Patent US5240797A successfully refreshed from Google Patents.
US5240797A
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Thin film device and method of manufacture
Assignee: Seiko Epson Corp
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Filing: 1991-06-13
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Granted: 1993-08-31
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Expires: 2011-06-13
Abstract
Abstract Thin film devices including a film of a functional organic material, inorganic material or mixtures which are either insoluble or sparingly soluble in water, and deposited by electroplating. Particles of the functional material are dispersed in a micelle solution of a surfactant which is oxidizable and reducible by electrolysis in a colloidal state. Thin film devices prepared include color filters, optical recording media, electrochemical photoreceptors, nonlinear switching elements, and other devices requiring thin films of materials which are substantially insoluble in water.
Inventors
- 👤 Fumiaki Matsushima
- 👤 Mitsuro Atobe
- 👤 Yoshihiro Ono
- 👤 Yasuto Nose
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 10:29
CPC Classifications
G; G11; G11B; G11B7/00; G11B7/24; G11B7/241; G11B7/252; G11B7/257; G02; G02F; G02F1/00; G02F1/01; G02F1/13; G02F1/133; G02F1/1333; G02F1/1335; G02F1/133509; G02F1/133514; G02F1/133516; G02F1/136; G02F1/1362; G02F1/1365; G03; G03C; G03C1/00; G03C1/72; G03C1/73; G03F; G03F7/00; G03F7/0005; G03F7/0007; G11B7/242; G11B7/243; G11B7/244; G11B7/246; G11B7/248; G11B2007/24318; G11B2007/24326; G11B7/2467; G11B7/249; G11B7/253; G11B7/2531
Claims Analysis
Total Claims: 28
Claim 1
Independent Claim
323 words
A method of forming a color filter, comprising: disposing a transparent conductive layer on a transparent substrate in the form of at least three groups of conductive stripes; creating a red colloidal dispersion, a green colloidal dispersion and a blue colloidal dispersion, each dispersion being of fine particles of at least two organic pigments, each pigment having a different light transmission wavelength and each pigment having a primary particle size of from 0.005 to 0.5 μm in an aqueous micelle solution of a redox-reactive surfactant; inserting an electrode into a first of the red, green and blue colloidal dispersions; immersing the substrate with the conductive layer into the first of the red, green and blue colloidal dispersions; applying voltage between the electrode and a first group of conductive stripes of the conductive layer sufficient to apply sufficient current between the electrode and the first group of conductive stripes to deposit a thin film layer of at least two organic pigments from the first of the red, green and blue colloidal dispersions on the first group of conductive stripes; inserting the substrate and an electrode into the second of the red, green and blue dispersions and applying voltage between the electrode and a second group of conductive stripes of the conductive layer to deposit a thin film layer of at least two organic pigments from the second of the red, green and blue colloidal dispersions on the second group of conductive stripes; and inserting the substrate and an electrode into the colloidal dispersion of a third of the red, green and blue dispersions and applying voltage between the electrode and a third group of conductive stripes of the conductive layer to deposit a thin film layer of at least two organic pigments from the third of the red, green and blue colloidal dispersions on the third group of conductive stripes to provide a substrate having red, green and blue colored groups of conductive stripes.
Claim 2
Independent Claim
323 words
A method of forming a color filter, comprising: disposing a transparent conductive layer on a transparent substrate in the form of at least three groups of conductive stripes; creating a red colloidal dispersion, a green colloidal dispersion and a blue colloidal dispersion, each dispersion being of fine particles of at least two organic pigments, each pigment having a different light transmission wavelength and each pigment having a primary particle size of from 0.005 to 0.5 μm in an aqueous micelle solution of a redox-reactive surfactant; inserting an electrode into a first of the red, green and blue colloidal dispersions; immersing the substrate with the conductive layer into the first of the red, green and blue colloidal dispersions; applying voltage between the electrode and a first group of conductive stripes of the conductive layer sufficient to apply sufficient current between the electrode and the first group of conductive stripes to deposit a thin film layer of at least two organic pigments from the first of the red, green and blue colloidal dispersions on the first group of conductive stripes; inserting the substrate and an electrode into the second of the red, green and blue dispersions and applying voltage between the electrode and a second group of conductive stripes of the conductive layer to deposit a thin film layer of at least two organic pigments from the second of the red, green and blue colloidal dispersions on the second group of conductive stripes; and inserting the substrate and an electrode into the colloidal dispersion of a third of the red, green and blue dispersions and applying voltage between the electrode and a third group of conductive stripes of the conductive layer to deposit a thin film layer of at least two organic pigments from the third of the red, green and blue colloidal dispersions on the third group of conductive stripes to provide a substrate having red, green and blue colored groups of conductive stripes.
Claim 3
Dependent Claim
61 words
The method of claim 1, wherein the organic pigment is selected from the group consisting of a phthalocyanine pigments, anthraquinone pigments, thioindigo pigments, perylene pigments, quinacridone pigments, dioxazine pigments, isoindolinone pigments, quinophthalone pigments, perinone pigments, nitro pigments, nitroso pigments, azo complex salt pigments, condensed azo pigments, benzoimidazolone pigments, metal complex pigments, aniline black, daylight fluorescent pigments, diketopyrrolopyrrole pigments and combinations thereof.
Claim 4
Dependent Claim
34 words
The method of claim 1, wherein a doping material is added to the colloidal dispersions and is deposited with the organic pigments for improving the conductivity of the thin films of organic pigment material.
Claim 5
Dependent Claim
14 words
The method of claim 3, wherein the doping material includes a halogen containing material.
Claim 6
Dependent Claim
22 words
The material of claim 3, wherein the halogen is selected from the group consistency of metallic iodine salts, iodate and combinations thereof.
Claim 7
Dependent Claim
22 words
The method of claim 1, wherein a light-shielding film is formed at least between the conductive stripes having colored pigment layers thereon.
Claim 8
Dependent Claim
19 words
The method of claim 6, wherein the light-shielding film is a photosetting type of photosensitive resin and contains pigment.
Claim 9
Dependent Claim
17 words
The method of claim 6, wherein the light-shielding film is disposed by a dyeing method using photolithography.
Claim 10
Dependent Claim
49 words
The method of claim 6, wherein at least three groups of conductive stripes are formed in a matrix pattern with spaces therebetween, the light-shielding film being formed by printing with material for the light-shielding film at least between the conductive stripes pattern having colored pigments thin films formed thereon.
Claim 11
Dependent Claim
21 words
The method of claim 3, wherein the doping material includes a halogen and the halogen is deposited with the organic pigments.
Claim 12
Dependent Claim
44 words
The method of claim 1, including doping the thin film of a organic pigments with a halogen by immersing the substrate coated with the organic pigments in an electrolytic solution containing a halogen and performing electrolysis to dope the pigment layers with the halogen.
Claim 13
Dependent Claim
50 words
The method of claim 1 including disposing a light-shielding film at least on portions of the transparent substrate not supporting the transparent conductive layer so that light will not pass through the first substrate, past the transparent conductive layer prior to the step of depositing pigment on the conductive layer.
Claim 14
Dependent Claim
17 words
The method of claim 12, wherein the light-shielding film is disposed by a dyeing method using photolithography.
Claim 15
Dependent Claim
76 words
The method of claim 12, wherein the light-shielding film is formed by disposing a first metal film on the transparent conductive layer on the transparent substrate, coating the first metal film and transparent substrate with a negative resist containing a light-shielding material, exposing with UV light through the side of the transparent substrate opposite the coated side and developing the transparent substrate to form a light-shielding film only between the pattern of the transparent conductive layer.
Claim 16
Dependent Claim
31 words
The method of claim 12, wherein the light-shielding film is formed by printing with material for the light shielding film between the conductive layer pattern having colored thin films formed thereon.
Claim 17
Dependent Claim
67 words
The method of claim 1 including disposing the at least three groups of conductive stripes formed from the conductive layer as a matrix of spaced apart stripes arranged so that the stripes of the at least three groups of conductive stripes are interweaved with each other so that the conductive stripes of each group are not adjacent, whereby colored layers of the same color are not adjacent.
Claim 18
Dependent Claim
16 words
The method of claim 1, wherein the conductive layer includes ITO, tin oxide and combinations thereof.
Claim 19
Dependent Claim
32 words
The method of claim 1, wherein the red colloidal dispersion includes red pigment having an essential light transmission wavelength in the range of about 600 to 700 nm and yellow colored pigment.
Claim 20
Dependent Claim
17 words
The method of claim 18, wherein the ratio of red pigment to yellow pigment is about 8:2.
Claim 21
Dependent Claim
30 words
The method of claim 1, wherein the green colloidal dispersion includes green pigment having an essential light transmission wavelength in the range from 500 to 550 nm and yellow pigment.
Claim 22
Dependent Claim
17 words
The method of claim 20, wherein the ratio of green pigment to yellow pigment is about 6:4.
Claim 23
Dependent Claim
30 words
The method of claim 1, wherein the blue colloidal dispersion includes blue pigment having an essential light transmission wavelength in the range of 450-500 nm and red violated colored pigment.
Claim 24
Dependent Claim
18 words
The method of claim 22, wherein the ratio of blue pigment to red violet pigment is about 7:3.
Claim 25
Dependent Claim
30 words
The method of claim 1, wherein the reaction conditions and particles sizes are controlled to yield thin films of pigment material of about 0.4 to about 1.1 μm in thickness.
Claim 26
Dependent Claim
15 words
The method of claim 1, wherein a supporting electrolyte is added to the colloidal dispersions.
Claim 27
Dependent Claim
59 words
The method of claim 1, including the step of forming a portion of the striped electrode pattern into a form to which an IC for driving a liquid crystal display can be mounted and constructing and arranging the stripes and substrate so that the color filter is suitable for use as a color filter for a liquid crystal display.
Claim 28
Dependent Claim
60 words
The method of claim 1, wherein the at least two pigments in each colloidal dispersion are selected so that a first of the two pigments provides the primary color tone of the pigment layer and the second of the two pigments compensates for undesirable color tones in the first pigments by substantially not transmitting light of the undesirable color tone.
References Cited (Backward Citations)
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| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
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| 3.5 Years (Year 4) | 1996-08-30 | 1997-03-01 | 1997-08-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2000-08-30 | 2001-03-01 | 2001-08-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2004-08-30 | 2005-03-01 | 2005-08-31 | $7700.00 | Window Closed / Lapsed |