US5028547A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Manufacture of a color image sensor
Assignee: Toshiba Corp
•
Filing: 1990-06-12
•
Granted: 1991-07-02
•
Expires: 2010-06-12
Abstract
Abstract There is provided an improvement on a solid-state type color image sensor having a color filter arrangement matching the line sequential color difference signal method. A color filter selected from magenta, yellow and cyan for covering the entire area of each picture cell and a color filter of a different color are superposed one upon the other. The color filters covering predetermined ratios of the areas of associated picture cells are preferably formed collectively in a stripe shape.
Inventors
- 👤 Yasuo Iizuka
- 👤 Hirokazu Ichikawa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 23:38
CPC Classifications
H; H10; H10F; H10F77/00; H10F77/30; H10F77/306; H10F77/331; H10F39/00; H10F39/10; H10F39/12; H10F39/15; H10F39/156
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
217 words
A method of manufacturing a solid-state color image sensor of the type forming color filters of a plurality of different colors above a plurality of photosensitive picture cells disposed in a matrix configuration on a semiconductor substrate surface, comprising the following steps (a) to (e) which are carried out sequentially in an optional order: (a) forming a color filter of a first color at the position covering the entire area of a first type picture cell, said first color being one of the colors including magenta, yellow and cyan; (b) forming a color filter of said first color at the position covering a predetermined ratio of the entire area of a second or third type picture cell; (c) forming a color filter of a second color at the position covering the entire area of said second type picture cell, said second color being another of the colors including magenta, yellow and cyan; (d) forming a color filter of said second color at the position covering a predetermined ratio of the entire area of a fourth type picture cell; and (e) forming a color filter of a third color at the position covering the entire area of said third or fourth type picture cell, said third color being the other of the colors including magenta, yellow and cyan.
Claim 2
Independent Claim
217 words
A method of manufacturing a solid-state color image sensor of the type forming color filters of a plurality of different colors above a plurality of photosensitive picture cells disposed in a matrix configuration on a semiconductor substrate surface, comprising the following steps (a) to (e) which are carried out sequentially in an optional order: (a) forming a color filter of a first color at the position covering the entire area of a first type picture cell, said first color being one of the colors including magenta, yellow and cyan; (b) forming a color filter of said first color at the position covering a predetermined ratio of the entire area of a second or third type picture cell; (c) forming a color filter of a second color at the position covering the entire area of said second type picture cell, said second color being another of the colors including magenta, yellow and cyan; (d) forming a color filter of said second color at the position covering a predetermined ratio of the entire area of a fourth type picture cell; and (e) forming a color filter of a third color at the position covering the entire area of said third or fourth type picture cell, said third color being the other of the colors including magenta, yellow and cyan.
Claim 3
Dependent Claim
17 words
A solid state color image sensor according to claim 1, wherein said predetermined ratio is a half.
Claim 4
Dependent Claim
57 words
A method according to claim 1, wherein said steps (a) and (b) and said steps (d) and (e) are carried out at the same time, respectively, to form the color filters covering the entire areas of associated picture cells and the color filters covering halves of the entire areas of associated picture cells, within the same layer.
Claim 5
Dependent Claim
27 words
A method according to claim 1, wherein said steps (b) and (d) form a stripe-shaped color filter and are carried out after said steps (a) and (c).
Claim 6
Dependent Claim
17 words
A method according to claim 4, wherein said third color is a magenta with twice the transmittance.
Claim 7
Dependent Claim
24 words
A method according to claim 5, wherein coloring with twice the transmittance is obtained by making half a dipping time into a coloring liquid.
Claim 8
Dependent Claim
23 words
A method according to claim 5, wherein coloring with twice the transmittance is obtained by using a dipping liquid with twice the transmittance.
References Cited (Backward Citations)
US4071853A
Cited
US4042956A
Cited
JPS5795786A
Cited
US4630106A
Cited
US4667392A
Cited
JPS59104610A
Cited
US4608750A
Cited
JPS6142950A
Cited
US4671853A
Cited
US4819074A
Cited
JPS62269588A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1994-07-01 | 1994-12-31 | 1995-07-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-07-01 | 1998-12-31 | 1999-07-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-07-01 | 2002-12-31 | 2003-07-02 | $7700.00 | Window Closed / Lapsed |