on an assembly having a substrate with one of the said electrodes thereon, first and second masks with the masks overlying one another, the first mask being disposed nearest to the said assembly and having formed therein an aperture defining a region in which the said electroluminescent material is to be disposed and a slot extending from that aperture, and the second mask having an aperture therein aligned with the said aperture in the first mask, disposing the said electroluminescent material in the said aligned apertures, removing the said second mask when the electroluminescent material in the said apertures has solidified, forming the said other electrode on the exposed surface of the said electroluminescent material and within the slot, and removing the first mask.
Claim 2
Independent Claim
165 words
A method of manufacturing a display device having a layer of electroluminescent material which is disposed between a pair of electrodes to which a voltage is to be applied to excite the electroluminescent material to luminescence, comprising the steps of disposing on an assembly having a substrate with one of the said electrodes thereon, first and second masks with the masks overlying one another, the first mask being disposed nearest to the said assembly and having formed therein an aperture defining a region in which the said electroluminescent material is to be disposed and a slot extending from that aperture, and the second mask having an aperture therein aligned with the said aperture in the first mask, disposing the said electroluminescent material in the said aligned apertures, removing the said second mask when the electroluminescent material in the said apertures has solidified, forming the said other electrode on the exposed surface of the said electroluminescent material and within the slot, and removing the first mask.
Claim 3
Dependent Claim
41 words
A method according to claim 1, wherein said first mask is adhesively secured to said assembly, the adhesive bond between said first mask and the assembly being such as to permit the first mask to be readily removed from the assembly.
Claim 4
Dependent Claim
44 words
A method according to claim 1 wherein said second mask is adhesively secured to said first mask, the adhesive bond between said second mask and said first mask being such as to permit said second mask to be readily removed from said first mask.
Claim 5
Dependent Claim
17 words
A method according to claim 1, wherein said apertures are substantially filled with the said electroluminescent material.
Claim 6
Dependent Claim
33 words
A method according to claim 4, including the step of removing any excess said electroluminescent material so that the exposed surfaces of that material and said second mask are flush with one another.
Claim 7
Dependent Claim
19 words
A method according to claim 1, wherein said electroluminescent material is allowed to dry before removing said second mask.
Claim 8
Dependent Claim
17 words
A method according to claim 1, wherein said electroluminescent material is cured before removing said second mask.
Claim 9
Independent Claim
236 words
A method of manufacturing a display device having a layer of electroluminescent material which is disposed between a pair of electrodes to which a voltage is to be applied to excite the electroluminescent material to luminescence, comprising the steps of disposing on an assembly having a substrate with one of the said electrodes thereon, first and second masks with the masks overlying one another, the first mask being disposed nearest to the said assembly and having formed therein an aperture defining a region in which the said electroluminescent material is to be disposed and a slot extending from that aperture, and the second mask having an aperture therein aligned with the said aperture in the first mask, said first mask being adhesively secured to said assembly, the adhesive bond between said first mask and said assembly being such as to permit the first mask to be readily removed from the assembly, said second mask being adhesively secured to said first mask, the adhesive bond between said second mask and said first mask being such as to permit said second mask to be readily removed from said first mask, disposing the said electroluminescent material in the said aligned apertures, removing the said second mask when the electroluminescent material in the said apertures has solidified, forming the said other electrode on the exposed surface of the said electroluminescent material and within the slot, and removing the first mask.
Claim 10
Independent Claim
236 words
A method of manufacturing a display device having a layer of electroluminescent material which is disposed between a pair of electrodes to which a voltage is to be applied to excite the electroluminescent material to luminescence, comprising the steps of disposing on an assembly having a substrate with one of the said electrodes thereon, first and second masks with the masks overlying one another, the first mask being disposed nearest to the said assembly and having formed therein an aperture defining a region in which the said electroluminescent material is to be disposed and a slot extending from that aperture, and the second mask having an aperture therein aligned with the said aperture in the first mask, said first mask being adhesively secured to said assembly, the adhesive bond between said first mask and said assembly being such as to permit the first mask to be readily removed from the assembly, said second mask being adhesively secured to said first mask, the adhesive bond between said second mask and said first mask being such as to permit said second mask to be readily removed from said first mask, disposing the said electroluminescent material in the said aligned apertures, removing the said second mask when the electroluminescent material in the said apertures has solidified, forming the said other electrode on the exposed surface of the said electroluminescent material and within the slot, and removing the first mask.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-10-09 | 1982-04-10 | 1982-10-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-10-09 | 1986-04-10 | 1986-10-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-10-09 | 1990-04-10 | 1990-10-10 | $7700.00 | Window Closed / Lapsed |