EP0289044A2
Expired / Lapsed
EP
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Color image sensor and manufacturing method thereof
Assignee: Toshiba Corp
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Filing: 1988-04-29
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Granted: —
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Expires: 2008-04-29
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 (31), yellow (11) and cyan (21) for covering the entire area of each picture cell (2) 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 (12, 22). With this construction, adverse effects by positional displacement of color filters do not occur.
Inventors
- 👤 Yasuo Iizuka
- 👤 Hirokazu Ichikawa
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-09 19:38
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: 18
Claim 1
Independent Claim
209 words
A solid-state color image sensor having a plurality of photosensitive picture cells disposed in a matrix configuration on a semiconductor substrate surface, and pairs of two different color filters per each picture cell, the area of each color filter being a predetermined ratio of area of each picture cell, the colors including first to third colors each representative of magenta (31), yellow (11) or cyan (21), and the pairs including a pair of magenta and cyan, a pair of cyan and green, a pair of green and yellow, and a pair of yellow and magenta, characterized in that said color image sensor comprises color filters of said first color used for color filters each covering the entire area of a first type picture cell, and for color filters each covering a predetermined ratio of the entire area of a second or third type picture cell; color filters of said second color used for color filters each covering the entire area of said second type picture cell, and for color filters each covering a predetermined ratio of the entire area of a fourth type picture cell; and color filters of said third color used for color filters each covering the entire area of said third or fourth type picture cell.
Claim 2
Dependent Claim
209 words
A solid-state color image sensor having a plurality of photosensitive picture cells disposed in a matrix configuration on a semiconductor substrate surface, and pairs of two different color filters per each picture cell, the area of each color filter being a predetermined ratio of area of each picture cell, the colors including first to third colors each representative of magenta (31), yellow (11) or cyan (21), and the pairs including a pair of magenta and cyan, a pair of cyan and green, a pair of green and yellow, and a pair of yellow and magenta, characterized in that said color image sensor comprises color filters of said first color used for color filters each covering the entire area of a first type picture cell, and for color filters each covering a predetermined ratio of the entire area of a second or third type picture cell; color filters of said second color used for color filters each covering the entire area of said second type picture cell, and for color filters each covering a predetermined ratio of the entire area of a fourth type picture cell; and color filters of said third color used for color filters each covering the entire area of said third or fourth type picture cell.
Claim 3
Dependent Claim
45 words
A solid-state color image sensor according to claim 1, wherein the color filters covering the predetermined ratios of the entire areas of respective picture cells are formed collectively in a stripe shape traversing substantially at the center of each picture cell on the same line.
Claim 4
Dependent Claim
32 words
A solid-state color image sensor according to claim 1, wherein the color filter covering a predetermined ratio of the entire area of each picture cell is formed circular within the picture cell.
Claim 5
Dependent Claim
31 words
A solid-state color image sensor according to claim 1, wherein the color filter covering a half of the entire area of each picture cell is formed rectangular within the picture cell.
Claim 6
Dependent Claim
16 words
A solid-state color image sensor according to claim 1 wherein said predetermined ratio is a half.
Claim 7
Dependent Claim
175 words
A solid-state color image sensor of the type adopting a line sequential color difference signal method and having a plurality of photosensitive picture cells disposed in a matrix configuration on a semiconductor substrate surface, and pairs of two different color filters per each picture cell, the area of each color filter being a predetermined ratio of the area of each picture cell, and the pairs including a pair of magenta and cyan, a pair of cyan and green, a pair of green and yellow, and a pair of yellow and magenta, characterized in that said color image sensor comprises said color filters including a stripe-shaped second cyan color filter formed on the upper layer of a layer where yellow color filters and magenta color filters with a predetermined ratio of a density are alternately disposed in alignment with a line, and a stripe-shaped second yellow color filter formed on the upper layer of a layer where cyan color filters and magenta color filters with half a density are alternately disposed in alignment with a line.
Claim 8
Dependent Claim
175 words
A solid-state color image sensor of the type adopting a line sequential color difference signal method and having a plurality of photosensitive picture cells disposed in a matrix configuration on a semiconductor substrate surface, and pairs of two different color filters per each picture cell, the area of each color filter being a predetermined ratio of the area of each picture cell, and the pairs including a pair of magenta and cyan, a pair of cyan and green, a pair of green and yellow, and a pair of yellow and magenta, characterized in that said color image sensor comprises said color filters including a stripe-shaped second cyan color filter formed on the upper layer of a layer where yellow color filters and magenta color filters with a predetermined ratio of a density are alternately disposed in alignment with a line, and a stripe-shaped second yellow color filter formed on the upper layer of a layer where cyan color filters and magenta color filters with half a density are alternately disposed in alignment with a line.
Claim 9
Dependent Claim
38 words
A solid-state color image sensor according to claim 6, wherein said stripe-shaped filter formed on the upper layer has a width of a predetermined ratio that of an opening formed in said layer with alternative color filter arrangement.
Claim 10
Dependent Claim
16 words
A solid-state color image sensor according to claim 7, wherein said predetermined ratio is a half.
Claim 11
Independent Claim
221 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, characterized in that said method comprises 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 half 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 12
Independent Claim
221 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, characterized in that said method comprises 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 half 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 13
Dependent Claim
16 words
A solid-state color image sensor according to claim 9 wherein said predetermined ratio is a half.
Claim 14
Dependent Claim
57 words
A method according to claim 9, 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 15
Dependent Claim
27 words
A method according to claim 9, wherein said steps (b) and (d) form a stripe-shaped color filter and are carried out after said steps (a) and (c).
Claim 16
Dependent Claim
17 words
A method according to claim 12, wherein said third color is a magenta with half a density.
Claim 17
Dependent Claim
24 words
A method according to claim 13, wherein coloring with half a density is obtained by making half a dipping time into a coloring liquid.
Claim 18
Dependent Claim
23 words
A method according to claim 13, wherein coloring with half a density is obtained by using a dipping liquid with half a density.
References Cited (Backward Citations)
No citation records indexed.
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